Forests provide important ecological, economic, and social services, and recent interest has emerged in the potential for using residue from timber harvest as a source of renewable woody bioenergy. The long\uffe2\uff80\uff90term consequences of such intensive harvest are unclear, particularly as forests face novel climatic conditions over the next century. We used a simulation model to project the long\uffe2\uff80\uff90term effects of management and climate change on above\uffe2\uff80\uff90 and belowground forest carbon storage in a watershed in northwestern Oregon. The multi\uffe2\uff80\uff90ownership watershed has a diverse range of current management practices, including little\uffe2\uff80\uff90to\uffe2\uff80\uff90no harvesting on federal lands, short\uffe2\uff80\uff90rotation clear\uffe2\uff80\uff90cutting on industrial land, and a mix of practices on private nonindustrial land. We simulated multiple management scenarios, varying the rate and intensity of harvest, combined with projections of climate change. Our simulations project a wide range of total ecosystem carbon storage with varying harvest rate, ranging from a 45% increase to a 16% decrease in carbon compared to current levels. Increasing the intensity of harvest for bioenergy caused a 2\uffe2\uff80\uff933% decrease in ecosystem carbon relative to conventional harvest practices. Soil carbon was relatively insensitive to harvest rotation and intensity, and accumulated slowly regardless of harvest regime. Climate change reduced carbon accumulation in soil and detrital pools due to increasing heterotrophic respiration, and had small but variable effects on aboveground live carbon and total ecosystem carbon. Overall, we conclude that current levels of ecosystem carbon storage are maintained in part due to substantial portions of the landscape (federal and some private lands) remaining unharvested or lightly managed.\uffc2\uffa0Increasing the intensity of harvest for bioenergy on currently harvested land, however,\uffc2\uffa0led to a relatively small reduction in the ability of forests to store carbon. Climate change is unlikely to substantially alter carbon storage in these forests, absent shifts in disturbance regimes.
", "keywords": ["0106 biological sciences", "Carbon dioxide mitigation", "Forest ecology -- Oregon -- Oregon Coast Range", "Forest biomass", "13. Climate action", "Carbon cycle (Biogeochemistry)", "Biomass energy", "Forest Biology", "15. Life on land", "01 natural sciences", "7. Clean energy", "Climatic change", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1111/gcbb.12255"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/GCB%20Bioenergy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcbb.12255", "name": "item", "description": "10.1111/gcbb.12255", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcbb.12255"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-05-25T00:00:00Z"}}, {"id": "10.5281/zenodo.7307449", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:23:16Z", "type": "Dataset", "title": "Components of the complete budget for SAFE intensive carbon plots", "description": "Description: Measured components of total carbon budget at SAFE project, values, with standard errors, for each 1-ha carbon plots for 11 plots investigated across a logging gradient from unlogged old-growth to heavily logged.Drylands (hyperarid, arid, semiarid, and dry subhumid ecosystems) cover almost half of Earth\uffe2\uff80\uff99s land surface and are highly vulnerable to environmental pressures. Here we provide an inventory of soil properties including carbon (C), nitrogen (N), and phosphorus (P) stocks within the current boundaries of drylands, aimed at serving as a benchmark in the face of future challenges including increased population, food security, desertification, and climate change. Aridity limits plant production and results in poorly developed soils, with coarse texture, low C:N and C:P, scarce organic matter, and high vulnerability to erosion. Dryland soils store 646 Pg of organic C to 2\uffe2\uff80\uff89m, the equivalent of 32% of the global soil organic C pool. The magnitude of the historic loss of C from dryland soils due to human land use and cover change and their typically low C:N and C:P suggest high potential to build up soil organic matter, but coarse soil textures may limit protection and stabilization processes. Restoring, preserving, and increasing soil organic matter in drylands may