{"type": "FeatureCollection", "features": [{"id": "10.1016/j.jenvman.2012.01.008", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:17:13Z", "type": "Journal Article", "created": "2012-01-31", "title": "Nitrate-Nitrogen Reduction By Established Tree And Pasture Buffer Strips Associated With A Cattle Feedlot Effluent Disposal Area Near Armidale, Nsw Australia", "description": "Vegetated buffer strips have been recognized as an important element in overall agro-ecosystem management to reduce the delivery of non-point source pollutants from agricultural land to inland water systems. A buffer strip experiment consisting of two tree species (Eucalyptus camaldulensis and Casuarina cunninghamiana) with two planting densities and a pasture treatment was conducted to determine the effectiveness of NO(3)-N removal from a cattle feedlot effluent disposal area at Tullimba near Armidale, NSW Australia. Different management methods were applied for the buffers where grass and weeds were mowed 2-3 times during the second and third years and were not managed during the rest experimental years for the tree buffer, while grass was harvested 1-3 times per year for the pasture buffer. The differences between tree species and planting density significantly affected tree growth, but the growth difference did not significantly affect their capacities to reduce NO(3)-N in soil surface runoff and groundwater. On average for all the tree and pasture treatments, the buffer strips reduced NO(3)-N concentration by 8.5%, 14.7% and 14.4% for the surface runoff, shallow and deep groundwater respectively. The tree and pasture buffer strips were not significantly different in NO(3)-N reduction for both shallow and deep groundwater while the pasture buffer strips reduced significantly more NO(3)-N concentration in surface runoff than the tree buffer strips. Both buffer strips reduced more than 50% of surface runoff volume indicating that both the tree and pasture buffer strips were efficient at removing water and nutrients, mostly through a significant reduction in soil surface runoff volume.", "keywords": ["Eucalyptus", "Nitrates", "Nitrogen", "Water Pollution", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "Trees", "Manure", "Biodegradation", " Environmental", "Waste Management", "Animals", "0401 agriculture", " forestry", " and fisheries", "Cattle", "New South Wales", "0105 earth and related environmental sciences"], "contacts": [{"organization": "John Duggin, Liangmin Wang, Daoping Nie,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.jenvman.2012.01.008"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jenvman.2012.01.008", "name": "item", "description": "10.1016/j.jenvman.2012.01.008", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jenvman.2012.01.008"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-05-01T00:00:00Z"}}, {"id": "10.1016/j.jenvman.2013.02.009", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:17:13Z", "type": "Journal Article", "created": "2013-03-27", "title": "Forest Wildfire, Fuel Reduction Treatments, And Landscape Carbon Stocks: A Sensitivity Analysis", "description": "Fuel reduction treatments prescribed in fire-suppressed forests of western North America pose an apparent paradox with respect\u00a0to terrestrial carbon management. Such treatments have the immediate effect of reducing forest carbon stocks but likely reduce future carbon losses through the combustion and mortality caused by high-severity wildfires. Assessing the long-term impact of fuel treatment on the carbon balance of fire-prone forests has been difficult because of uncertainties regarding treatment and wildfire impacts on any given landscape. In this study we attempt to remove some of the confusion surrounding this subject by performing a sensitivity analysis wherein long-term, landscape-wide carbon stocks are simulated under a wide range of treatment efficacy, treatment lifespan, fire impacts, forest recovery rates, forest decay rates, and the longevity of wood products. Our results indicate a surprising insensitivity of long-term carbon stocks to both management and biological variables. After 80 years, a 1600% change in either forest growth or decomposition resulted in only a 40% change in total system carbon, and a 1600% change in either treatment application rate or efficacy in arresting fire spread resulted in only a 10% change in total system carbon. This insensitivity of long-term carbon stocks is due in part by the infrequency of treatment-wildfire interaction and in part by the controls imposed by maximum forest biomass. None of the fuel treatment simulation scenarios resulted in increased system carbon.", "keywords": ["Oregon", "13. Climate action", "Forestry", "Biomass", "15. Life on land", "Models", " Biological", "01 natural sciences", "Fires", "Carbon Cycle", "Trees", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.jenvman.2013.02.009"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.jenvman.2013.02.009", "name": "item", "description": "10.1016/j.jenvman.2013.02.009", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.jenvman.2013.02.009"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-05-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2013.10.011", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:17:25Z", "type": "Journal Article", "created": "2013-10-26", "title": "Shifts In The Abundance And Community Structure Of Soil Ammonia Oxidizers In A Wet Sclerophyll Forest Under Long-Term Prescribed Burning", "description": "Fire shapes global biome distribution and promotes the terrestrial biogeochemical cycles. Ammonia-oxidizing bacteria (AOB) and archaea (AOA) play a vital role in the biogeochemical cycling of nitrogen (N). However, behaviors of AOB and AOA under long-term prescribed burning remain unclear. This study was to examine how fire affected the abundances and communities of soil AOB and AOA. A long-term repeated forest fire experiment with three burning treatments (never burnt, B0; biennially burnt, B2; and quadrennially burnt, B4) was used in this study. The abundances and community structure of soil AOB and AOA were determined using quantitative PCR, restriction fragment length polymorphism and clone library. More frequent fires (B2) increased the abundance of bacterium amoA gene, but tended to decrease archaeal amoA genes. Fire also modified the composition of AOA and AOB communities. Canonical correspondence analysis showed soil pH and dissolved organic C (DOC) strongly affected AOB genotypes, while nitrate-N and DOC shaped the AOA distribution. The increased abundance of bacterium amoA gene by fires may imply an important role of AOB in nitrification in fire-affected soils. The fire-induced shift in the community composition of AOB and AOA demonstrates that fire can disturb nutrient cycles.", "keywords": ["0301 basic medicine", "570", "0303 health sciences", "Bacteria", "Nitrogen", "Forestry", "Biodiversity", "15. Life on land", "Archaea", "Nitrification", "Fires", "Trees", "Soil", "03 medical and health sciences", "Biodegradation", " Environmental", "Soil biology", "Ammonia", "13. Climate action", "Oxidation-Reduction", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2013.10.011"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2013.10.011", "name": "item", "description": "10.1016/j.scitotenv.2013.10.011", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2013.10.011"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-02-01T00:00:00Z"}}, {"id": "10.1016/j.landusepol.2022.106065", "type": "Feature", "geometry": null, "properties": {"updated": 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\u0643\u0645\u0646\u0627\u0637\u0642 \u0627\u0633\u062a\u0639\u0627\u062f\u0629 \u0645\u062d\u062a\u0645\u0644\u0629 \u0644\u062a\u0639\u0632\u064a\u0632 \u062a\u0648\u0641\u064a\u0631 \u062e\u062f\u0645\u0627\u062a \u0627\u0644\u0646\u0638\u0627\u0645 \u0627\u0644\u0625\u064a\u0643\u0648\u0644\u0648\u062c\u064a.", "keywords": ["Period (music)", "Soil Degradation", "Vascular Flora of Mediterranean Europe and North Africa", "Soil Science", "Orchard", "Plant Science", "Mediterranean", "Horticulture", "Genetic and Environmental Factors in Grapevine Cultivation", "01 natural sciences", "Environmental science", "Agricultural and Biological Sciences", "Pathology", "Ecosystem services", "Landscape elements", "Agroforestry", "Irrigation", "Biology", "0105 earth and related environmental sciences", "2. Zero hunger", "Geography", "Ecology", "Physics", "Common agricultural policy", "Olive groves", "Life Sciences", "Agriculture", "Forestry", "Acoustics", "04 agricultural and veterinary sciences", "15. Life on land", "Soil Erosion and Agricultural Sustainability", "Olive trees", "Agronomy", "Sustainability", "Archaeology", "FOS: Biological sciences", "Shifting cultivation", "Medicine", "0401 agriculture", " forestry", " and fisheries", "Vegetation (pathology)"]}, "links": [{"href": "https://doi.org/10.1016/j.landusepol.2022.106065"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Land%20Use%20Policy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.landusepol.2022.106065", "name": "item", "description": "10.1016/j.landusepol.2022.106065", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.landusepol.2022.106065"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-05-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2006.08.033", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:17:24Z", "type": "Journal Article", "created": "2006-10-05", "title": "Changes In Lead Availability Affect Bacterial Community Structure But Not Basal Respiration In A Microcosm Study With Forest Soils", "description": "This study investigates the effects of Pb during time on the bacterial communities of forest soils using water-extractable Pb concentrations in the soil solution as predictors of Pb bioavailability. In a microcosm experiment we applied increasing concentrations of Pb(NO(3))(2) solutions (0.5, 2, 8, 32 mM) to 5 forest soils of pH<5 and to a calcareous soil of pH>6.5. Sampling of the microcosms was performed after 3, 30 and 90 days of incubation. Community analysis included basal respiration rates and changes in the structure of the bacterial communities through T-RFLP fingerprinting. We also investigated functional stability in terms of resistance, expressed as the effects on basal respiration after 3 days of incubation, and of resilience, expressed as the recovery of bacterial community structure and of respiration rates after 90 days of incubation. Water-extractable Pb increased with time in most of the soils, in parallel with an increase of water-extractable dissolved organic carbon (DOC). The increased concentrations slightly affected bacterial community structure, although OTU (operational taxonomic unit) richness was not significantly reduced with Pb concentrations in any of the soils. The highest Pb treatment (32 mM) caused significant effects on basal respiration in some of the acidic soils, but no clear trend was observed in relation to increased Pb bioavailability with time. Resistance to Pb additions was evident in five of the six soils, but only two showed resilience after 90 days. This is the first study showing the effects of time on Pb bioavailability in soils and on the resulting reactions of the soil microbial communities.", "keywords": ["DNA", " Bacterial", "Nitrates", "04 agricultural and veterinary sciences", "15. Life on land", "Models", " Biological", "6. Clean water", "Trees", "Oxygen", "RNA", " Bacterial", "Soil", "Lead", "RNA", " Ribosomal", " 16S", "Soil Pollutants", "0401 agriculture", " forestry", " and fisheries", "Ecosystem", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2006.08.033"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2006.08.033", "name": "item", "description": "10.1016/j.scitotenv.2006.08.033", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2006.08.033"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-12-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2010.09.029", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:17:25Z", "type": "Journal Article", "created": "2010-10-19", "title": "The Effects Of Phytophagous Insects On Water And Soil Nutrient Concentrations And Fluxes Through Forest Stands Of The Level Ii Monitoring Network In The Uk", "description": "The effects of insect defoliators on throughfall and soil nutrient fluxes were studied in coniferous and deciduous stands at five UK intensive monitoring plots (1998 to 2008). Links were found between the dissolved organic carbon (DOC), nitrogen (N) and potassium (K) fluxes through the forest system to biological activity within the canopy. Underlying soil type determined the leaching or accumulation of these elements. Under oak, monitored at two sites, frass from caterpillars of Tortrix viridana and Operophtera brumata added direct deposition of ~16kgha(-1)extra N during defoliation. Peaks of nitrate (NO(3)-N) flux between 5 and 9kgha(-1) (\u00d75 usual winter values) were recorded in consecutive years in shallow soil waters. Synchronous rises in deep soil NO(3)-N fluxes at the Grizedale sandy site indicate downward flushing, not seen at the clay site. Under three Sitka spruce stands, generation of honeydew (DOC) was attributed to two aphid species (Elatobium abietinum and Cinara pilicornis) with distinctive feeding strategies. Throughfall DOC showed mean annual fluxes (6 seasons) ~45-60kgha(-1) compared with rainfall values of 14-22kgha(-1). Increases of total N in throughfall and NO(3)-N fluxes in shallow soil solution were detected - soil water fluxes reached 8kgha(-1) in Llyn Brianne, ~25kgha(-1) in Tummel, and ~40kg NO(3)-Nha(-1) in Coalburn. At Tummel, on sandy soil, NO(3)-N leaching showed increased concentration at depth, attributed to microbiological activity within the soil. By contrast, at Coalburn and Llyn Brianne, sites on peaty gleys, soil water NO(3)-N was retained mostly within the humus layer. Soil type is thus key to predicting N movement and retention patterns. These long term analyses show important direct and indirect effects of phytophagous insects in forest ecosystems, on above and below ground processes affecting tree growth, soil condition, vegetation and water quality.", "keywords": ["0106 biological sciences", "Insecta", "Nitrogen", "Fresh Water", "Nitrogen Cycle", "15. Life on land", "01 natural sciences", "United Kingdom", "Trees", "Soil", "13. Climate action", "Animals", "Soil Pollutants", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2010.09.029"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2010.09.029", "name": "item", "description": "10.1016/j.scitotenv.2010.09.029", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2010.09.029"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-12-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2013.05.071", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:17:25Z", "type": "Journal Article", "created": "2013-06-19", "title": "Soil Biochemical Properties And Microbial Resilience In Agroforestry Systems: Effects On Wheat Growth Under Controlled Drought And Flooding Conditions", "description": "Agroforestry is increasingly viewed as an effective means of maintaining or even increasing crop and tree productivity under climate change while promoting other ecosystem functions and services. This study focused on soil biochemical properties and resilience following disturbance within agroforestry and conventional agricultural systems and aimed to determine whether soil differences in terms of these biochemical properties and resilience would subsequently affect crop productivity under extreme soil water conditions. Two research sites that had been established on agricultural land were selected for this study. The first site included an 18-year-old windbreak, while the second site consisted in an 8-year-old tree-based intercropping system. In each site, soil samples were used for the determination of soil nutrient availability, microbial dynamics and microbial resilience to different wetting-drying perturbations and for a greenhouse pot experiment with wheat. Drying and flooding were selected as water stress treatments and compared to a control. These treatments were initiated at the beginning of the wheat anthesis period and maintained over 10 days. Trees contributed to increase soil nutrient pools, as evidenced by the higher extractable-P (both sites), and the higher total N and mineralizable N (tree-based intercropping site) found in the agroforestry compared to the conventional agricultural system. Metabolic quotient (qCO2) was lower in the agroforestry than in the conventional agricultural system, suggesting higher microbial substrate use efficiency in agroforestry systems. Microbial resilience was higher in the agroforestry soils compared to soils from the conventional agricultural system (windbreak site only). At the windbreak site, wheat growing in soils from agroforestry system exhibited higher aboveground biomass and number of grains per spike than in conventional agricultural system soils in the three water stress treatments. At the tree-based intercropping site, higher wheat biomass, grain yield and number of grains per spike were observed in agroforestry than in conventional agricultural system soils, but in the drought treatment only. Drought (windbreak site) and flooding (both sites) treatments significantly reduced wheat yield and 1000-grain weight in both types of system. Relationships between soil biochemical properties and soil microbial resilience or wheat productivity were strongly dependent on site. This study suggests that agroforestry systems may have a positive effect on soil biochemical properties and microbial resilience, which could operate positively on crop productivity and tolerance to severe water stress.", "keywords": ["2. Zero hunger", "Forestry", "04 agricultural and veterinary sciences", "15. Life on land", "Floods", "6. Clean water", "Droughts", "Trees", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Ecosystem", "Plant Physiological Phenomena", "Soil Microbiology", "Triticum"], "contacts": [{"organization": "Alain Olivier, David Rivest, Miren Lorente, Christian Messier,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2013.05.071"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2013.05.071", "name": "item", "description": "10.1016/j.scitotenv.2013.05.071", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2013.05.071"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-10-01T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2017.02.229", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:17:27Z", "type": "Journal Article", "created": "2017-03-03", "title": "The Influence Of Tree Species On Small Scale Spatial Heterogeneity Of Soil Respiration In A Temperate Mixed Forest", "description": "Soil respiration is the largest terrestrial carbon flux into the atmosphere, and different tree species could directly influence root derived respiration and indirectly regulate soil respiration rates by altering soil chemical and microbial properties. In this study, we assessed the small scale spatial heterogeneity of soil respiration and the microbial community below the canopy of three dominant tree species (Korean pine (Pinus koraiensis), Mongolian oak (Quercus mongolica), and Manchuria ash (Fraxinus mandshurica)) in a temperate mixed forest in Northeast China. Soil respiration differed significantly during several months and increased in the order of oakTo examine the mechanisms of earthworm effects on forest soil C and N, we double\uffe2\uff80\uff90labeled leaf litter with13C and15N, applied it to sugar maple forest plots with and without earthworms, and traced isotopes into soil pools. The experimental design included forest plots with different earthworm community composition (dominated byLumbricus terrestrisorL. rubellus). Soil carbon pools were 37% lower in earthworm\uffe2\uff80\uff90invaded plots largely because of the elimination of the forest floor horizons, and mineral soil C:N was lower in earthworm plots despite the mixing of high C:N organic matter into soil by earthworms. Litter disappearance over the first winter\uffe2\uff80\uff93spring was highest in theL. terrestris(T) plots, but during the warm season, rapid loss of litter was observed in bothL. rubellus(R) and T plots. After two years, 22.0% \uffc2\uffb1 5.4% of13C released from litter was recovered in soil with no significant differences among plots. Total recovery of added13C (decaying litter plus soil) was much higher in no\uffe2\uff80\uff90worm (NW) plots (61\uffe2\uff80\uff9368%) than in R and T plots (20\uffe2\uff80\uff9329%) as much of the litter remained in the former whereas it had disappeared in the latter. Much higher percentage recovery of15N than13C was observed, with significantly lower values for T than R and NW plots. Higher overwinter earthworm activity in T plots contributed to lower soil N recovery. In earthworm\uffe2\uff80\uff90invaded plots isotope enrichment was highest in macroaggregates and microaggregates whereas in NW plots silt plus clay fractions were most enriched. The net effect of litter mixing and priming of recalcitrant soil organic matter (SOM), stabilization of SOM in soil aggregates, and alteration of the soil microbial community by earthworm activity results in loss of SOM and lowering of the C:N ratio. We suggest that earthworm stoichiometry plays a fundamental role in regulating C and N dynamics of forest SOM.

