The effects of atmospheric nitrogen (N) deposition on organic matter decomposition vary with the biochemical characteristics of plant litter. At the ecosystem\uffe2\uff80\uff90scale, net effects are difficult to predict because various soil organic matter (SOM) fractions may respond differentially. We investigated the relationship between SOM chemistry and microbial activity in three northern deciduous forest ecosystems that have been subjected to experimental N addition for 2 years. Extractable dissolved organic carbon (DOC), DOC aromaticity, C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio, and functional group distribution, measured by Fourier transform infrared spectra (FTIR), were analyzed for litter and SOM. The largest biochemical changes were found in the sugar maple\uffe2\uff80\uff93basswood (SMBW) and black oak\uffe2\uff80\uff93white oak (BOWO) ecosystems. SMBW litter from the N addition treatment had less aromaticity, higher C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratios, and lower saturated carbon, lower carbonyl carbon, and higher carboxylates than controls; BOWO litter showed opposite trends, except for carbonyl and carboxylate contents. Litter from the sugar maple\uffe2\uff80\uff93red oak (SMRO) ecosystem had a lower C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio, but no change in DOC aromaticity. For SOM, the C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio increased with N addition in SMBW and SMRO ecosystems, but decreased in BOWO; N addition did not affect the aromaticity of DOC extracted from mineral soil. All ecosystems showed increases in extractable DOC from both litter and soil in response to N treatment. The biochemical changes are consistent with the divergent microbial responses observed in these systems. Extracellular oxidative enzyme activity has declined in the BOWO and SMRO ecosystems while activity in the SMBW ecosystem, particularly in the litter horizon, has increased. In all systems, enzyme activities associated with the hydrolysis and oxidation of polysaccharides have increased. At the ecosystem scale, the biochemical characteristics of the dominant litter appear to modulate the effects of N deposition on organic matter dynamics.
", "keywords": ["Litter Chemistry", "Geology and Earth Sciences", "13. Climate action", "Soil Organic Matter", "Science", "Ecology and Evolutionary Biology", "0401 agriculture", " forestry", " and fisheries", "Nitrogen Deposition", "04 agricultural and veterinary sciences", "15. Life on land", "Dissolved Organic Matter", "Extracellular Enzyme Activity"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2486.2005.01001.x"}, {"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/j.1365-2486.2005.01001.x", "name": "item", "description": "10.1111/j.1365-2486.2005.01001.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2005.01001.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-07-19T00:00:00Z"}}, {"id": "10.1021/acs.est.1c04605", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:14Z", "type": "Journal Article", "created": "2021-12-02", "title": "Exploring Spatially Explicit Changes in Carbon Budgets of Global River Basins during the 20th Century", "description": "Rivers play an important role in the global carbon (C) cycle. However, it remains unknown how long-term river C fluxes change because of climate, land-use, and other environmental changes. Here, we investigated the spatiotemporal variations in global freshwater C cycling in the 20th century using the mechanistic IMAGE-Dynamic Global Nutrient Model extended with the Dynamic In-Stream Chemistry Carbon module (DISC-CARBON) that couples river basin hydrology, environmental conditions, and C delivery with C flows from headwaters to mouths. The results show heterogeneous spatial distribution of dissolved inorganic carbon (DIC) concentrations in global inland waters with the lowest concentrations in the tropics and highest concentrations in the Arctic and semiarid and arid regions. Dissolved organic carbon (DOC) concentrations are less than 10 mg C/L in most global inland waters and are generally high in high-latitude basins. Increasing global C inputs, burial, and CO2 emissions reported in the literature are confirmed by DISC-CARBON. Global river C export to oceans has been stable around 0.9 Pg yr-1. The long-term changes and spatial patterns of concentrations and fluxes of different C forms in the global river network unfold the combined influence of the lithology, climate, and hydrology of river basins, terrestrial and biological C sources, in-stream C transformations, and human interferences such as damming.", "keywords": ["global budget", "Arctic Regions", "Fresh Water", "General Chemistry", "15. Life on land", "carbon biogeochemistry", "Dissolved Organic Matter", "01 natural sciences", "river fluxes", "6. Clean water", "process-based hydrology-biogeochemistry model", "Rivers", "13. Climate action", "SDG 13 - Climate Action", "Environmental Chemistry", "Humans", "SDG 14 - Life Below Water", "14. Life underwater", "Hydrology", "spatiotemporal variations", "SDG 15 - Life on Land", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://pubs.acs.org/doi/pdf/10.1021/acs.est.1c04605"}, {"href": "https://doi.org/10.1021/acs.est.1c04605"}, {"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/acs.est.1c04605", "name": "item", "description": "10.1021/acs.est.1c04605", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1021/acs.est.1c04605"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-12-02T00:00:00Z"}}, {"id": "10.1023/a:1006128401073", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:21Z", "type": "Journal Article", "created": "2002-12-22", "description": "In cropping systems with limited amounts of external inputs, the soil organic matter pool (SOM) may contribute significantly to plant nutrition. The impact of organic inputs on total SOM and particulate organic matter (POM) N contents as affected by soil type and the relationships between sources of N and maize N uptake were assessed for a set of alley cropping trials in the West- African moist savanna. The trials were established in Niaouli (Benin Republic), in Glidji, Amoutchou, and Sarakawa (Togo), and in Bouake and Ferkessedougou (Cote d\u2018 Ivoire). The total soil N content, averaged over all treatments and years, varied between 324 and 1140 mg N kg\u22121 soil. The POM-N content varied between 50 and 160 mg N kg\u22121 soil. The average proportion of soil N belonging to the POM pool ranged between 9% and 29%. This was significantly related