help slow down rising levels of atmospheric carbon dioxide by sequestering C, and is strongly needed to enhance food security and reduce the risk of land degradation and desertification.Soil moisture is among the most important factors regulating soil biodiversity and functioning. Models forecast changes in the precipitation regime in many areas of the planet, but how these changes will influence soil functioning, and how biotic drivers modulate such effects, is far from being understood. We evaluated the responses of C and N fluxes, and soil microbial properties to different soil water regimes in soils from the main three ecotypes of the world's largest and most diverse tropical savanna. Further, we explored the direct and indirect effects of changes in the ecotype and soil water regimes on these key soil processes. Soils from the woodland savanna showed a better nutritional status than the other ecotypes, as well as higher potential N cycling rates, N2O emissions, and soil bacterial abundance but lower bacterial richness, whereas potential CO2 emissions and CH4 uptake peaked in the intermediate savanna. The ecotype also modulated the effects of changes in the soil water regime on nutrient cycling, greenhouse gas fluxes, and soil bacterial properties, with more intense responses in the intermediate savanna. Further, we highlight the existence of multiple contrasting direct and indirect (via soil microbes and abiotic properties) effects of an intensification of the precipitation regime on soil C- and N-related processes. Our results confirm that ecotype is a fundamental driver of soil properties and functioning in the Cerrado and that it can determine the responses of key soil processes to changes in the soil water regime.Decades of fire suppression following extensive timber harvesting have left much of the forest in the intermountain western United States exceedingly dense, and forest restoration techniques (i.e., thinning and prescribed fire) are increasingly being used in an attempt to mitigate the effects of severe wildfire, to enhance tree growth and regeneration, and to stimulate soil nutrient cycling. While many of the short\uffe2\uff80\uff90term effects of forest restoration have been established, the long\uffe2\uff80\uff90term effects on soil biogeochemical and ecosystem processes are largely unknown. We assessed the effects of commonly used forest restoration treatments (thinning, burning, and thinning\uffc2\uffa0+\uffc2\uffa0burning) on nutrient cycling and other ecosystem processes 11\uffc2\uffa0yr after restoration treatments were implemented in a ponderosa pine (Pinus ponderosavar.scopulorum)/Douglas fir (Pseudotsuga menziesiivar.glauca) forest at the Lubrecht Fire and Fire Surrogates Study (FFS) site in western Montana, USA. Despite short\uffe2\uff80\uff90term (<3\uffc2\uffa0yr) increases in soil inorganic nitrogen (N) pools and N cycling rates following prescribed fire, long\uffe2\uff80\uff90term soil N pools and N mineralization rates showed only subtle differences from untreated control plots. Similarly, despite a persistent positive correlation between fuels consumed in prescribed burns and several metrics of N cycling, variability in inorganic N pools decreased significantly since treatments were implemented, indicating a decline in N spatial heterogeneity through time. However, rates of net nitrification remain significantly higher in a thin + burn treatment relative to other treatments. Short\uffe2\uff80\uff90term declines in forest floor carbon (C) pools have persisted in the thin\uffc2\uffa0+\uffc2\uffa0burn treatment, but there were no significant long\uffe2\uff80\uff90term differences among treatments in extractable soil phosphorus (P). Finally, despite some short\uffe2\uff80\uff90term differences, long\uffe2\uff80\uff90term foliar nutrient concentrations, litter decomposition rates, and rates of free\uffe2\uff80\uff90living N fixation in the experimental plots were not different from control plots, suggesting nutrient cycles and ecosystem processes in temperate coniferous forests are resilient to disturbance following long periods of fire suppression. Overall, this study provides forest managers and policymakers valuable information showing that the effects of these commonly used restoration prescriptions on soil nutrient cycling are ephemeral and that use of repeated treatments (i.e., frequent fire) will be necessary to ensure continued restoration success.