", "keywords": ["Time Factors", "Nitrogen", "TEMPERATE HARDWOOD FOREST", "New York", "Acer", "C:N ratio", "Trees", "OLD-GROWTH FOREST", "Soil", "litter", "EXOTIC EARTHWORMS", "Animals", "NORTHEASTERN FORESTS", "Oligochaeta", "CARBON DYNAMICS", "Ecosystem", "2. Zero hunger", "decomposition", "NITROGEN DEPOSITION", "Ecology", "Lumbricus", "MICROBIAL BIOMASS", "04 agricultural and veterinary sciences", "15. Life on land", "DECIDUOUS FOREST", "Carbon", "stoichiometry", "aggregate", "0401 agriculture", " forestry", " and fisheries", "LUMBRICUS-TERRESTRIS", "Environmental Sciences", "CENTRAL NEW-YORK", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1890/12-1760.1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecological%20Applications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1890/12-1760.1", "name": "item", "description": "10.1890/12-1760.1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1890/12-1760.1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-07-01T00:00:00Z"}}, {"id": "10.1890/13-0290.1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:20:37Z", "type": "Journal Article", "created": "2013-07-26", "title": "Carbon Accumulation And Nitrogen Pool Recovery During Transitions From Savanna To Forest In Central Brazil", "description": "

The expansion of tropical forest into savanna may potentially be a large carbon sink, but little is known about the patterns of carbon sequestration during transitional forest formation. Moreover, it is unclear how nutrient limitation, due to extended exposure to fire\uffe2\uff80\uff90driven nutrient losses, may constrain carbon accumulation. Here, we sampled plots that spanned a woody biomass gradient from savanna to transitional forest in response to differential fire protection in central Brazil. These plots were used to investigate how the process of transitional forest formation affects the size and distribution of carbon (C) and nitrogen (N) pools. This was paired with a detailed analysis of the nitrogen cycle to explore possible connections between carbon accumulation and nitrogen limitation. An analysis of carbon pools in the vegetation, upper soil, and litter shows that the transition from savanna to transitional forest can result in a fourfold increase in total carbon (from 43 to 179 Mg C/ha) with a doubling of carbon stocks in the litter and soil layers. Total nitrogen in the litter and soil layers increased with forest development in both the bulk (+68%) and plant\uffe2\uff80\uff90available (+150%) pools, with the most pronounced changes occurring in the upper layers. However, the analyses of nitrate concentrations, nitrate\uffe2\uff80\uff8a:\uffe2\uff80\uff8aammonium ratios, plant stoichiometry of carbon and nitrogen, and soil and foliar nitrogen isotope ratios suggest that a conservative nitrogen cycle persists throughout forest development, indicating that nitrogen remains in low supply relative to demand. Furthermore, the lack of variation in underlying soil type (>20 cm depth) suggests that the biogeochemical trends across the gradient are driven by vegetation. Our results provide evidence for high carbon sequestration potential with forest encroachment on savanna, but nitrogen limitation may play a large and persistent role in governing carbon sequestration in savannas or other equally fire\uffe2\uff80\uff90disturbed tropical landscapes. In turn, the link between forest development and nitrogen pool recovery creates a framework for evaluating potential positive feedbacks on savanna\uffe2\uff80\uff93forest boundaries.