to the annual N inputs from maize stover and prunings, when averaged over the different alley cropping treatments. The trial \u2018age\u2018 also appeared to be related to the impact of the different treatments on the POM-N content. The Ferkessedougou soil contained a relatively higher proportion of total soil N in the POM pool because of its relatively high silt and clay content, compared to the other sites. The relative change in POM-N content between 1996 and the initial sampling was about twice the relative change in total soil N content. This suggests that N incorporated in the POM is relatively labile, compared to N incorporated in the other SOM fractions. Maize N uptake was related to the amount of add pruning-N (partial r2 of 27%), the rainfall during the growing season (partial r2 of 17%), the POM-N content (partial r2 of 14%), and to a lesser degree to the POM N concentration (partial r2 of 5%), the fertilizer N addition rate (partial r2 of 3%), and the silt and clay content of the soil (partial r2 of 3%). The POM-N content was shown to be influenced by organic matter additions and soil characteristics and to contribute significantly to maize N supply. This pool may be an important indicator for the soil fertility status of savanna soils.", "keywords": ["alley cropping", "2. Zero hunger", "senna siamea", "albie lebbeck", "cropping systems", "04 agricultural and veterinary sciences", "particle size", "15. Life on land", "01 natural sciences", "6. Clean water", "gliricidia sepium", "leucaena leucocephala", "soil organic matter", "0401 agriculture", " forestry", " and fisheries", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1023/a:1006128401073"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agroforestry%20Systems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1023/a:1006128401073", "name": "item", "description": "10.1023/a:1006128401073", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1023/a:1006128401073"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-09-01T00:00:00Z"}}, {"id": "10.1023/a:1010310300067", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:22Z", "type": "Journal Article", "created": "2002-12-23", "description": "Planted tree or shrub fallows can help increase the fertility of degraded tropical soils. We investigated the effects of planted fallows of Indigofera (IND), Calliandra (CAL), and Tithonia (TTH); a natural, unmanaged fallow (NAT); and a maize/bean rotation (ROT) on the dynamics and partitioning of soil organic matter (SOM) and phosphorus (P). One year after treatment, samples were collected from a fine-textured volcanic-ash soil (Oxic Dystropept) of a mid-altitude hillside in southwestern Colombia. The SOM in the sand-size fraction (150\u20132000 \u03bcm) was subdivided into light (LL), intermediate (LM), and heavy (LH) fractions. Total soil P was also fractionated into inorganic (Pi) and organic (Po). Of the planted fallows, TTH most increased and NAT least increased plant-available Pi and Po. The amounts of C, N, and P in the LL and LM fractions of SOM followed the order, TTH>CAL>NAT>ROT>IND and CAL>TTH>IND>NAT>ROT, respectively. Total amounts of N, P, K, Ca, and Mg in the soil were significantly (P < 0.05) highest under TTH and lowest under NAT. The fallow and ROT systems did not affect the C/N, C/P, and N/P ratios in the soil but significantly did so in the LL and LM fractions of SOM. Significant correlations indicated that the P content in the LL and LM fractions of SOM may help determine the amounts of NaHCO3-extractable Pi and Po, which may therefore serve as sensitive indicators of `readily available' and `readily mineralizable' soil P pools, respectively, in the volcanic-ash soils of the Andes.", "keywords": ["2. Zero hunger", "rotaci\u00f3n de cultivos", "soil chemicophysical properties", "soil fertility", "materia org\u00e1nica del suelo", "calliandra calothyrsus", "04 agricultural and veterinary sciences", "rotational cropping", "fertilidad del suelo", "15. Life on land", "fallow systems", "indigofera constricta", "sistemas con barbecho", "soil organic matter", "tithonia diversifolia", "propiedades f\u00edsico - qu\u00edmicas suelo", "0401 agriculture", " forestry", " and fisheries", "phosphorus"]}, "links": [{"href": "https://doi.org/10.1023/a:1010310300067"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Plant%20and%20Soil", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1023/a:1010310300067", "name": "item", "description": "10.1023/a:1010310300067", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1023/a:1010310300067"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2001-04-01T00:00:00Z"}}, {"id": "10.1029/2007gb003168", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:28Z", "type": "Journal Article", "created": "2009-04-03", "title": "Grazing Effects On Belowground C And N Stocks Along A Network Of Cattle Exclosures In Temperate And Subtropical Grasslands Of South America", "description": "We evaluated the effects of grazing on C and N belowground pools by comparing 15 grazing\uffe2\uff80\uff90exclosure pairs across the R\uffc3\uffado de la Plata grasslands of Uruguay and Argentina. We measured C and N pools of belowground biomass, particulate organic matter (POM), and the mineral associated organic matter (MAOM) in the top meter of the soil. Grazing exclusion in the R\uffc3\uffado de la Plata grasslands promoted (1) decreased belowground biomass stocks across all sites, (2) increased soil organic carbon (SOC) and soil organic nitrogen (SON) stocks in upland soils, and (3) decreased stocks in shallow and lowland soils. In all cases, SOC and SON variations were largely derived by changes in MAOM stocks that maintained their C:N ratios unchanged. In contrast, stocks of the labile POM fractions changed little, but C:N ratios of these fractions decreased after grazing removal. We hypothesize that changes in soil organic matter (SOM) contents between grazed and ungrazed stands result from the balance between changes in belowground N allocation patterns (root N retention hypothesis) and the ability of the soil to retain the extra N available after the exclusion of herbivores and the cessation of volatilization and leaching from urine and dung patches (N loss hypothesis). On the basis of our results we suggest that the relative importance of these two cooccurring mechanisms will shape grazing effects on SOM stocks, depending on soil properties, including texture, pH and soil depth, and vegetation type, particularly allocation patterns and C:N ratios of different plant species.