", "keywords": ["0106 biological sciences", "Canada", "Time Factors", "Nitrogen", "04 agricultural and veterinary sciences", "Forests", "Nitrogen Cycle", "15. Life on land", "01 natural sciences", "Carbon", "6. Clean water", "Carbon Cycle", "Soil", "Tracheophyta", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Environmental Restoration and Remediation"], "contacts": [{"organization": "Michael J. Gundale, Rachel E. Becknell, Peter W. Ganzlin, Cory C. Cleveland,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1002/15-1100"}, {"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": "10.1002/15-1100", "name": "item", "description": "10.1002/15-1100", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/15-1100"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-07-01T00:00:00Z"}}, {"id": "10.1002/ecy.1595", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:02Z", "type": "Journal Article", "created": "2016-09-28", "title": "Resource Stoichiometry And The Biogeochemical Consequences Of Nitrogen Deposition In A Mixed Deciduous Forest", "description": "AbstractEcosystems often show differential sensitivity to chronic nitrogen (N) deposition; hence, a critical challenge is to improve our understanding of how and why site\uffe2\uff80\uff90specific factors mediate biogeochemical responses to N enrichment. We examined the extent to which N impacts on soil carbon (C) and N dynamics depend on microbial resource stoichiometry. We added N to forest plots dominated by ectomycorrhizal (ECM) trees, which have litter and soil pools rich in organic N and relatively wide C:N ratios, and adjacent forest plots dominated by arbuscular mycorrhizal (AM) trees, which have litter and soil pools rich in inorganic N and relatively narrow C:N ratios. While microbes in both plot types exhibited fairly strict biomass homeostasis, microbes in AM\uffe2\uff80\uff90 and ECM\uffe2\uff80\uff90dominated plots differed in their physiological responses to N addition. Microbes in ECM plots responded to N enrichment by decreasing their investment in N\uffe2\uff80\uff90acquisition enzymes (relative to C\uffe2\uff80\uff90acquisition enzymes) and increasing N mineralization rates (relative to C mineralization rates), suggesting that N addition alleviated microbial N demand. In contrast, heterotrophic microbial activities in AM plots were unaffected by N addition, most likely as a result of N\uffe2\uff80\uff90induced increases in net nitrification (60% increase relative to control plots) and nitrate mobilization (e.g., sixfold increases in mobilization relative to control plots). Combined, our findings suggest the stoichiometric differences between AM and ECM soils are the primary drivers of the observed responses. Plant and microbial communities characterized by wide C:N are more susceptible to N\uffe2\uff80\uff90induced changes in decomposition and soil C dynamics, whereas communities characterized by narrow C:N are more susceptible to N\uffe2\uff80\uff90induced nitrate leaching losses. Hence, the biogeochemical consequences of N deposition in temperate forests may be driven by the stoichiometry of the dominant trees and their associated microbes.
", "keywords": ["2. Zero hunger", "Soil", "Nitrates", "Nitrogen", "13. Climate action", "Mycorrhizae", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "Forests", "Nitrogen Cycle", "15. Life on land", "Nitrification"]}, "links": [{"href": "https://doi.org/10.1002/ecy.1595"}, {"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": "10.1002/ecy.1595", "name": "item", "description": "10.1002/ecy.1595", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/ecy.1595"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-12-01T00:00:00Z"}}, {"id": "10.1002/jsfa.4645", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:06Z", "type": "Journal Article", "created": "2011-10-12", "title": "Restricted Mineralization Of Fresh Organic Materials Incorporated Into A Subtropical Paddy Soil", "description": "AbstractBACKGROUND: Microbial activities involved in the dynamics of organic matter determine the potential for organic carbon (C) accumulation in soil. To understand this for paddy soil, an incubation experiment (25 \uffc2\uffb0C, 45% water\uffe2\uff80\uff90holding capacity) was established using 14C\uffe2\uff80\uff90labelled glucose and rice straw (500 \uffc2\uffb5g C g\uffe2\uff88\uff921 soil) as substrates; an adjacent upland soil was used for comparison.
RESULTS: The amount of microbial biomass in the paddy soil was approximately 6 times larger and its turnover rate was 1.5\uffe2\uff80\uff933 times faster than in the upland soil. These proportions of 14C\uffe2\uff80\uff90labelled glucose and rice straw mineralized in the paddy soil were about 3% smaller (P < 0.01) than those in the upland soil. Also, there was no significant priming effect of fresh substrate additions on the mineralization of native organic C in the paddy soil, while the priming effect was significant in the upland soil.