", "keywords": ["2. Zero hunger", "0106 biological sciences", "Nitrogen", "04 agricultural and veterinary sciences", "Plants", "15. Life on land", "01 natural sciences", "Carbon", "Trees", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Brazil", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1890/13-0290.1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1890/13-0290.1", "name": "item", "description": "10.1890/13-0290.1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1890/13-0290.1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-02-01T00:00:00Z"}}, {"id": "10.1371/journal.pone.0010867", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:20:07Z", "type": "Journal Article", "created": "2010-05-27", "title": "Ecosystem Carbon Stock Influenced by Plantation Practice: Implications for Planting Forests as a Measure of Climate Change Mitigation", "description": "Uncertainties remain in the potential of forest plantations to sequestrate carbon (C). We synthesized 86 experimental studies with paired-site design, using a meta-analysis approach, to quantify the differences in ecosystem C pools between plantations and their corresponding adjacent primary and secondary forests (natural forests). Totaled ecosystem C stock in plant and soil pools was 284 Mg C ha(-1) in natural forests and decreased by 28% in plantations. In comparison with natural forests, plantations decreased aboveground net primary production, litterfall, and rate of soil respiration by 11, 34, and 32%, respectively. Fine root biomass, soil C concentration, and soil microbial C concentration decreased respectively by 66, 32, and 29% in plantations relative to natural forests. Soil available N, P and K concentrations were lower by 22, 20 and 26%, respectively, in plantations than in natural forests. The general pattern of decreased ecosystem C pools did not change between two different groups in relation to various factors: stand age (< 25 years vs. > or = 25 years), stand types (broadleaved vs. coniferous and deciduous vs. evergreen), tree species origin (native vs. exotic) of plantations, land-use history (afforestation vs. reforestation) and site preparation for plantations (unburnt vs. burnt), and study regions (tropic vs. temperate). The pattern also held true across geographic regions. Our findings argued against the replacement of natural forests by the plantations as a measure of climate change mitigation.", "keywords": ["0106 biological sciences", "Conservation of Natural Resources", "Science", "Climate Change", "Ante-disciplinary", "01 natural sciences", "333", "Trees", "Inclusive", "Open Access", "Soil", "Engineering", "Interdisciplinary", "Biomass", "Biology", "PLOS", "Ecosystem", "2. Zero hunger", "Geography", "Research", "Physics", "Q", "Publications", "R", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "Peer-review", "Carbon", "Open-Access", "Chemistry", "Public Library of Science", "13. Climate action", "Medicine", "0401 agriculture", " forestry", " and fisheries", "Research Article"]}, "links": [{"href": "https://doi.org/10.1371/journal.pone.0010867"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/PLoS%20ONE", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1371/journal.pone.0010867", "name": "item", "description": "10.1371/journal.pone.0010867", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1371/journal.pone.0010867"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-05-27T00:00:00Z"}}, {"id": "10.1016/j.syapm.2012.10.007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:17:55Z", "type": "Journal Article", "created": "2013-01-18", "title": "Shifts In Soil Bacterial Community After Eight Years Of Land-Use Change", "description": "The interaction between plants, soil and microorganisms is considered to be the major driver of ecosystem functions and any modification of plant cover and/or soil properties might affect the microbial structure, which, in turn, will influence ecological processes. Assuming that soil properties are the major drivers of soil bacterial diversity and structure within the same soil type, it can be postulated whether plant cover causes significant shifts in soil bacterial community composition. To address this question, this study used 16S rRNA pyrosequencing to detect differences in diversity, composition and/or relative abundance of bacterial taxa from an area covered by pristine forest, as well as eight-year-old grassland surrounded by the same forest. It was shown that a total of 69% of the operational taxonomic units (OTUs) were shared between environments. Overall, forest and grassland samples presented the same diversity and the clustering analysis did not show the occurrence of very distinctive bacterial communities between environments. However, 11 OTUs were detected in statistically significant higher abundance in the forest samples but in lower abundance in the grassland samples, whereas 12 OTUs occurred in statistically significant higher abundance in the grassland samples but in lower abundance in the forest samples. The results suggested the prevalence of a resilient core microbial community that did not suffer any change related to land use, soil type or edaphic conditions. The results illustrated that the history of land use might influence present-day community structure.", "keywords": ["DNA", " Bacterial", "2. Zero hunger", "Agriculture", "Sequence Analysis", " DNA", "04 agricultural and veterinary sciences", "Plants", "15. Life on land", "Biota", "DNA", " Ribosomal", "Trees", "13. Climate action", "RNA", " Ribosomal", " 16S", "Cluster Analysis", "0401 agriculture", " forestry", " and fisheries", "Phylogeny", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1016/j.syapm.2012.10.007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Systematic%20and%20Applied%20Microbiology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.syapm.2012.10.007", "name": "item", "description": "10.1016/j.syapm.2012.10.007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.syapm.2012.10.007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-03-01T00:00:00Z"}}, {"id": "10.1021/es1024004", "type": "Feature", "geometry": null, "properties": {"license": "unspecified", "updated": "2026-06-24T16:18:05Z", "type": "Journal Article", "created": "2010-12-10", "title": "Forest Bioenergy Or Forest Carbon? Assessing Trade-Offs In Greenhouse Gas Mitigation With Wood-Based Fuels", "description": "The potential of forest-based bioenergy to reduce greenhouse gas (GHG) emissions when displacing fossil-based energy must be balanced with forest carbon implications related to biomass harvest. We integrate life cycle assessment (LCA) and forest carbon analysis to assess total GHG emissions of forest bioenergy over time. Application of the method to case studies of wood pellet and ethanol production from forest biomass reveals a substantial reduction in forest carbon due to bioenergy production. For all cases, harvest-related forest carbon reductions and associated GHG emissions initially exceed avoided fossil fuel-related emissions, temporarily increasing overall emissions. In the long term, electricity generation from pellets reduces overall emissions relative to coal, although forest carbon losses delay net GHG mitigation by 16-38 years, depending on biomass source (harvest residues/standing trees). Ethanol produced from standing trees increases overall emissions throughout 100 years of continuous production: ethanol from residues achieves reductions after a 74 year delay. Forest carbon more significantly affects bioenergy emissions when biomass is sourced from standing trees compared to residues and when less GHG-intensive fuels are displaced. In all cases, forest carbon dynamics are significant. Although study results are not generalizable to all forests, we suggest the integrated LCA/forest carbon approach be undertaken for bioenergy studies.", "keywords": ["Greenhouse Effect", "Ontario", "Air Pollutants", "Conservation of Natural Resources", "Ethanol", "0211 other engineering and technologies", "02 engineering and technology", "15. Life on land", "Wood", "7. Clean energy", "Carbon", "Carbon Cycle", "Trees", "12. Responsible consumption", "Models", " Chemical", "13. Climate action", "Air Pollution", "Biofuels", "11. Sustainability", "0202 electrical engineering", " electronic engineering", " information engineering", "Biomass"]}, "links": [{"href": "https://doi.org/10.1021/es1024004"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/es1024004", "name": "item", "description": "10.1021/es1024004", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/es1024004"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-12-10T00:00:00Z"}}, {"id": "10.1021/es201746b", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:05Z", "type": "Journal Article", "created": "2011-07-28", "title": "Radiative Forcing Impacts Of Boreal Forest Biofuels: A Scenario Study For Norway In Light Of Albedo", "description": "Radiative forcing impacts due to increased harvesting of boreal forests for use as transportation biofuel in Norway are quantified using simple climate models together with life cycle emission data, MODIS surface albedo data, and a dynamic land use model tracking carbon flux and clear-cut area changes within productive forests over a 100-year management period. We approximate the magnitude of radiative forcing due to albedo changes and compare it to the forcing due to changes in the carbon cycle for purposes of attributing the net result, along with changes in fossil fuel emissions, to the combined anthropogenic land use plus transport fuel system. Depending on albedo uncertainty and uncertainty about the geographic distribution of future logging activity, we report a range of results, thus only general conclusions about the magnitude of the carbon offset potential due to changes in surface albedo can be drawn. Nevertheless, our results have important implications for how forests might be managed for mitigating climate change in light of this additional biophysical criterion, and in particular, on future biofuel policies throughout the region. Future research efforts should be directed at understanding the relationships between the physical properties of managed forests and albedo, and how albedo changes in time as a result of specific management interventions.", "keywords": ["Light", "Norway", "Climate", "Climate Change", "Models", " Theoretical", "15. Life on land", "01 natural sciences", "7. Clean energy", "Carbon", "Trees", "13. Climate action", "Biofuels", "11. Sustainability", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1021/es201746b"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Science%20%26amp%3B%20Technology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1021/es201746b", "name": "item", "description": "10.1021/es201746b", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/es201746b"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-08-12T00:00:00Z"}}, {"id": "10.1038/35078060", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:18:18Z", "type": "Journal Article", "created": "2002-07-26", "title": "Limited Carbon Storage In Soil And Litter Of Experimental Forest Plots Under Increased Atmospheric Co2", "description": "The current rise in atmospheric CO2 concentration is thought to be mitigated in part by carbon sequestration within forest ecosystems, where carbon can be stored in vegetation or soils. The storage of carbon in soils is determined by the fraction that is sequestered in persistent organic materials, such as humus. In experimental forest plots of loblolly pine (Pinus taeda) exposed to high CO2 concentrations, nearly half of the carbon uptake is allocated to short-lived tissues, largely foliage. These tissues fall to the ground and decompose, normally contributing only a small portion of their carbon content to refractory soil humic materials. Such findings call into question the role of soils as long-term carbon sinks, and show the need for a better understanding of carbon cycling in forest soils. Here we report a significant accumulation of carbon in the litter layer of experimental forest plots after three years of growth at increased CO2 concentrations (565 microl l(-1)). But fast turnover times of organic carbon in the litter layer (of about three years) appear to constrain the potential size of this carbon sink. Given the observation that carbon accumulation in the deeper mineral soil layers was absent, we suggest that significant, long-term net carbon sequestration in forest soils is unlikely.", "keywords": ["Soil", "Cycadopsida", "Atmosphere", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Carbon", "Trees", "0105 earth and related environmental sciences"], "contacts": [{"organization": "William H. Schlesinger, John Lichter,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1038/35078060"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/35078060", "name": "item", "description": "10.1038/35078060", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/35078060"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2001-05-01T00:00:00Z"}}, {"id": "10.1038/nature00910", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:19Z", "type": "Journal Article", "created": "2002-09-18", "title": "Ecosystem Carbon Loss With Woody Plant Invasion Of Grasslands", "description": "The invasion of woody vegetation into deserts, grasslands and savannas is generally thought to lead to an increase in the amount of carbon stored in those ecosystems. For this reason, shrub and forest expansion (for example, into grasslands) is also suggested to be a substantial, if uncertain, component of the terrestrial carbon sink. Here we investigate woody plant invasion along a precipitation gradient (200 to 1,100 mm yr(-1)) by comparing carbon and nitrogen budgets and soil delta(13)C profiles between six pairs of adjacent grasslands, in which one of each pair was invaded by woody species 30 to 100 years ago. We found a clear negative relationship between precipitation and changes in soil organic carbon and nitrogen content when grasslands were invaded by woody vegetation, with drier sites gaining, and wetter sites losing, soil organic carbon. Losses of soil organic carbon at the wetter sites were substantial enough to offset increases in plant biomass carbon, suggesting that current land-based assessments may overestimate carbon sinks. Assessments relying on carbon stored from woody plant invasions to balance emissions may therefore be incorrect.", "keywords": ["Soil", "Nitrogen", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "04 agricultural and veterinary sciences", "15. Life on land", "Poaceae", "Wood", "Carbon", "Ecosystem", "Trees"]}, "links": [{"href": "https://doi.org/10.1038/nature00910"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/nature00910", "name": "item", "description": "10.1038/nature00910", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/nature00910"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-08-01T00:00:00Z"}}, {"id": "10.1038/ismej.2012.113", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:19Z", "type": "Journal Article", "created": "2012-11-15", "title": "Pre-Exposure To Drought Increases The Resistance Of Tropical Forest Soil Bacterial Communities To Extended Drought", "description": "Abstract