", "keywords": ["2. Zero hunger", "ARGENTINA", "GRAZING", "AGRICULTURE", "SOIL SCIENCES", "SOIL ORGANIC MATTER", "RANGE MANAGEMENT", "04 agricultural and veterinary sciences", "15. Life on land", "carbono", "pastoreo", "nitrogeno", "13. Climate action", "URUGUAY", "gradientes", "https://purl.org/becyt/ford/4.1", "0401 agriculture", " forestry", " and fisheries", "https://purl.org/becyt/ford/4", "GRASSLANDS", "AGROCHEMICALS"]}, "links": [{"href": "https://doi.org/10.1029/2007gb003168"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Biogeochemical%20Cycles", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2007gb003168", "name": "item", "description": "10.1029/2007gb003168", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2007gb003168"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-04-04T00:00:00Z"}}, {"id": "10.1029/95gb02148", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:32Z", "type": "Journal Article", "created": "2004-02-04", "title": "Belowground Cycling Of Carbon In Forests And Pastures Of Eastern Amazonia", "description": "Forests in seasonally dry areas of eastern Amazonia near Paragominas, Par\uffc3\uffa1, Brazil, maintain an evergreen forest canopy through an extended dry season by taking up soil water through deep (>1 m) roots. Belowground allocation of C in these deep\uffe2\uff80\uff90rooting forests is very large (1900 g C m\uffe2\uff88\uff922 yr\uffe2\uff88\uff921) relative to litterfall (460 g C m\uffe2\uff88\uff922 yr\uffe2\uff88\uff921). The presence of live roots drives an active carbon cycle deeper than l m in the soil. Although bulk C concentrations and 14C contents of soil organic matter at >l\uffe2\uff80\uff90m depths are low, estimates of turnover from fine\uffe2\uff80\uff90root inputs, CO2 production, and the 14C content of CO2 produced at depth show that up to 15% of the carbon inventory in the deep soil has turnover times of decades or less. Thus the amount of fast\uffe2\uff80\uff90cycling soil carbon between 1 and 8\uffe2\uff80\uff90m depths (2\uffe2\uff80\uff933 kg C m\uffe2\uff88\uff922, out of 17\uffe2\uff80\uff9318 kg C m\uffe2\uff88\uff922) is significant compared to the amount present in the upper meter of soil (3\uffe2\uff80\uff934 kg C m\uffe2\uff88\uff922 out of 10\uffe2\uff80\uff9311 kg C m\uffe2\uff88\uff922). A model of belowground carbon cycling derived from measurements of carbon stocks and fluxes, and constrained using carbon isotopes, is used to predict C fluxes associated with conversion of deep\uffe2\uff80\uff90rooting forests to pasture and subsequent pasture management. The relative proportions and turnover times of active (including detrital plant material; 1\uffe2\uff80\uff933 year turnover), slow (decadal and shorter turnover), and passive (centennial to millennial turnover) soil organic matter pools are determined by depth for the forest soil, using constraints from measurements of C stocks, fluxes, and isotopic content. Reduced carbon inputs to the soil in degraded pastures, which are less productive than the forests they replace, lead to a reduction in soil carbon inventory and \uffce\uff9414C, in accord with observations. Managed pastures, which have been fertilized with phosphorous and planted with more productive grasses, show increases in C and 14C over forest values. Carbon inventory increases in the upper meter of managed pasture soils are partially offset by predicted carbon losses due to death and decomposition of fine forest roots at depths >1 m in the soil. The major adjustments in soil carbon inventory in response to land management changes occur within the first decade after conversion. Carbon isotopes are shown to be more sensitive indicators of recent accumulation or loss of soil organic matter than direct measurement of soil C inventories.
", "keywords": ["cycling", "decomposition", "model", "rooting", "carbon", "belowground carbon cycling", "carbon cycling", "04 agricultural and veterinary sciences", "South America", "15. Life on land", "Poaceae", "soil", "pasture", "forest", "Amazonia", "soil organic matter", "death", "tropical soil", "0401 agriculture", " forestry", " and fisheries", "phosphorus", "Brazil", "organic matter"]}, "links": [{"href": "https://escholarship.org/content/qt1zb7d8kx/qt1zb7d8kx.pdf"}, {"href": "https://doi.org/10.1029/95gb02148"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Biogeochemical%20Cycles", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/95gb02148", "name": "item", "description": "10.1029/95gb02148", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/95gb02148"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1995-12-01T00:00:00Z"}}, {"id": "10.1088/1748-9326/ab239c", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:28Z", "type": "Journal Article", "created": "2019-05-30", "title": "Global soil acidification impacts on belowground processes", "description": "AbstractWith continuous nitrogen (N) enrichment and sulfur (S) deposition, soil acidification has accelerated and become a global environmental issue. However, a full understanding of the general pattern of ecosystem belowground processes in response to soil acidification due to the impacting factors remains elusive. We conducted a meta-analysis of soil acidification impacts on belowground functions using 304 observations from 49 independent studies, mainly including soil cations, soil nutrient, respiration, root and microbial biomass. Our results show that acid addition significantly reduced soil pH by 0.24 on average, with less pH decrease in forest than non-forest ecosystems. The response ratio of soil pH was positively correlated with site precipitation and temperature, but negatively with initial soil pH. Soil base cations (Ca2+, Mg2+, Na+) decreased while non-base cations (Al3+, Fe3+) increased with soil acidification. Soil respiration, fine root biomass, microbial biomass carbon and nitrogen were significantly reduced by 14.7%, 19.1%, 9.6% and 12.1%, respectively, under acid addition. These indicate that soil carbon processes are sensitive to soil acidification. Overall, our meta-analysis suggests a strong negative impact of soil acidification on belowground functions, with the potential to suppress soil carbon emission. It also arouses our attention to the toxic effects of soil ions on terrestrial ecosystems.
", "keywords": ["Biomass (ecology)", "Organic chemistry", "Soil pH", "soil respiration", "Environmental technology. Sanitary engineering", "Agricultural and Biological Sciences", "Engineering", "Terrestrial ecosystem", "Soil water", "Climate change", "GE1-350", "TD1-1066", "Ecology", "Physics", "Soil Water Retention", "Ocean acidification", "Q", "Life Sciences", "Soil respiration", "04 agricultural and veterinary sciences", "Soil carbon", "6. Clean water", "Chemistry", "Physical Sciences", "Environmental chemistry", "soil cations", "microbes", "Mechanics and Transport in Unsaturated Soils", "Nitrogen", "Science", "QC1-999", "Materials Science", "Soil Science", "Thermal Effects on Soil", "Environmental science", "Biomaterials", "soil pH", "acid deposition", "Soil Carbon Sequestration", "Biology", "Soil acidification", "Ecosystem", "Civil and Structural Engineering", "Applications of Clay Nanotubes in Various Fields", "Soil science", "Soil organic matter", "Soil Fertility", "15. Life on land", "Soil biodiversity", "Agronomy", "meta-analysis", "Environmental sciences", "Soil Hydraulic Properties", "13. Climate action", "FOS: Biological sciences", "Bulk soil", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems", "Nutrient"]}, "links": [{"href": "https://doi.org/10.1088/1748-9326/ab239c"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Research%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1088/1748-9326/ab239c", "name": "item", "description": "10.1088/1748-9326/ab239c", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1088/1748-9326/ab239c"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-07-01T00:00:00Z"}}, {"id": "10.1038/s41467-019-11993-1", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:38Z", "type": "Journal Article", "created": "2019-09-04", "title": "Plant roots increase both decomposition and stable organic matter formation in boreal forest soil", "description": "AbstractBoreal forests are ecosystems with low nitrogen (N) availability that store globally significant amounts of carbon (C), mainly in plant biomass and soil organic matter (SOM). Although crucial for future climate change predictions, the mechanisms controlling boreal C and N pools are not well understood. Here, using a three-year field experiment, we compare SOM decomposition and stabilization in the presence of roots, with exclusion of roots but presence of fungal hyphae and with exclusion of both roots and fungal hyphae. Roots accelerate SOM decomposition compared to the root exclusion treatments, but also promote a different soil N economy with higher concentrations of organic soil N compared to inorganic soil N accompanied with the build-up of stable SOM-N. In contrast, root exclusion leads to an inorganic soil N economy (i.e., high level of inorganic N) with reduced stable SOM-N build-up. Based on our findings, we provide a framework on how plant roots affect SOM decomposition and stabilization.