Global climate models project a decrease in the magnitude of precipitation in tropical regions. Changes in rainfall patterns have important implications for the moisture content and redox status of tropical soils, yet little is known about how these changes may affect microbial community structure. Specifically, does exposure to prior stress confer increased resistance to subsequent perturbation? Here we reduced the quantity of precipitation throughfall to tropical forest soils in the Luquillo Mountains, Puerto Rico. Treatments included newly established throughfall exclusion plots (de novo excluded), plots undergoing reduction for a second time (pre-excluded) and ambient control plots. Ten months of throughfall exclusion led to a small but statistically significant decline in soil water potential and bacterial populations clearly adapted to increased osmotic stress. Although the water potential decline was small and microbial biomass did not change, phylogenetic diversity in the de novo-excluded plots decreased by \uffe2\uff88\uffbc40% compared with the control plots, yet pre-excluded plots showed no significant change. On the other hand, the relative abundances of bacterial taxa in both the de novo-excluded and pre-excluded plots changed significantly with throughfall exclusion compared with control plots. Changes in bacterial community structure could be explained by changes in soil pore water chemistry and suggested changes in soil redox. Soluble iron declined in treatment plots and was correlated with decreased soluble phosphorus concentrations, which may have significant implications for microbial productivity in these P-limited systems.

", "keywords": ["0301 basic medicine", "2. Zero hunger", "Tropical Climate", "0303 health sciences", "Bacteria", "Rain", "Puerto Rico", "Water", "Phosphorus", "15. Life on land", "6. Clean water", "Droughts", "Trees", "Soil", "03 medical and health sciences", "13. Climate action", "Biomass", "Phylogeny", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1038/ismej.2012.113"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/The%20ISME%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/ismej.2012.113", "name": "item", "description": "10.1038/ismej.2012.113", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/ismej.2012.113"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-11-15T00:00:00Z"}}, {"id": "10.1038/nature00910,", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:19Z", "type": "Journal Article", "created": "2002-09-18", "title": "Ecosystem Carbon Loss With Woody Plant Invasion Of Grasslands", "description": "The invasion of woody vegetation into deserts, grasslands and savannas is generally thought to lead to an increase in the amount of carbon stored in those ecosystems. For this reason, shrub and forest expansion (for example, into grasslands) is also suggested to be a substantial, if uncertain, component of the terrestrial carbon sink. Here we investigate woody plant invasion along a precipitation gradient (200 to 1,100 mm yr(-1)) by comparing carbon and nitrogen budgets and soil delta(13)C profiles between six pairs of adjacent grasslands, in which one of each pair was invaded by woody species 30 to 100 years ago. We found a clear negative relationship between precipitation and changes in soil organic carbon and nitrogen content when grasslands were invaded by woody vegetation, with drier sites gaining, and wetter sites losing, soil organic carbon. Losses of soil organic carbon at the wetter sites were substantial enough to offset increases in plant biomass carbon, suggesting that current land-based assessments may overestimate carbon sinks. Assessments relying on carbon stored from woody plant invasions to balance emissions may therefore be incorrect.", "keywords": ["Soil", "Nitrogen", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "04 agricultural and veterinary sciences", "15. Life on land", "Poaceae", "Wood", "Carbon", "Ecosystem", "Trees"]}, "links": [{"href": "https://doi.org/10.1038/nature00910,"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/nature00910,", "name": "item", "description": "10.1038/nature00910,", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/nature00910,"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-08-01T00:00:00Z"}}, {"id": "10.1038/nature01051", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:19Z", "type": "Journal Article", "created": "2002-10-30", "title": "Quantifying Nitrogen-Fixation In Feather Moss Carpets Of Boreal Forests", "description": "Biological nitrogen (N) fixation is the primary source of N within natural ecosystems, yet the origin of boreal forest N has remained elusive. The boreal forests of Eurasia and North America lack any significant, widespread symbiotic N-fixing plants. With the exception of scattered stands of alder in early primary successional forests, N-fixation in boreal forests is considered to be extremely limited. Nitrogen-fixation in northern European boreal forests has been estimated at only 0.5 kg N ha(-1) yr(-1); however, organic N is accumulated in these ecosystems at a rate of 3 kg N ha(-1) yr(-1) (ref. 8). Our limited understanding of the origin of boreal N is unacceptable given the extent of the boreal forest region, but predictable given our imperfect knowledge of N-fixation. Herein we report on a N-fixing symbiosis between a cyanobacterium (Nostoc sp.) and the ubiquitous feather moss, Pleurozium schreberi (Bird) Mitt. that alone fixes between 1.5 and 2.0 kg N ha(-1) yr(-1) in mid- to late-successional forests of northern Scandinavia and Finland. Previous efforts have probably underestimated N-fixation potential in boreal forests.", "keywords": ["Sweden", "0106 biological sciences", "Acetylene", "Norway", "04 agricultural and veterinary sciences", "15. Life on land", "Cyanobacteria", "01 natural sciences", "Bryopsida", "Trees", "Plant Leaves", "Kinetics", "Nitrogen Fixation", "0401 agriculture", " forestry", " and fisheries", "Symbiosis", "Finland"]}, "links": [{"href": "https://doi.org/10.1038/nature01051"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/nature01051", "name": "item", "description": "10.1038/nature01051", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/nature01051"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-10-31T00:00:00Z"}}, {"id": "10.1038/nature02047", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:18:19Z", "type": "Journal Article", "created": "2003-10-15", "title": "Reduction Of Soil Carbon Formation By Tropospheric Ozone Under Increased Carbon Dioxide Levels", "description": "In the Northern Hemisphere, ozone levels in the troposphere have increased by 35 per cent over the past century, with detrimental impacts on forest and agricultural productivity, even when forest productivity has been stimulated by increased carbon dioxide levels. In addition to reducing productivity, increased tropospheric ozone levels could alter terrestrial carbon cycling by lowering the quantity and quality of carbon inputs to soils. However, the influence of elevated ozone levels on soil carbon formation and decomposition are unknown. Here we examine the effects of elevated ozone levels on the formation rates of total and decay-resistant acid-insoluble soil carbon under conditions of elevated carbon dioxide levels in experimental aspen (Populus tremuloides) stands and mixed aspen-birch (Betula papyrifera) stands. With ambient concentrations of ozone and carbon dioxide both raised by 50 per cent, we find that the formation rates of total and acid-insoluble soil carbon are reduced by 50 per cent relative to the amounts entering the soil when the forests were exposed to increased carbon dioxide alone. Our results suggest that, in a world with elevated atmospheric carbon dioxide concentrations, global-scale reductions in plant productivity due to elevated ozone levels will also lower soil carbon formation rates significantly.", "keywords": ["2. Zero hunger", "Atmosphere", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Carbon", "Trees", "Soil", "Ozone", "Populus", "Solubility", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Acids", "Betula", "Ecosystem", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Noah J. Karberg, Kurt S. Pregitzer, Christian P. Giardina, John S. King, Wendy M. Loya,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1038/nature02047"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/nature02047", "name": "item", "description": "10.1038/nature02047", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/nature02047"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2003-10-01T00:00:00Z"}}, {"id": "10.1038/ncomms6612", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:20Z", "type": "Journal Article", "created": "2014-11-26", "title": "Afforestation Or Intense Pasturing Improve The Ecological And Economic Value Of Abandoned Tropical Farmlands", "description": "Abstract

Increasing demands for livelihood resources in tropical rural areas have led to progressive clearing of biodiverse natural forests. Restoration of abandoned farmlands could counter this process. However, as aims and modes of restoration differ in their ecological and socio-economic value, the assessment of achievable ecosystem functions and benefits requires holistic investigation. Here we combine the results from multidisciplinary research for a unique assessment based on a normalization of 23 ecological, economic and social indicators for four restoration options in the tropical Andes of Ecuador. A comparison of the outcomes among afforestation with native alder or exotic pine, pasture restoration with either low-input or intense management and the abandoned status quo shows that both variants of afforestation and intense pasture use improve the ecological value, but low-input pasture does not. Economic indicators favour either afforestation or intense pasturing. Both Mestizo and indigenous Saraguro settlers are more inclined to opt for afforestation.

", "keywords": ["Conservation of Natural Resources", "Restoration ecology", "01 natural sciences", "Article", "Environmental science", "Trees", "Agricultural and Biological Sciences", "Livelihood", "Afforestation", "Agroforestry Systems and Biodiversity Enhancement", "ddc:630", "Ecosystem services", "Pasture", "Agroforestry", "Tropical Deforestation", "Biology", "Ecosystem", "0105 earth and related environmental sciences", "2. Zero hunger", "Global and Planetary Change", "Global Analysis of Ecosystem Services and Land Use", "Geography", "Ecology", "1. No poverty", "Life Sciences", "Forestry", "Agriculture", "Biodiversity", "04 agricultural and veterinary sciences", "15. Life on land", "Pinus", "ddc:", "FOS: Biological sciences", "Environmental Science", "Physical Sciences", "0401 agriculture", " forestry", " and fisheries", "Ecuador", "Drivers and Impacts of Tropical Deforestation"]}, "links": [{"href": "https://doi.org/10.1038/ncomms6612"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/ncomms6612", "name": "item", "description": "10.1038/ncomms6612", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/ncomms6612"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-11-26T00:00:00Z"}}, {"id": "10.1038/s41396-022-01193-z", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:18:21Z", "type": "Journal Article", "created": "2022-01-18", "title": "Ectomycorrhizal fungi mediate belowground carbon transfer between pines and oaks", "description": "Abstract

Inter-kingdom belowground carbon (C) transfer is a significant, yet hidden, biological phenomenon, due to the complexity and highly dynamic nature of soil ecology. Among key biotic agents influencing C allocation belowground are ectomycorrhizal fungi (EMF). EMF symbiosis can extend beyond the single tree-fungus partnership to form common mycorrhizal networks (CMNs). Despite the high prevalence of CMNs in forests, little is known about the identity of the EMF transferring the C and how these in turn affect the dynamics of C transfer. Here, Pinus halepensis and Quercus calliprinos saplings growing in forest soil were labeled using a 13CO2 labeling system. Repeated samplings were applied during 36 days to trace how 13C was distributed along the tree-fungus-tree pathway. To identify the fungal species active in the transfer, mycorrhizal fine root tips were used for DNA-stable isotope probing (SIP) with 13CO2 followed by sequencing of labeled DNA. Assimilated 13CO2 reached tree roots within four days and was then transferred to various EMF species. C was transferred across all four tree species combinations. While Tomentella ellisii was the primary fungal mediator between pines and oaks, Terfezia pini, Pustularia spp., and Tuber oligospermum controlled C transfer among pines. We demonstrate at a high temporal, quantitative, and taxonomic resolution, that C from EMF host trees moved into EMF and that C was transferred further to neighboring trees of similar and distinct phylogenies.

", "keywords": ["0301 basic medicine", "Quercus", "Soil", "0303 health sciences", "03 medical and health sciences", "Mycorrhizae", "Carbon Dioxide", "15. Life on land", "Plant Roots", "Carbon", "Trees"]}, "links": [{"href": "https://www.nature.com/articles/s41396-022-01193-z.pdf"}, {"href": "https://doi.org/10.1038/s41396-022-01193-z"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/The%20ISME%20Journal", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41396-022-01193-z", "name": "item", "description": "10.1038/s41396-022-01193-z", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41396-022-01193-z"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-18T00:00:00Z"}}, {"id": "10.1038/s41467-019-08348-1", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:22Z", "type": "Journal Article", "created": "2019-02-14", "title": "Decadal biomass increment in early secondary succession woody ecosystems is increased by CO2 enrichment", "description": "Abstract

Increasing atmospheric CO2 stimulates photosynthesis which can increase net primary production (NPP), but at longer timescales may not necessarily increase plant biomass. Here we analyse the four decade-long CO2-enrichment experiments in woody ecosystems that measured total NPP and biomass. CO2 enrichment increased biomass increment by 1.05\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff890.26\uffe2\uff80\uff89kg\uffe2\uff80\uff89C\uffe2\uff80\uff89m\uffe2\uff88\uff922 over a full decade, a 29.1\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff8911.7% stimulation of biomass gain in these early-secondary-succession temperate ecosystems. This response is predictable by combining the CO2 response of NPP (0.16\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff890.03\uffe2\uff80\uff89kg\uffe2\uff80\uff89C\uffe2\uff80\uff89m\uffe2\uff88\uff922\uffe2\uff80\uff89y\uffe2\uff88\uff921) and the CO2-independent, linear slope between biomass increment and cumulative NPP (0.55\uffe2\uff80\uff89\uffc2\uffb1\uffe2\uff80\uff890.17). An ensemble of terrestrial ecosystem models fail to predict both terms correctly. Allocation to wood was a driver of across-site, and across-model, response variability and together with CO2-independence of biomass retention highlights the value of understanding drivers of wood allocation under ambient conditions to\uffc2\uffa0correctly interpret\uffc2\uffa0and predict CO2 responses.

", "keywords": ["[SDE] Environmental Sciences", "0106 biological sciences", "0301 basic medicine", "TREE MORTALITY", "550", "Climate", "Plant Biology", "Biochemistry", "01 natural sciences", "Trees", "atmospheric carbon dioxide", "ddc:550", "Biomass", "Photosynthesis", "Ecology", "Q", "FOREST PRODUCTIVITY", "Forestry", "Biological Sciences", "woody", "decadal biomass", "Wood", "[SDE]Environmental Sciences", "GROWTH", "ecosystems", "CARBON ALLOCATION", "570", "Science", "Biophysics", "333", "SWEETGUM PLANTATION", "Article", "03 medical and health sciences", "XXXXXX - Unknown", "forest ecology", "plant biomass", "Biochemistry", " Biophysics", " and Structural Biology", "Ecosystem", "photosynthesis", "Carbon Dioxide", "15. Life on land", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "NITROGEN", "CLIMATE", "13. Climate action", "and Structural Biology", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "ELEVATED CO2", "SOIL CARBON", "RESPONSES"]}, "links": [{"href": "https://www.nature.com/articles/s41467-019-08348-1.pdf"}, {"href": "https://arrow.tudublin.ie/context/scschbioart/article/1214/viewcontent/nature.pdf"}, {"href": "https://escholarship.org/content/qt5m5806sh/qt5m5806sh.pdf"}, {"href": "https://doi.org/10.1038/s41467-019-08348-1"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41467-019-08348-1", "name": "item", "description": "10.1038/s41467-019-08348-1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41467-019-08348-1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-02-14T00:00:00Z"}}, {"id": "10.1038/s41467-019-12976-y", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:22Z", "type": "Journal Article", "created": "2019-11-01", "title": "Seasonal dynamics of stem N2O exchange follow the physiological activity of boreal trees", "description": "Abstract

The role of trees in the nitrous oxide (N2O) balance of boreal forests has been neglected despite evidence suggesting their substantial contribution. We measured seasonal changes in N2O fluxes from soil and stems of boreal trees in Finland, showing clear seasonality in stem N2O flux following tree physiological activity, particularly processes of CO2 uptake and release. Stem N2O emissions peak during\uffc2\uffa0the vegetation season, decrease rapidly in October, and remain low but significant to the annual totals during winter dormancy. Trees growing on dry soils even turn to consumption of\uffc2\uffa0N2O from the atmosphere during dormancy, thereby reducing their overall N2O emissions. At an\uffc2\uffa0annual scale, pine, spruce and birch are net N2O sources, with spruce being the strongest emitter. Boreal trees thus markedly contribute to the seasonal dynamics of ecosystem N2O exchange, and their species-specific contribution should be included into forest emission inventories.

", "keywords": ["EDDY COVARIANCE", "Science", "Nitrous Oxide", "NITROUS-OXIDE EMISSIONS", "Article", "CO2 EXCHANGE", "Trees", "CARBON-DIOXIDE", "Soil", "METHANE", "Taiga", "CH4 EMISSIONS", "SCOTS PINE", "Ecosystem", "Finland", "Plant Stems", "Atmosphere", "Q", "Forestry", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "FOREST", "Environmental sciences", "SOIL", "PLANT-GROWTH", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Seasons", "Methane"]}, "links": [{"href": "https://www.nature.com/articles/s41467-019-12976-y.pdf"}, {"href": "https://doi.org/10.1038/s41467-019-12976-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41467-019-12976-y", "name": "item", "description": "10.1038/s41467-019-12976-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41467-019-12976-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-11-01T00:00:00Z"}}, {"id": "10.1038/s41467-024-50245-9", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:23Z", "type": "Journal Article", "created": "2024-07-17", "title": "The impact of insect herbivory on biogeochemical cycling in broadleaved forests varies with temperature", "description": "Abstract

Herbivorous insects alter biogeochemical cycling within forests, but the magnitude of these impacts, their global variation, and drivers of this variation remain poorly understood. To address this knowledge gap and help improve biogeochemical models, we established a global network of 74 plots within 40 mature, undisturbed broadleaved forests. We analyzed freshly senesced and green leaves for carbon, nitrogen, phosphorus and silica concentrations, foliar production and herbivory, and stand-level nutrient fluxes. We show more nutrient release by insect herbivores at non-outbreak levels in tropical forests than temperate and boreal forests, that these fluxes increase strongly with mean annual temperature, and that they exceed atmospheric deposition inputs in some localities. Thus, background levels of insect herbivory are sufficiently large to both alter ecosystem element cycling and influence terrestrial carbon cycling. Further, climate can affect interactions between natural populations of plants and herbivores with important consequences for global biogeochemical cycles across broadleaved forests.Forests play a key role in the carbon cycle as they store huge quantities of organic carbon, most of which is stored in soils, with a smaller part being held in vegetation. While the carbon storage capacity of forests is influenced by forestry, the long-term impacts of forest managers\uffe2\uff80\uff99 decisions on soil organic carbon (SOC) remain unclear. Using a meta-analysis approach, we showed that conventional biomass harvests preserved the SOC of forests, unlike intensive harvests where logging residues were harvested to produce fuelwood. Conventional harvests caused a decrease in carbon storage in the forest floor, but when the whole soil profile was taken into account, we found that this loss in the forest floor was compensated by an accumulation of SOC in deeper soil layers. Conversely, we found that intensive harvests led to SOC losses in all layers of forest soils. We assessed the potential impact of intensive harvests on the carbon budget, focusing on managed European forests. Estimated carbon losses from forest soils suggested that intensive biomass harvests could constitute an important source of carbon transfer from forests to the atmosphere (142\uffe2\uff80\uff93497 Tg-C), partly neutralizing the role of a carbon sink played by forest soils.