", "keywords": ["roots", "0106 biological sciences", "330", "Nitrogen", "Science", "ta1171", "Hyphae", "Models", " Biological", "Plant Roots", "01 natural sciences", "Article", "LITTER DECOMPOSITION", "Soil", "POLYPHENOLS", "CARBON SEQUESTRATION", "soil organic matter", "Taiga", "SDG 13 - Climate Action", "SUGAR MAPLE", "Biomass", "Organic Chemicals", "forest ecology", "106026 Ecosystem research", "Ecosystem", "Soil Microbiology", "TANNINS", "2. Zero hunger", "106022 Mikrobiologie", "ECTOMYCORRHIZAL FUNGI", "MYCORRHIZA", "Q", "ta1182", "Forestry", "04 agricultural and veterinary sciences", "Plants", "15. Life on land", "Carbon", "Environmental sciences", "NITROGEN", "Boreal forests", "106026 \u00d6kosystemforschung", "13. Climate action", "SDG 13 \u2013 Ma\u00dfnahmen zum Klimaschutz", "106022 Microbiology", "ta1181", "0401 agriculture", " forestry", " and fisheries", "COMMUNITIES", "STORAGE"]}, "links": [{"href": "https://www.nature.com/articles/s41467-019-11993-1.pdf"}, {"href": "https://doi.org/10.1038/s41467-019-11993-1"}, {"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/s41467-019-11993-1", "name": "item", "description": "10.1038/s41467-019-11993-1", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41467-019-11993-1"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-09-04T00:00:00Z"}}, {"id": "10.1038/s43247-022-00523-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:46Z", "type": "Journal Article", "created": "2022-08-18", "title": "Ecoenzymatic stoichiometry reveals widespread soil phosphorus limitation to microbial metabolism across Chinese forests", "description": "AbstractForest soils contain a large amount of organic carbon and contribute to terrestrial carbon sequestration. However, we still have a poor understanding of what nutrients limit soil microbial metabolism that drives soil carbon release across the range of boreal to tropical forests. Here we used ecoenzymatic stoichiometry methods to investigate the patterns of microbial nutrient limitations within soil profiles (organic, eluvial and parent material horizons) across 181 forest sites throughout China. Results show that, in 80% of these forests, soil microbes were limited by phosphorus availability. Microbial phosphorus limitation increased with soil depth and from boreal to tropical forests as ecosystems become wetter, warmer, more productive, and is affected by anthropogenic nitrogen deposition. We also observed an unexpected shift in the latitudinal pattern of microbial phosphorus limitation with the lowest phosphorus limitation in the warm temperate zone (41-42\uffc2\uffb0N). Our study highlights the importance of soil phosphorus limitation to restoring forests and predicting their carbon sinks.Quantifying global patterns of terrestrial nitrogen (N) cycling is central to predicting future patterns of primary productivity, carbon sequestration, nutrient fluxes to aquatic systems and climate forcing. With limited direct measures of soil N cycling at the global scale, syntheses of the 15N:14N ratio of soil organic matter across climate gradients provide key insights into understanding global patterns of N cycling. In synthesizing data from over 6000 soil samples, we show strong global relationships among soil N isotopes, mean annual temperature (MAT), mean annual precipitation (MAP) and the concentrations of organic carbon and clay in soil. In both hot ecosystems and dry ecosystems, soil organic matter was more enriched in 15N than in corresponding cold ecosystems or wet ecosystems. Below a MAT of 9.8\uffc2\uffb0C, soil \uffce\uffb415N was invariant with MAT. At the global scale, soil organic C concentrations also declined with increasing MAT and decreasing MAP. After standardizing for variation among mineral soils in soil C and clay concentrations, soil \uffce\uffb415N showed no consistent trends across global climate and latitudinal gradients. Our analyses could place new constraints on interpretations of patterns of ecosystem N cycling and global budgets of gaseous N loss.
", "keywords": ["N-15 Natural-Abundance", "550", "Ecosystem ecology", "TROPICAL FORESTS", "Organic chemistry", "Suelo", "Nitrogen cycle", "01 natural sciences", "Nutrient cycle", "cycle de l'azote", "CARBON", "Agricultural and Biological Sciences", "Soil", "Terrestrial ecosystem", "Isotopes", "https://purl.org/becyt/ford/1.6", "Soil water", "SDG 13 - Climate Action", "N-15 NATURAL-ABUNDANCE", "Climate change", "croisement de donn\u00e9es", "Milieux et Changements globaux", "SDG 15 \u2013 Leben an Land", "Global change", "SDG 15 - Life on Land", "2. Zero hunger", "106022 Mikrobiologie", "Climatic Factors", "Tropical Forests", "Ecology", "Geography", "Nitr\u00f3geno", "Nutrient Cycling", "FRACTIONATION", "Litter Decomposition", "ECOSYSTEM ECOLOGY", "Life Sciences", "ecosystem ecology", "Cycling", "Forestry", "Is\u00f3topos", "Carbon cycle", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "Soil carbon", "6. Clean water", "Organic-Matter", "Earth and Planetary Sciences", "ORGANIC-MATTER", "Chemistry", "PRECIPITATION", "SDG 13 \u2013 Ma\u00dfnahmen zum Klimaschutz", "Physical Sciences", "106022 Microbiology", "carbone du sol", "Stable Isotope Analysis of Groundwater and Precipitation", "Ecosystem Functioning", "570", "STABLE ISOTOPE", "Biogeochemical Cycling of Nutrients in Aquatic Ecosystems", "Stable isotope analysis", "Nitrogen", "[SDE.MCG]Environmental Sciences/Global Changes", "Soil Science", "stable isotope analysis;ecosystem ecology", "Article", "Environmental science", "LITTER DECOMPOSITION", "sol min\u00e9ral", "INORGANIC NITROGEN", "Geochemistry and Petrology", "stable isotope analysis", "Carbono", "Environmental Chemistry", "Factores