", "keywords": ["2. Zero hunger", "0106 biological sciences", "Carbon Sequestration", "[SDE.MCG]Environmental Sciences/Global Changes", "Forestry", "04 agricultural and veterinary sciences", "Forests", "15. Life on land", "forest soil", "01 natural sciences", "Article", "Carbon", "Carbon Cycle", "Trees", "[SDE.MCG] Environmental Sciences/Global Changes", "Soil", "13. Climate action", "carbone organique du sol", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Milieux et Changements globaux", "sol forestier", "Ecosystem", "Environmental Monitoring"]}, "links": [{"href": "https://hal.science/hal-01594440/file/2015_Achat_Scientific%20Reports_1.pdf"}, {"href": "https://doi.org/10.1038/srep15991"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Scientific%20Reports", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/srep15991", "name": "item", "description": "10.1038/srep15991", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep15991"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-11-04T00:00:00Z"}}, {"id": "10.1039/c2em30410d", "type": "Feature", "geometry": null, "properties": {"license": "Closed Access", "updated": "2026-06-24T16:18:29Z", "type": "Journal Article", "created": "2012-07-07", "title": "Soil Organic Carbon Sequestration As Affected By Afforestation: The Darab Kola Forest (North Of Iran) Case Study", "description": "Following the ratification of the Kyoto Protocol, afforestation of formerly arable lands and/or degraded areas has been acknowledged as a land-use change contributing to the mitigation of increasing atmospheric CO(2) concentration in the atmosphere. In the present work, we study the soil organic carbon sequestration (SOCS) in 21 year old stands of maple (Acer velutinum Bioss.), oak (Quercus castaneifolia C.A. Mey.), and red pine (Pinus brutia Ten.) in the Darab Kola region, north of Iran. Soil samples were collected at four different depths (0-10, 10-20, 20-30, and 30-40 cm), and characterized with respect to bulk density, water content, electrical conductivity, pH, texture, lime content, total organic C, total N, and earthworm density and biomass. Data showed that afforested stands significantly affected soil characteristics, also raising SOCS phenomena, with values of 163.3, 120.6, and 102.1 Mg C ha(-1) for red pine, oak and maple stands, respectively, vs. 83.0 Mg C ha(-1) for the control region. Even if the dynamics of organic matter (OM) in soil is very complex and affected by several pedo-climatic factors, a stepwise regression method indicates that SOCS values in the studied area could be predicted using the following parameters, i.e., sand, clay, lime, and total N contents, and C/N ratio. In particular, although the chemical and physical stabilization capacity of organic C by soil is believed to be mainly governed by clay content, regression analysis showed a positive correlation between SOCS and sand (R = 0.86(**)), whereas a negative correlation with clay (R = -0.77(**)) was observed, thus suggesting that most of this organic C occurs as particulate OM instead of mineral-associated OM. Although the proposed models do not take into account possible changes due to natural and anthropogenic processes, they represent a simple way that could be used to evaluate and/or monitor the potential of each forest plantation in immobilizing organic C in soil (thus reducing atmospheric C concentration), as well as to select more appropriate species during forestation plan management at least in the north of Iran.", "keywords": ["2. Zero hunger", "Carbon Sequestration", "Nitrogen", "Carbon sequestration; soils; afforestation; Iran", "Forestry", "04 agricultural and veterinary sciences", "Iran", "15. Life on land", "Carbon", "6. Clean water", "Trees", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1039/c2em30410d"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Environmental%20Monitoring", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1039/c2em30410d", "name": "item", "description": "10.1039/c2em30410d", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1039/c2em30410d"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-01-01T00:00:00Z"}}, {"id": "10.1073/pnas.0706518104", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2007-08-21", "title": "Increases In Nitrogen Uptake Rather Than Nitrogen-Use Efficiency Support Higher Rates Of Temperate Forest Productivity Under Elevated Co2", "description": "

Forest ecosystems are important sinks for rising concentrations of atmospheric CO 2 . In previous research, we showed that net primary production (NPP) increased by 23 \uffc2\uffb1 2% when four experimental forests were grown under atmospheric concentrations of CO 2 predicted for the latter half of this century. Because nitrogen (N) availability commonly limits forest productivity, some combination of increased N uptake from the soil and more efficient use of the N already assimilated by trees is necessary to sustain the high rates of forest NPP under free-air CO 2 enrichment (FACE). In this study, experimental evidence demonstrates that the uptake of N increased under elevated CO 2 at the Rhinelander, Duke, and Oak Ridge National Laboratory FACE sites, yet fertilization studies at the Duke and Oak Ridge National Laboratory FACE sites showed that tree growth and forest NPP were strongly limited by N availability. By contrast, nitrogen-use efficiency increased under elevated CO 2 at the POP-EUROFACE site, where fertilization studies showed that N was not limiting to tree growth. Some combination of increasing fine root production, increased rates of soil organic matter decomposition, and increased allocation of carbon (C) to mycorrhizal fungi is likely to account for greater N uptake under elevated CO 2 . Regardless of the specific mechanism, this analysis shows that the larger quantities of C entering the below-ground system under elevated CO 2 result in greater N uptake, even in N-limited ecosystems. Biogeochemical models must be reformulated to allow C transfers below ground that result in additional N uptake under elevated CO 2 .

", "keywords": ["rotation poplar plantation", "0106 biological sciences", "Nitrogen", "Climate", "atmospheric carbon-dioxide", "enrichment face", "organic nitrogen", "Biological Transport", "deciduous forest", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Trees", "Kinetics", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "populus-tremuloides", "community composition", "soil-n availability", "fine-root production", "Ecosystem", "ecosystem responses"]}, "links": [{"href": "https://doi.org/10.1073/pnas.0706518104"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.0706518104", "name": "item", "description": "10.1073/pnas.0706518104", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.0706518104"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2007-08-28T00:00:00Z"}}, {"id": "10.1073/pnas.1018189108", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2011-05-24", "title": "Soil Warming, Carbon-Nitrogen Interactions, And Forest Carbon Budgets", "description": "

Soil warming has the potential to alter both soil and plant processes that affect carbon storage in forest ecosystems. We have quantified these effects in a large, long-term (7-y) soil-warming study in a deciduous forest in New England. Soil warming has resulted in carbon losses from the soil and stimulated carbon gains in the woody tissue of trees. The warming-enhanced decay of soil organic matter also released enough additional inorganic nitrogen into the soil solution to support the observed increases in plant carbon storage. Although soil warming has resulted in a cumulative net loss of carbon from a New England forest relative to a control area over the 7-y study, the annual net losses generally decreased over time as plant carbon storage increased. In the seventh year, warming-induced soil carbon losses were almost totally compensated for by plant carbon gains in response to warming. We attribute the plant gains primarily to warming-induced increases in nitrogen availability. This study underscores the importance of incorporating carbon\uffe2\uff80\uff93nitrogen interactions in atmosphere\uffe2\uff80\uff93ocean\uffe2\uff80\uff93land earth system models to accurately simulate land feedbacks to the climate system.

", "keywords": ["Atmosphere", "Nitrogen", "Temperature", "Plant Development", "04 agricultural and veterinary sciences", "Plants", "15. Life on land", "Models", " Biological", "Plant Roots", "01 natural sciences", "Carbon", "Trees", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Ecosystem", "Soil Microbiology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1073/pnas.1018189108"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.1018189108", "name": "item", "description": "10.1073/pnas.1018189108", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.1018189108"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-05-23T00:00:00Z"}}, {"id": "10.1073/pnas.0403491101", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2004-06-22", "title": "Fine-Root Production Dominates Response Of A Deciduous Forest To Atmospheric Co2 Enrichment", "description": "

Fine-root production and turnover are important regulators of the biogeochemical cycles of ecosystems and key components of their response to global change. We present a nearly continuous 6-year record of fine-root production and mortality from minirhizotron analysis of a closed-canopy, deciduous sweetgum forest in a free-air CO 2 enrichment experiment. Annual production of fine roots was more than doubled in plots with 550 ppm CO 2 compared with plots in ambient air. This response was the primary component of the sustained 22% increase in net primary productivity. Annual fine-root mortality matched annual production, and the mean residence time of roots was not altered by elevated CO 2 , but peak fine-root standing crop in midsummer was significantly higher in CO 2 -enriched plots, especially deeper in the soil profile. The preferential allocation of additional carbon to fine roots, which have a fast turnover rate in this species, rather than to stemwood reduces the possibility of long-term enhancement by elevated CO 2 of carbon sequestration in biomass. However, sequestration of some of the fine-root carbon in soil pools is not precluded, and there may be other benefits to the tree from a seasonally larger and deeper fine-root system. Root-system dynamics can explain differences among ecosystems in their response to elevated atmospheric CO 2 ; hence, accurate assessments of carbon flux and storage in forests in a globally changing atmosphere must account for this unseen and difficult-to-measure component.

", "keywords": ["0106 biological sciences", "Time Factors", "Atmosphere", "Nitrogen", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "Plant Roots", "Tennessee", "01 natural sciences", "Trees", "Soil", "Liquidambar", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Seasons", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1073/pnas.0403491101"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.0403491101", "name": "item", "description": "10.1073/pnas.0403491101", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.0403491101"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-06-21T00:00:00Z"}}, {"id": "10.1073/pnas.0600989103", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2006-06-23", "title": "Nutrient Additions To A Tropical Rain Forest Drive Substantial Soil Carbon Dioxide Losses To The Atmosphere", "description": "

Terrestrial biosphere\uffe2\uff80\uff93atmosphere carbon dioxide (CO 2 ) exchange is dominated by tropical forests, where photosynthetic carbon (C) uptake is thought to be phosphorus (P)-limited. In P-poor tropical forests, P may also limit organic matter decomposition and soil C losses. We conducted a field-fertilization experiment to show that P fertilization stimulates soil respiration in a lowland tropical rain forest in Costa Rica. In the early wet season, when soluble organic matter inputs to soil are high, P fertilization drove large increases in soil respiration. Although the P-stimulated increase in soil respiration was largely confined to the dry-to-wet season transition, the seasonal increase was sufficient to drive an 18% annual increase in CO 2 efflux from the P-fertilized plots. Nitrogen (N) fertilization caused similar responses, and the net increases in soil respiration in response to the additions of N and P approached annual soil C fluxes in mid-latitude forests. Human activities are altering natural patterns of tropical soil N and P availability by land conversion and enhanced atmospheric deposition. Although our data suggest that the mechanisms driving the observed respiratory responses to increased N and P may be different, the large CO 2 losses stimulated by N and P fertilization suggest that knowledge of such patterns and their effects on soil CO 2 efflux is critical for understanding the role of tropical forests in a rapidly changing global C cycle.

", "keywords": ["2. Zero hunger", "Tropical Climate", "Atmosphere", "Temperature", "Humidity", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "Plant Roots", "Trees", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Nutritional Physiological Phenomena", "Biomass", "Seasons", "Fertilizers"]}, "links": [{"href": "https://doi.org/10.1073/pnas.0600989103"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.0600989103", "name": "item", "description": "10.1073/pnas.0600989103", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.0600989103"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2006-07-05T00:00:00Z"}}, {"id": "10.1073/pnas.1220608110", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2012-12-28", "title": "Conversion Of The Amazon Rainforest To Agriculture Results In Biotic Homogenization Of Soil Bacterial Communities", "description": "

The Amazon rainforest is the Earth\uffe2\uff80\uff99s largest reservoir of plant and animal diversity, and it has been subjected to especially high rates of land use change, primarily to cattle pasture. This conversion has had a strongly negative effect on biological diversity, reducing the number of plant and animal species and homogenizing communities. We report here that microbial biodiversity also responds strongly to conversion of the Amazon rainforest, but in a manner different from plants and animals. Local taxonomic and phylogenetic diversity of soil bacteria increases after conversion, but communities become more similar across space. This homogenization is driven by the loss of forest soil bacteria with restricted ranges (endemics) and results in a net loss of diversity. This study shows homogenization of microbial communities in response to human activities. Given that soil microbes represent the majority of biodiversity in terrestrial ecosystems and are intimately involved in ecosystem functions, we argue that microbial biodiversity loss should be taken into account when assessing the impact of land use change in tropical forests.