Clim\u00e1ticos", "https://purl.org/becyt/ford/1", "Biology", "Ecosystem", "0105 earth and related environmental sciences", "Soil science", "Soil organic matter", "Soil Fertility", "climat", "AVAILABILITY", "Nitrogen Dynamics", "15. Life on land", "Carbon", "Inorganic", "NITROGEN", "MODEL", "[SDE.MCG] Environmental Sciences/Global Changes", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "PATTERNS", "0401 agriculture", " forestry", " and fisheries", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems"]}, "links": [{"href": "https://scholars.unh.edu/context/faculty_pubs/article/1042/viewcontent/srep08280.pdf"}, {"href": "https://edoc.unibas.ch/37215/1/srep08280.pdf"}, {"href": "https://doi.org/10.1038/srep08280"}, {"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/srep08280", "name": "item", "description": "10.1038/srep08280", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/srep08280"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-02-06T00:00:00Z"}}, {"id": "10.1046/j.1365-2486.2003.00598.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:18:53Z", "type": "Journal Article", "created": "2003-05-06", "title": "Soil Organic Matter Biochemistry And Potential Susceptibility To Climatic Change Across The Forest-Tundra Ecotone In The Fennoscandian Mountains", "description": "AbstractWe studied soil organic carbon (C) chemistry at the mountain birch forest\uffe2\uff80\uff90tundra ecotone in three regions of the Fennoscandian mountain range with comparable vegetation cover but contrasting degrees of continentality and latitude. The aim of the study was to identify functional compound classes and their relationships to decomposition and spatial variation across the ecotone and latitudinal gradient. Solid\uffe2\uff80\uff90state 13C nuclear magnetic resonance (CPMAS 13C NMR) was used to identify seven functional groups of soil organic C: alkyls, N\uffe2\uff80\uff90alkyls, O\uffe2\uff80\uff90alkyls, acetals, aromatics, phenolics and carboxyls. N\uffe2\uff80\uff90alkyls, O\uffe2\uff80\uff90alkyls and acetals are generally considered labile substrates for a large number of saprotrophic fungi and bacteria, whilst phenolics and aromatics are mainly decomposed by lignolytic organisms and contribute to the formation of soil organic matter together with aliphatic alkyls and carboxyls. All soils contained a similar proportional distribution of functional groups, although relatively high amounts of N\uffe2\uff80\uff90alkyls, O\uffe2\uff80\uff90alkyls and acetals were present in comparison to earlier published studies, suggesting that large amounts of soil C were potentially vulnerable to microbial degradation. Soil organic matter composition was different at the most southerly site (Dovrefjell, Norway), compared with the two more northerly sites (Abisko, Sweden, and Joatka, Norway), with higher concentrations of aromatics and phenolics, as well as pronounced differences in alkyl concentrations between forest and tundra soils. Clear differences between mountain birch forest and tundra heath soil was noted, with generally higher concentrations of labile carbon present in tundra soils. We conclude that, although mesic soils around the forest\uffe2\uff80\uff90tundra ecotone in Fennoscandia are a potential source of C to the atmosphere in a changing environment, the response is likely to vary between comparable ecosystems in relation to latitude and continentality as well as soil properties especially soil nitrogen content and pH.
", "keywords": ["570", "decomposition", "550", "Fennoscandia", "Mass Import - autoclassified (may be erroneous)", "04 agricultural and veterinary sciences", "910", "15. Life on land", "Chemistry", "Soil", "ecotone", "13. Climate action", "soil organic matter", "CPMAS 13C NMR", "Climate change", "0401 agriculture", " forestry", " and fisheries"]}, "links": [{"href": "https://doi.org/10.1046/j.1365-2486.2003.00598.x"}, {"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": "10.1046/j.1365-2486.2003.00598.x", "name": "item", "description": "10.1046/j.1365-2486.2003.00598.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1365-2486.2003.00598.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2003-05-01T00:00:00Z"}}, {"id": "10.1071/sr07106", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:05Z", "type": "Journal Article", "created": "2008-12-02", "title": "Traffic And Tillage Effects On Wheat Production On The Loess Plateau Of China: 1. Crop Yield And Som", "description": "Challenges for dryland farming on the Loess Plateau of China are continuous nutrient loss, low soil organic matter and crop yield, and soil degradation. Controlled traffic, combined with zero or minimum tillage and residue cover, has been proposed to improve soil structure and crop yield. From 1998 to 2006, we conducted a field experiment comparing soil organic matter and wheat productivity between controlled traffic and conventional tillage farming systems. The field experiment was conducted using 2 controlled traffic treatments (zero tillage with residue cover and no compaction, shallow tillage with residue cover and no compaction) and a conventional tillage treatment. Results showed that controlled traffic treatments significantly increased soil organic matter and microbial biomass in the 0\uffe2\uff80\uff930.30\uffe2\uff80\uff89m soil profile. Controlled traffic with zero tillage significantly increased total N in the 0\uffe2\uff80\uff930.05\uffe2\uff80\uff89m soil profile. The mean yield over 8 years of controlled traffic treatments was >10% greater than that of conventional tillage. Controlled traffic farming appears to be a solution to the cropping problems faced on the Loess Plateau of China.