", "keywords": ["0301 basic medicine", "2. Zero hunger", "Tropical Climate", "0303 health sciences", "Bacteria", "Rain", "Agriculture", "Biodiversity", "15. Life on land", "Trees", "03 medical and health sciences", "13. Climate action", "Animals", "Humans", "Cattle", "Brazil", "Ecosystem", "Phylogeny", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1073/pnas.1220608110"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.1220608110", "name": "item", "description": "10.1073/pnas.1220608110", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.1220608110"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-12-27T00:00:00Z"}}, {"id": "10.1073/pnas.1006463107", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2010-10-26", "title": "Co2 Enhancement Of Forest Productivity Constrained By Limited Nitrogen Availability", "description": "

Stimulation of terrestrial plant production by rising CO 2 concentration is projected to reduce the airborne fraction of anthropogenic CO 2 emissions. Coupled climate\uffe2\uff80\uff93carbon cycle models are sensitive to this negative feedback on atmospheric CO 2 , but model projections are uncertain because of the expectation that feedbacks through the nitrogen (N) cycle will reduce this so-called CO 2 fertilization effect. We assessed whether N limitation caused a reduced stimulation of net primary productivity (NPP) by elevated atmospheric CO 2 concentration over 11 y in a free-air CO 2 enrichment (FACE) experiment in a deciduous Liquidambar styraciflua (sweetgum) forest stand in Tennessee. During the first 6 y of the experiment, NPP was significantly enhanced in forest plots exposed to 550 ppm CO 2 compared with NPP in plots in current ambient CO 2 , and this was a consistent and sustained response. However, the enhancement of NPP under elevated CO 2 declined from 24% in 2001\uffe2\uff80\uff932003 to 9% in 2008. Global analyses that assume a sustained CO 2 fertilization effect are no longer supported by this FACE experiment. N budget analysis supports the premise that N availability was limiting to tree growth and declining over time \uffe2\uff80\uff94an expected consequence of stand development, which was exacerbated by elevated CO 2 . Leaf- and stand-level observations provide mechanistic evidence that declining N availability constrained the tree response to elevated CO 2 ; these observations are consistent with stand-level model projections. This FACE experiment provides strong rationale and process understanding for incorporating N limitation and N feedback effects in ecosystem and global models used in climate change assessments.

", "keywords": ["580", "0106 biological sciences", "Nitrogen", "carbon dioxide", "Carbon Dioxide", "15. Life on land", "Tennessee", "01 natural sciences", "nitrogen", "climatic changes", "Trees", "forests and forestry", "13. Climate action", "Fertilization", "XXXXXX - Unknown", "Ecosystem", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1073/pnas.1006463107"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.1006463107", "name": "item", "description": "10.1073/pnas.1006463107", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.1006463107"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-25T00:00:00Z"}}, {"id": "10.1073/pnas.1016774108", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2011-03-29", "title": "Geographic bias of field observations of soil carbon stocks with tropical land-use changes precludes spatial extrapolation", "description": "

Accurately quantifying changes in soil carbon (C) stocks with land-use change is important for estimating the anthropogenic fluxes of greenhouse gases to the atmosphere and for implementing policies such as REDD (Reducing Emissions from Deforestation and Degradation) that provide financial incentives to reduce carbon dioxide fluxes from deforestation and land degradation. Despite hundreds of field studies and at least a dozen literature reviews, there is still considerable disagreement on the direction and magnitude of changes in soil C stocks with land-use change. We conducted a meta-analysis of studies that quantified changes in soil C stocks with land use in the tropics. Conversion from one land use to another caused significant increases or decreases in soil C stocks for 8 of the 14 transitions examined. For the three land-use transitions with sufficient observations, both the direction and magnitude of the change in soil C pools depended strongly on biophysical factors of mean annual precipitation and dominant soil clay mineralogy. When we compared the distribution of biophysical conditions of the field observations to the area-weighted distribution of those factors in the tropics as a whole or the tropical lands that have undergone conversion, we found that field observations are highly unrepresentative of most tropical landscapes. Because of this geographic bias we strongly caution against extrapolating average values of land-cover change effects on soil C stocks, such as those generated through meta-analysis and literature reviews, to regions that differ in biophysical conditions.

", "keywords": ["2. Zero hunger", "Conservation of Natural Resources", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "Trees"]}, "links": [{"href": "https://doi.org/10.1073/pnas.1016774108"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.1016774108", "name": "item", "description": "10.1073/pnas.1016774108", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.1016774108"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-03-28T00:00:00Z"}}, {"id": "10.1073/pnas.1320585111", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:18:44Z", "type": "Journal Article", "created": "2014-08-19", "title": "Effect Of Woody-Plant Encroachment On Livestock Production In North And South America", "description": "Significance

Grasslands all over the world are undergoing a rapid shift from herbaceous to woody-plant dominance, a phenomenon known as woody-plant encroachment. The impact of this global phenomenon on livestock production (LP), the main ecosystem service provided by grasslands, remains largely unexplored. We quantified, for the first time, the impact of woody-plant encroachment on LP at a large scale, finding a reduction of between 0.6 and 1.6 reproductive cows per square kilometer for each 1% increase in tree cover. By comparing the largest rangelands of the Americas (United States and Argentina), we also showed how the impact of woody-plant encroachment is mediated by social\uffe2\uff80\uff93economic factors. Our paper represents a significant advance in our understanding of grasslands as complex social\uffe2\uff80\uff93ecological systems.

", "keywords": ["0106 biological sciences", "2. Zero hunger", "Conservation of Natural Resources", "Livestock", "Climate", "Argentina", "15. Life on land", "Poaceae", "01 natural sciences", "333", "United States", "Trees", "13. Climate action", "Animals", "Cattle", "Ecosystem", "Environmental Monitoring", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1073/pnas.1320585111"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.1320585111", "name": "item", "description": "10.1073/pnas.1320585111", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.1320585111"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-08-18T00:00:00Z"}}, {"id": "10.1079/9780851994512.0367", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:45Z", "created": "2009-11-16", "title": "The Impact Of Rubber On The Forest Landscape In Borneo.", "description": "Rubber is the most widespread smallholder tree crop in Southeast Asia. Some analysts have blamed the expansion of rubber for greatly contributing to the conversion of mature tropical forest in both Indonesia and Malaysia. The paper critically examines to what extent smallholder rubber production actually led to forest conversion in West Kalimantan (Indonesia) and neighbouring Sarawak (Malaysia). The paper concludes that the introduction of rubber in West Kalimantan contributed little to encroachment into primary forest. Rather, it apparently favoured the restoration of forests in areas where land use became less intensive. This happens only where specific conditions in the local context allowed this to take place. The findings suggest that tree technologies should be preferred when trying to improve local agriculture. Incorporation of local resource management technologies, especially tree planting or forest management technologies, may enhance positive outcomes in terms of increased income and forest preservation.", "keywords": ["small farms", "2. Zero hunger", "rubber plants", "afforestation", "technology", "15. Life on land", "plantations", "shifting cultivation", "forest trees"], "contacts": [{"organization": "Jong, W. de", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1079/9780851994512.0367"}, {"rel": "self", "type": "application/geo+json", "title": "10.1079/9780851994512.0367", "name": "item", "description": "10.1079/9780851994512.0367", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1079/9780851994512.0367"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2001-01-01T00:00:00Z"}}, {"id": "10.1073/pnas.2201832120", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:45Z", "type": "Journal Article", "created": "2021-12-23", "title": "Megaherbivores modify forest structure and increase carbon stocks through multiple pathways", "description": "Abstract

Megaherbivores have pervasive ecological effects. In African rainforests, elephants can increase aboveground carbon, though the mechanisms are unclear. Here we combine a large unpublished dataset of forest elephant feeding with published browsing preferences totaling > 120,000 records covering 700 plant species, including nutritional data for 102 species. Elephants increase carbon stocks by: 1) promoting high wood density tree species via preferential browsing on leaves from low wood density species, which are more digestible; 2) dispersing seeds of trees that are relatively large and have the highest average wood density among tree guilds based on dispersal mode. Loss of forest elephants could cause a 5-12% decline in carbon stocks due to regeneration failure of elephant-dispersed trees and an increase in abundance of low wood density trees. These results show the major importance of megaherbivores in maintaining diverse, high-carbon tropical forests. Successful elephant conservation will contribute to climate mitigation at a scale of global relevance.

", "keywords": ["0106 biological sciences", "570", "plant animal interactions", "Elephants", "MESH: Carbon", "carbon cycling", "Forests", "01 natural sciences", "Trees", "megafauna", "MESH: Biomass", "Animals", "MESH: Animals", "Biomass", "nature-based solutions", "Tropical Climate", "biogeochemical cycles", "MESH: Forests", "Biological Sciences", "15. Life on land", "Carbon", "MESH: Trees", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "MESH: Elephants", "MESH: Tropical Climate", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology"]}, "links": [{"href": "https://pnas.org/doi/pdf/10.1073/pnas.2201832120"}, {"href": "https://doi.org/10.1073/pnas.2201832120"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Proceedings%20of%20the%20National%20Academy%20of%20Sciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1073/pnas.2201832120", "name": "item", "description": "10.1073/pnas.2201832120", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1073/pnas.2201832120"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-12-23T00:00:00Z"}}, {"id": "10.1073/pnas.2308516120", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:45Z", "type": "Journal Article", "created": "2023-12-21", "title": "Radiation and temperature drive diurnal variation of aerobic methane emissions from Scots pine canopy", "description": "