", "keywords": ["2. Zero hunger", "Soil organic matter", "Controlled traffic", "Wheat yield", "13. Climate action", "2304 Environmental Chemistry", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "15. Life on land", "1111 Soil Science", "630", "6. Clean water"]}, "links": [{"href": "https://doi.org/10.1071/sr07106"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Research", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1071/sr07106", "name": "item", "description": "10.1071/sr07106", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1071/sr07106"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-01-01T00:00:00Z"}}, {"id": "10.1080/00103624.2013.790406", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:13Z", "type": "Journal Article", "created": "2013-04-16", "title": "Influence Of Soil Management And Crop Rotation On Physical Properties In A Long-Term Experiment In Parana, Brazil", "description": "This work aims to evaluate the soil physical properties affected by cover crop rotation and soil management in a long-term experiment in southern Brazil. The experiment was established in 1986, with treatments combining six winter treatments and two tillage systems (conventional and no tillage). Bulk density, porosity, aggregate-size class distribution, and organic carbon content of the aggregates were determined at six depths. Bulk density was not affected by tillage systems and winter treatments. The soil disturbance by plowing enhanced the macroporosity, decreased the microporosity, and promoted the formation of smaller aggregate size, in comparison to no tillage. Apart from the soil management, all winter species increased the greater aggregate-size classes, mean weight diameter, geometric mean diameter, and aggregate stability index compared to the fallow treatments. At the no-till treatments, the greater part of sequestered carbon into the soil was stored into the lower and bigger soil aggregates.", "keywords": ["STABILIZATION", "[SDV]Life Sciences [q-bio]", "cover crop", "AGGREGATE", "PARTICULATE", "ORGANIC-MATTER DYNAMICS", "630", "CARBON", "soil organic matter", "Farm nutrient management", "CONSERVATION TILLAGE", "Conservation tillage", "2. Zero hunger", "CULTIVATED SOILS", "04 agricultural and veterinary sciences", "15. Life on land", "sustainability", "Soil tillage", "6. Clean water", "[SDV] Life Sciences [q-bio]", "Crop combinations and interactions", "subtropical soil", "0401 agriculture", " forestry", " and fisheries", "NO-TILLAGE", "CONVENTIONAL-TILLAGE", "FRACTIONS"]}, "links": [{"href": "https://doi.org/10.1080/00103624.2013.790406"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Communications%20in%20Soil%20Science%20and%20Plant%20Analysis", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1080/00103624.2013.790406", "name": "item", "description": "10.1080/00103624.2013.790406", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/00103624.2013.790406"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-07-20T00:00:00Z"}}, {"id": "10.1080/15324980490497393", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:24Z", "type": "Journal Article", "created": "2004-09-23", "title": "Litter Production And Soil Fertility In A Vitellaria Paradoxa Parkland In A Catena In Southern Mali", "description": "Many authors have expressed concerns about the evolution of soil fertility under cotton and cereal cultivation in southern Mali. Nevertheless, farmers have now cropped some of their fields for more than 30 years and still obtain fair yields. Our hypothesis is that the trees (mainly Vitellaria paradoxa) that farmers keep in their cropped fields help to maintain soil fertility. Consequently, we studied the relationships between the trees associated with crops and soil fertility on a sloped catena. On the lower section, 24 trees ha\u22121 cover 8% of the surface. They produce annually \u223c56.7\u00a0kg of leaves per tree. Corresponding mineral recyclings, under the crown, are, per m2 and per year: 19\u00a0g N; 1\u00a0g P; 19\u00a0g K; 29\u00a0g Ca; 10\u00a0g Mg. The soil contains significantly more C and N under the crown of the trees than outside this area. V. paradoxa trees are less numerous on the middle section (3\u00a0ha\u22121) and on the top section (1.5\u00a0ha\u22121) of the catena than on the lower section, and consequently, their effect on the soil is dec...", "keywords": ["agroforesterie", "2. Zero hunger", "liti\u00e8re foresti\u00e8re", "http://aims.fao.org/aos/agrovoc/c_7170", "F08 - Syst\u00e8mes et modes de culture", "Vitellaria paradoxa", "P35 - Fertilit\u00e9 du sol", "sol de zone aride", "04 agricultural and veterinary sciences", "15. Life on land", "http://aims.fao.org/aos/agrovoc/c_612", "01 natural sciences", "http://aims.fao.org/aos/agrovoc/c_207", "http://aims.fao.org/aos/agrovoc/c_4540", "fertilit\u00e9 du sol", "http://aims.fao.org/aos/agrovoc/c_15235", "0401 agriculture", " forestry", " and fisheries", "http://aims.fao.org/aos/agrovoc/c_3047", "mati\u00e8re organique du sol", "http://aims.fao.org/aos/agrovoc/c_35657", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Traor\u00e9, Kalifa B., Ganry, Francis, Oliver, Robert, Gigou, Jacques,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1080/15324980490497393"}, {"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": "10.1080/15324980490497393", "name": "item", "description": "10.1080/15324980490497393", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1080/15324980490497393"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-10-01T00:00:00Z"}}, {"id": "10.1088/1748-9326/aaeb5f", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:28Z", "type": "Journal Article", "created": "2018-10-25", "title": "Revisiting IPCC Tier 1 coefficients for soil organic and biomass carbon storage in agroforestry systems", "description": "Open AccessLos sistemas agroforestales comprenden \u00e1rboles y cultivos, o \u00e1rboles y pastos dentro del mismo campo. A nivel mundial, cubren aproximadamente mil millones de hect\u00e1reas de tierra y contribuyen a los medios de vida de m\u00e1s de 900 millones de personas. Los sistemas agroforestales tienen la capacidad de secuestrar grandes cantidades de carbono (C) tanto en el suelo como en la biomasa. Sin embargo, estos sistemas a\u00fan no se han considerado completamente en el enfoque de la contabilidad C desarrollado por el Grupo Intergubernamental de Expertos sobre el Cambio Clim\u00e1tico, en gran parte debido a la alta diversidad de los sistemas agroforestales y la escasez de datos relevantes. Nuestra revisi\u00f3n de la literatura identific\u00f3 un total de 72 art\u00edculos cient\u00edficos revisados por pares asociados con el almacenamiento de biomasa C (50) y con el carbono org\u00e1nico del suelo (SOC) (122), que contienen un total de 542 observaciones (324 y 218, respectivamente). Con base en una s\u00edntesis de las observaciones informadas, presentamos un conjunto de coeficientes de Nivel 1 para el almacenamiento de biomasa C para cada uno de los ocho sistemas agroforestales principales identificados, incluidos cultivos en callejones, barbechos, setos, multiestratos, parques, cultivos perennes