Methane emissions from plant foliage may play an important role in the global methane cycle, but their size and the underlying source processes remain poorly understood. Here, we quantify methane fluxes from the shoots of Scots pine trees, a dominant tree species in boreal forests, to identify source processes and environmental drivers, and we evaluate whether these fluxes can be constrained at the ecosystem-level by eddy covariance flux measurements. We show that shoot-level measurements conducted in forest, garden, or greenhouse settings; on mature trees and saplings; manually and with an automated CO 2 -, temperature-, and water-controlled chamber system; and with multiple methane analyzers all resulted in comparable daytime fluxes (0.144 \uffc2\uffb1 0.019 to 0.375 \uffc2\uffb1 0.074 nmol CH 4 g \uffe2\uff88\uff921 foliar d.w. h \uffe2\uff88\uff921 ). We further find that these emissions exhibit a pronounced diurnal cycle that closely follows photosynthetically active radiation and is further modulated by temperature. These diurnal patterns indicate that methane production is associated with diurnal cycle of sunlight, indicating that this production is either a byproduct of photosynthesis-associated biochemical reactions (e.g., the methionine cycle) or produced through nonenzymatic photochemical reactions in plant biomass. Moreover, we identified a light-dependent component in stand-level methane fluxes, which showed order-of-magnitude agreement with shoot-level measurements (0.968 \uffc2\uffb1 0.031 nmol CH 4 g \uffe2\uff88\uff921 h \uffe2\uff88\uff921 ) and which provides an upper limit for shoot methane emissions. Stem borers are the most important maize pests in the humid forest zone of Cameroon. Field trials were conducted in the long and short rainy seasons of 2002 and 2003 to assess the level of damage and yield reductions caused by stem borers in monocropped maize and in maize intercropped with non-host plants such as cassava, cowpea and soybean. The intercrops were planted in two spatial arrangements, i.e. alternating hills or alternating rows. All intercrops and the maize monocrop were grown with and without insecticide treatment for assessment of maize yield loss due to borer attacks. The land-use efficiency of each mixed cropping system was evaluated by comparing it with the monocrop. The temporal fluctuation of larval infestations followed the same pattern in all cropping systems, but at the early stage of plant growth, larval densities were 21.3\uffe2\uff80\uff9348.1% higher in the monocrops than in intercrops, and they tended to be higher in alternating rows than alternating hills arrangements. At harvest, however, pest densities did not significantly vary between treatments. Maize monocrops had 3.0\uffe2\uff80\uff938.8 times more stems tunnelled and 1.3\uffe2\uff80\uff933.1 times more cob damage than intercrops. Each percentage increase in stem tunnelling lowered maize grain yield by 1.10 and 1.84 g per plant, respectively, during the long and short rainy season in 2002, and by 5.39 and 1.41 g per plant, respectively, in 2003. Maize yield losses due to stem borer were 1.8\uffe2\uff80\uff933.0 times higher in monocrops than in intercrops. Intercrops had generally a higher land-use efficiency than monocrops, as indicated by land-equivalent-ratios and area-time-equivalent-ratios of >1.0. Land-use efficiency was similar in both spatial arrangements. At current price levels, the net production of mixed cropping systems was economically superior to controlling stem borers with insecticide in monocropped maize. The maize\uffe2\uff80\uff93cassava intercrop yielded the highest land equivalent ratios and the highest replacement value of the intercrop. At medium intensity cropping this system is thus recommended for land-constrained poor farmers who do not use external inputs such as fertilizer and insecticides.

", "keywords": ["0106 biological sciences", "2. Zero hunger", "Manihot", "Glycine max", "Rain", "Agriculture", "Fabaceae", "Humidity", "Moths", "15. Life on land", "Zea mays", "01 natural sciences", "Host-Parasite Interactions", "Trees", "Larva", "Animals", "Biomass", "Cameroon", "Seasons"], "contacts": [{"organization": "Christian Nolte, A. Chabi-Olaye, Christian Borgemeister, Fritz Schulthess,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1079/ber2005373"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Bulletin%20of%20Entomological%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1079/ber2005373", "name": "item", "description": "10.1079/ber2005373", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1079/ber2005373"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-10-01T00:00:00Z"}}, {"id": "10.1111/gcb.70179", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:19:24Z", "type": "Journal Article", "created": "2025-04-07", "title": "Lightning Impacts on Global Forest and Carbon Dynamics: Current Understanding and Knowledge Gaps", "description": "Lightning is a fundamental Earth system process that influences the world's major forest biomes and their carbon storage through two primary pathways. Lightning is the major cause of boreal forest fires, while lightning strikes kill patches of trees in tropical forests. We summarized the current understanding of these processes and identified knowledge gaps.", "keywords": ["carbon", "tropical", "Forests", "Lightning", "Carbon", "Carbon Cycle", "Trees", "forest", "Perspective", "boreal", "tree mortality", "Life Science", "lightning", "fire"], "contacts": [{"organization": "Sander Veraverbeke, Thomas A. J. Janssen, Esther Brambleby, Matt Jones, Bianca Zoletto, Masha T. van der Sande,", "roles": ["creator"]}]}, "links": [{"href": "https://ueaeprints.uea.ac.uk/id/eprint/99058/1/Veraverbeke_etal_2025_GlobalChangeBiology.pdf"}, {"href": "https://doi.org/10.1111/gcb.70179"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcb.70179", "name": "item", "description": "10.1111/gcb.70179", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.70179"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-04-01T00:00:00Z"}}, {"id": "10.1080/15324980301596", "type": "Feature", "geometry": null, "properties": {"license": "Restricted", "updated": "2026-06-24T16:18:55Z", "type": "Journal Article", "created": "2003-11-25", "title": "Managing Parkia Biglobosa And Vitellaria Paradoxa Prunings For Crop Production And Improved Soil Properties In The Sub-Sudanian Zone Of Burkina Faso", "description": "Tree pruning generates organic resources whose nitrogen content is not always recycled appropriately. A field experiment was conducted in the central plateau of Burkina Faso to test the possibilities of improving soil properties and crop production through the application of Parkia biglobosa (nere) and Vitellaria paradoxa (karite) prunings as mulch. Two rates of leaf material of each species were applied and compared with a control (without mulch). Each treatment was repeated four times. Positions from the trees (around the trunk, eastern side, western side and outside the crown) were considered as blocks in a randomized blocks design. The physical and chemical properties of soil were measured during the second year whereas millet production was assessed over two cropping seasons. Two laboratory experiments were conducted with leachates of the leaves of each species to test the possible inhibition of crop germination or growth. The results of the field experiment showed a depressing effect of the mulch of...", "keywords": ["fertility", "2. Zero hunger", "0106 biological sciences", "nere", "systems", "0401 agriculture", " forestry", " and fisheries", "west-africa", "trees", "04 agricultural and veterinary sciences", "jacq benth", "01 natural sciences"], "contacts": [{"organization": "Bayala, J., Mando, A., Ou\u00e9draogo, E., Teklehaimanot, Z.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1080/15324980301596"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Arid%20Land%20Research%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/15324980301596", "name": "item", "description": "10.1080/15324980301596", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/15324980301596"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2003-01-01T00:00:00Z"}}, {"id": "10.1080/10549811.2016.1175950", "type": "Feature", "geometry": null, "properties": {"updated": "2026-06-24T16:18:54Z", "type": "Journal Article", "created": "2016-04-14", "title": "Dynamics Of Soil Carbon Stock, Total Nitrogen, And Associated Soil Properties Since The Conversion Ofacaciawoodland To Managed Pastureland, Parkland Agroforestry, And Treeless Cropland In The Jido Komolcha District, Southern Ethiopia", "description": "ABSTRACTIn the arid, low biomass producing areas of Ethiopia, Acacia woodlands suffered a severe degradation due to exploitation for various uses, and conversion to grazing and cultivated lands. However, little is known on the impact of agricultural land uses on soil organic carbon (SOC), total nitrogen (TN) stocks, and other soil quality indicators. This study was planned to evaluate SOC and TN stock changes under parkland agroforestry (PAF), managed pastureland (MPL), and treeless cropland (TLCL) regimes by considering the remnant protected woodland (PWL) as a reference. We found that SOC and TN stocks were significantly higher in PWL and MPL areas. Conversion of Acacia woodlands to MPL, PAF, and TLCL resulted in the loss of SOC stock by 23, 50, and 56%, respectively. Higher SOC and TN stocks were found under PWL (144.3 Mg\u00a0ha\u22121) and MPL (108.2 Mg\u00a0ha\u22121). Significant changes in available phosphorous (P), exchangeable cations, and cation exchangeable capacity were observed following the woodland conversion...", "keywords": ["2. Zero hunger", "crop residues", "utilizaci\u00f3n de la tierra", "residuos de cosechas", "suelo", "land use", "trees", "04 agricultural and veterinary sciences", "15. Life on land", "carbon sequestration", "secuestro de carbono", "soil", "agroforestry", "0401 agriculture", " forestry", " and fisheries", "agroforesteria", "\u00e1rboles"]}, "links": [{"href": "https://doi.org/10.1080/10549811.2016.1175950"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Sustainable%20Forestry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/10549811.2016.1175950", "name": "item", "description": "10.1080/10549811.2016.1175950", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/10549811.2016.1175950"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-05-24T00:00:00Z"}}, {"id": "10.1111/gcb.16982", "type": "Feature", "geometry": null, "properties": {"license": "Open Access", "updated": "2026-06-24T16:19:23Z", "type": "Journal Article", "created": "2023-10-30", "title": "New ways for (in)validating the forest carbon neutrality hypothesis", "description": "Abstract

Over 50\uffe2\uff80\uff89years ago, Eugene Odum postulated that mature or climax forests reside in carbon neutrality. As climate change rose to prominence in the international environmental agenda, the neutrality hypothesis transformed from an ecological principle to a justification for using forest management in combating climate change. Despite persistent efforts, Odum's neutrality hypothesis has resisted both confirmation and refutation. In this opinion we show the limitations of past efforts to (in)validate Odum's neutrality hypothesis and propose new research directions for the community to permit a more general confirmation or refutation with current and near\uffe2\uff80\uff90future observations. We then demonstrate such an approach by using metabolic theory to formulate testable predictions for the total sink strength considering soil, litter, and biomass of mature or climax forests based on observations of tree biomass and individual density. In doing so, we show that ecological theory can create additional relevant, testable hypotheses to provide timely support to decision\uffe2\uff80\uff90makers seeking to address one of the world's most pressing environmental challenges.Forests play a crucial role in global carbon cycling by absorbing and storing significant amounts of atmospheric carbon dioxide. Although boreal forests contribute to approximately 45% of the total forest carbon sink, tree growth and soil carbon sequestration are constrained by nutrient availability. Here, we examine if long\uffe2\uff80\uff90term nutrient input enhances tree productivity and whether this leads to carbon storage or whether stimulated microbial decomposition of organic matter limits soil carbon accumulation. Over six decades, nitrogen, phosphorus, and calcium were supplied to a Pinus sylvestris\uffe2\uff80\uff90dominated boreal forest. We found that nitrogen fertilization alone or together with calcium and/or phosphorus increased tree biomass production by 50% and soil carbon sequestration by 65% compared to unfertilized plots. However, the nonlinear relationship observed between tree productivity and soil carbon stock across treatments suggests microbial regulation. When phosphorus was co\uffe2\uff80\uff90applied with nitrogen, it acidified the soil, increased fungal biomass, altered microbial community composition, and enhanced biopolymer degradation capabilities. While no evidence of competition between ectomycorrhizal and saprotrophic fungi has been observed, key functional groups with the potential to reduce carbon stocks were identified. In contrast, when nitrogen was added without phosphorus, it increased soil carbon sequestration because microbial activity was likely limited by phosphorus availability. In conclusion, the addition of nitrogen to boreal forests may contribute to global warming mitigation, but this effect is context dependent.