sombreados, silvoarables y sistemas silvopastoriles, desglosados por clima y regi\u00f3n. Utilizando la misma clasificaci\u00f3n agroforestal, presentamos un conjunto de factores de cambio de stock (FLU) y tasas de acumulaci\u00f3n/p\u00e9rdida de COS para tres cambios principales en el uso de la tierra (Luc): de tierras de cultivo a agroforester\u00eda; de bosques a agroforester\u00eda; y de pastizales a agroforester\u00eda. A nivel mundial, los factores medios de cambio de stock SOC (\u00b1 intervalos de confianza) se estimaron en 1,25 \u00b1 0,04, 0,89 \u00b1 0,07 y 1,19 \u00b1 0,10, para los tres LUC principales, respectivamente. Sin embargo, estos coeficientes promedio ocultan enormes disparidades entre y dentro de diferentes climas, regiones y tipos de sistemas agroforestales, lo que destaca la necesidad de adoptar los coeficientes m\u00e1s desagregados que se proporcionan en este documento. Alentamos a los gobiernos nacionales a sintetizar datos de experimentos de campo locales para generar factores espec\u00edficos de cada pa\u00eds para una estimaci\u00f3n m\u00e1s s\u00f3lida de la biomasa y el almacenamiento de COS.", "keywords": ["emission factor", "Carbon sequestration", "Biomass (ecology)", "F08 - Syst\u00e8mes et modes de culture", "Environmental technology. Sanitary engineering", "climate change mitigation", "Agricultural and Biological Sciences", "Climate change mitigation", "http://aims.fao.org/aos/agrovoc/c_7427", "Agroforestry Systems and Biodiversity Enhancement", "Soil water", "11. Sustainability", "Climate change", "GE1-350", "TD1-1066", "http://aims.fao.org/aos/agrovoc/c_35657", "agroforesterie", "2. Zero hunger", "changement climatique", "Global and Planetary Change", "Geography", "Ecology", "Physics", "Q", "Life Sciences", "Forestry", "Agriculture", "04 agricultural and veterinary sciences", "Soil carbon", "http://aims.fao.org/aos/agrovoc/c_207", "s\u00e9questration du carbone", "http://aims.fao.org/aos/agrovoc/c_926", "Archaeology", "http://aims.fao.org/aos/agrovoc/c_4182", "Physical Sciences", "Ecosystem Functioning", "mati\u00e8re organique du sol", "P33 - Chimie et physique du sol", "land use change", "P40 - M\u00e9t\u00e9orologie et climatologie", "Science", "QC1-999", "stockage", "Soil Science", "utilisation des terres", "Environmental science", "biomasse", "Ecosystem services", "http://aims.fao.org/aos/agrovoc/c_1666", "http://aims.fao.org/aos/agrovoc/c_1301", "Agroforestry", "Soil Carbon Sequestration", "Biology", "Land use", " land-use change and forestry", "Ecosystem", "Soil science", "15. Life on land", "http://aims.fao.org/aos/agrovoc/c_331583", "carbon sequestration", "Agronomy", "Environmental sciences", "Carbon dioxide", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "Land use", "0401 agriculture", " forestry", " and fisheries", "carbone", "Soil Carbon Dynamics and Nutrient Cycling in Ecosystems", "Drivers and Impacts of Tropical Deforestation"]}, "links": [{"href": "https://doi.org/10.1088/1748-9326/aaeb5f"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Research%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1088/1748-9326/aaeb5f", "name": "item", "description": "10.1088/1748-9326/aaeb5f", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1088/1748-9326/aaeb5f"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-12-14T00:00:00Z"}}, {"id": "10.1093/nsr/nwab120", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:19:33Z", "type": "Journal Article", "created": "2021-06-29", "title": "Significant loss of soil inorganic carbon at the continental scale", "description": "AbstractWidespread soil acidification due to atmospheric acid deposition and agricultural fertilization may greatly accelerate soil carbonate dissolution and CO2 release. However, to date, few studies have addressed these processes. Here, we use meta-analysis and nationwide-survey datasets to investigate changes in soil inorganic carbon (SIC) stocks in China. We observe an overall decrease in SIC stocks in topsoil (0\uffe2\uff80\uff9330\uffc2\uffa0cm) (11.33\uffc2\uffa0g C m\uffe2\uff80\uff932 yr\uffe2\uff80\uff931) from the 1980s to the 2010s. Total SIC stocks have decreased by \uffe2\uff88\uffbc8.99\uffc2\uffa0\uffc2\uffb1\uffc2\uffa02.24% (1.37\uffc2\uffa0\uffc2\uffb1\uffc2\uffa00.37\uffc2\uffa0Pg C). The average SIC losses across China (0.046 Pg C yr\uffe2\uff80\uff931) and in cropland (0.016 Pg C yr\uffe2\uff80\uff931) account for \uffe2\uff88\uffbc17.6%\uffe2\uff80\uff9324.0% of the terrestrial C sink and 57.1% of the soil organic carbon sink in cropland, respectively. Nitrogen deposition and climate change have profound influences on SIC cycling. We estimate that \uffe2\uff88\uffbc19.12%\uffe2\uff80\uff9319.47% of SIC stocks will be further lost by 2100. The consumption of SIC may offset a large portion of global efforts aimed at ecosystem carbon sequestration, which emphasizes the importance of achieving a better understanding of the indirect coupling mechanisms of nitrogen and carbon cycling and of effective countermeasures to minimize SIC loss.Since the last glacial maximum, soil formation related to ice\uffe2\uff80\uff90cover shrinkage has been one major sink of carbon accumulating as soil organic matter (SOM), a phenomenon accelerated by the ongoing global warming. In recently deglacierized forelands, processes of SOM accumulation, including those that control carbon and nitrogen sequestration rates and biogeochemical stability of newly sequestered carbon, remain poorly understood. Here, we investigate the build\uffe2\uff80\uff90up of SOM during the initial stages (up to 410\uffc2\uffa0years) of topsoil development in 10 glacier forelands distributed on four continents. We test whether the net accumulation of SOM on glacier forelands (i) depends on the time since deglacierization and local climatic conditions (temperature and precipitation); (ii) is accompanied by a decrease in its stability and (iii) is mostly due to an increasing contribution of organic matter from plant origin. We measured total SOM concentration (carbon, nitrogen), its relative hydrogen/oxygen enrichment, stable isotopic (13C, 15N) and carbon functional groups (C\uffe2\uff80\uff90H, C=O, C=C) compositions, and its distribution in carbon pools of different thermal stability. We show that SOM content increases with time and is faster on forelands experiencing warmer climates. The build\uffe2\uff80\uff90up of SOM pools shows consistent trends across the studied soil chronosequences. During the first decades of soil development, the low amount of SOM is dominated by a thermally stable carbon pool with a small and highly thermolabile pool. The stability of SOM decreases with soil age at all sites, indicating that SOM storage is dominated by the accumulation of labile SOM during the first centuries of soil development, and suggesting plant carbon inputs to soil (SOM depleted in nitrogen, enriched in hydrogen and in aromatic carbon). Our findings highlight the potential vulnerability of SOM stocks from proglacial areas to decomposition and suggest that their durability largely depends on the relative contribution of carbon inputs from plants.
", "keywords": ["[SDV.BID.SPT]Life Sciences [q-bio]/Biodiversity/Systematics", "550", "Nitrogen", "Chronosequence", "551", "01 natural sciences", "[SDV.BV.BOT] Life Sciences [q-bio]/Vegetal Biology/Botanics", "Soil", "soil organic matter", "carbon stability; chronosequence; climate sensitivity; soil organic matter; topsoil development; Carbon; Nitrogen; Temperature; Ice Cover; Soil", "[SDV.BID.SPT] Life Sciences [q-bio]/Biodiversity/Systematics", " Phylogenetics and taxonomy", "[SDV.EE.ECO] Life Sciences [q-bio]/Ecology", " environment/Ecosystems", "Ice Cover", "topsoil development", "Carbon stability", "0105 earth and related environmental sciences", "2. Zero hunger", "Soil organic matter", "Temperature", "Phylogenetics and taxonomy", "04 agricultural and veterinary sciences", "[SDV.BV.BOT]Life Sciences [q-bio]/Vegetal Biology/Botanics", "15. Life on land", "Climate sensitivity", "Primary Research Articles", "Carbon", "chronosequence", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "13. Climate action", "[SDV.EE.ECO]Life Sciences [q-bio]/Ecology", "[SDE]Environmental Sciences", "Topsoil development", "climate sensitivity", "carbon stability; chronosequence; climate sensitivity; soil organic matter; topsoil development;", "0401 agriculture", " forestry", " and fisheries", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology", "environment/Ecosystems", "carbon stability"]}, "links": [{"href": "https://air.unimi.it/bitstream/2434/851691/2/khedim%202021%20submitted.pdf"}, {"href": "https://air.unimi.it/bitstream/2434/851691/3/khedim%202021%20Global%20Change%20Biol.pdf"}, {"href": "https://boa.unimib.it/bitstream/10281/300214/2/10281-300214_VoR.pdf"}, {"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.15496"}, {"href": "https://doi.org/10.1111/gcb.15496"}, {"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.15496", "name": "item", "description": "10.1111/gcb.15496", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.15496"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-01-16T00:00:00Z"}}, {"id": "10.1111/j.1365-2486.2005.001058.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-03T16:20:04Z", "type": "Journal Article", "created": "2005-11-28", "title": "Effects Of Experimental Drought On Soil Respiration And Radiocarbon Efflux From A Temperate Forest Soil", "description": "AbstractSoil moisture affects microbial decay of SOM and rhizosphere respiration (RR) in temperate forest soils, but isolating the response of soil respiration (SR) to summer drought and subsequent wetting is difficult because moisture changes are often confounded with temperature variation. We distinguished between temperature and moisture effects by simulation of prolonged soil droughts in a mixed deciduous forest at the Harvard Forest, Massachusetts. Roofs constructed over triplicate 5 \uffc3\uff97 5\uffe2\uff80\uff83m2plots excluded throughfall water during the summers of 2001 (168\uffe2\uff80\uff83mm) and 2002 (344\uffe2\uff80\uff83mm), while adjacent control plots received ambient throughfall and the same natural temperature regime. In 2003, throughfall was not excluded to assess the response of SR under natural weather conditions after two prolonged summer droughts. Throughfall exclusion significantly decreased mean SR rate by 53\uffe2\uff80\uff83mg\uffe2\uff80\uff83C\uffe2\uff80\uff83m\uffe2\uff88\uff922\uffe2\uff80\uff83h\uffe2\uff88\uff921over 84 days in 2001, and by 68\uffe2\uff80\uff83mg\uffe2\uff80\uff83C\uffe2\uff80\uff83m\uffe2\uff88\uff922\uffe2\uff80\uff83h\uffe2\uff88\uff921over 126 days in 2002, representing 10\uffe2\uff80\uff9330% of annual SR in this forest and 35\uffe2\uff80\uff9375% of annual net ecosystem exchange (NEE) of C. The differences in SR were best explained by differences in gravimetric water content in the Oi horizon (r2=0.69) and the Oe/Oa horizon (r2=0.60). Volumetric water content of the A horizon was not significantly affected by throughfall exclusion. The radiocarbon signature of soil CO2efflux and of CO2respired during incubations of O horizon, A horizon and living roots allowed partitioning of SR into contributions from young C substrate (including RR) and from decomposition of older SOM. RR (root respiration and microbial respiration of young substrates in the rhizosphere) made up 43\uffe2\uff80\uff9371% of the total C respired in the control plots and 41\uffe2\uff80\uff9380% in the exclusion plots, and tended to increase with drought. An exception to this trend was an interesting increase in CO2efflux of radiocarbon\uffe2\uff80\uff90rich substrates during a period of abundant growth of mushrooms.
Our results suggest that prolonged summer droughts decrease primarily heterotrophic respiration in the O horizon, which could cause increases in the storage of soil organic carbon in this forest. However, the C stored during two summers of simulated drought was only partly released as increased respiration during the following summer of natural throughfall. We do not know if this soil C sink during drought is transient or long lasting. In any case, differential decomposition of the O horizon caused by interannual variation of precipitation probably contributes significantly to observed interannual variation of NEE in temperate forests.
", "keywords": ["Ecology", "04 agricultural and veterinary sciences", "Biological Sciences", "15. Life on land", "soil respiration", "6. Clean water", "soil drought", "heterotrophic respiration", "rhizosphere respiration", "13. Climate action", "soil organic matter", "temperate forest", "radiocarbon", "0401 agriculture", " forestry", " and fisheries", "soil wetting", "soil moisture", "Q(10)", "Environmental Sciences"]}, "links": [{"href": "https://escholarship.org/content/qt3mk9v58k/qt3mk9v58k.pdf"}, {"href": "https://doi.org/10.1111/j.1365-2486.2005.001058.x"}, {"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/j.1365-2486.2005.001058.x", "name": "item", "description": "10.1111/j.1365-2486.2005.001058.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2005.001058.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-11-28T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&offset=50&soil_chemical_properties=soil+organic+matter&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&offset=50&soil_chemical_properties=soil+organic+matter&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "prev", "title": "items (prev)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&soil_chemical_properties=soil+organic+matter&offset=0", "hreflang": "en-US"}, {"rel": "next", "type": "application/geo+json", "title": "items (next)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?facets=true&soil_chemical_properties=soil+organic+matter&offset=100", "hreflang": "en-US"}], "numberMatched": 229, "numberReturned": 50, "distributedFeatures": [], "timeStamp": "2026-04-04T15:23:41.774002Z"}