CONCLUSION: Although the paddy soil contains a large amount of microbial biomass, which is also very active, the mineralization of fresh substrates is significantly restricted in this soil, along with a small priming effect. This favours the accumulation of organic C in paddy soils. Copyright \uffc2\uffa9 2011 Society of Chemical Industry
", "keywords": ["2. Zero hunger", "Minerals", "Tropical Climate", "Agriculture", "Oryza", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "Carbon Cycle", "Soil", "Glucose", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Ecosystem", "Soil Microbiology"], "contacts": [{"organization": "Ping Zhou, John Keith Syers, Hongzhao Yuan, Yirong Su, Ling Li, Jinshui Wu,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1002/jsfa.4645"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.4645", "name": "item", "description": "10.1002/jsfa.4645", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.4645"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-12T00:00:00Z"}}, {"id": "10.1002/jsfa.4647", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:06Z", "type": "Journal Article", "created": "2011-09-27", "title": "Response Of Soil Organic Carbon Mineralization In Typical Karst Soils Following The Addition Of 14c-Labeled Rice Straw And Caco3", "description": "AbstractBACKGROUND: Organic substrates and calcium are important factors controlling organic matter turnover in Karst soils. To understand their effects on soil organic carbon (SOC) mineralization, an incubation experiment was conducted involving a control treatment (CK), the addition of a 14C\uffe2\uff80\uff90labeled rice straw (T1), CaCO3 (T2), and both 14C\uffe2\uff80\uff90labeled rice straw and CaCO3 (T3) to two types of Karst soils (terra fusca and rendzina) and a red soil from southwestern China.
RESULTS: Cumulative mineralization of the rice straw over 100 days in rendzina (22.96 mg kg\uffe2\uff88\uff921) and terra fusca (23.19 mg kg\uffe2\uff88\uff921) was higher than in the red soil (15.48 mg kg\uffe2\uff88\uff921; P < 0.05). Cumulative mineralization of native SOC decreased following addition of 14C\uffe2\uff80\uff90labeled rice straw in the rendzina and terra fusca but increased in the red soil (negative and positive priming effects on native SOC). The turnover times of 14C\uffe2\uff80\uff90labeled microbial biomass C (MBC) in the red soil, terra fusca and rendzina were 71 \uffc2\uffb1 2, 243 \uffc2\uffb1 20 and 254 \uffc2\uffb1 45 days, respectively. By adding CaCO3, the accumulation of SOC was greater in the Karst soils than in the red soil.
CONCLUSION: Although the interactions between rice straw decomposition and priming effects on native SOC are not yet understood, there was considerable variation between Karst and red soils. Soil calcium was a positive factor in maintaining SOC stability. MBC from rice straws was stable in terra fusca and rendzina, whereas it was active in the red soil. The Karst soils (terra fusca and rendzina) used in this study benefited SOC accumulation. Copyright \uffc2\uffa9 2011 Society of Chemical Industry
", "keywords": ["2. Zero hunger", "Carbon Isotopes", "Soil", "0401 agriculture", " forestry", " and fisheries", "Calcium", "Oryza", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "Soil Microbiology", "6. Clean water", "Calcium Carbonate", "Carbon Cycle"]}, "links": [{"href": "https://doi.org/10.1002/jsfa.4647"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20the%20Science%20of%20Food%20and%20Agriculture", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1002/jsfa.4647", "name": "item", "description": "10.1002/jsfa.4647", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1002/jsfa.4647"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-09-23T00:00:00Z"}}, {"id": "10.1007/pl00008869", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:20Z", "type": "Journal Article", "created": "2006-04-10", "title": "Combined Effects Of Atmospheric Co2 And N Availability On The Belowground Carbon And Nitrogen Dynamics Of Aspen Mesocosms", "description": "It is uncertain whether elevated atmospheric CO2 will increase C storage in terrestrial ecosystems without concomitant increases in plant access to N. Elevated CO2 may alter microbial activities that regulate soil N availability by changing the amount or composition of organic substrates produced by roots. Our objective was to determine the potential for elevated CO2 to change N availability in an experimental plant-soil system by affecting the acquisition of root-derived C by soil microbes. We grew Populus tremuloides (trembling aspen) cuttings for 2 years under two levels of atmospheric CO2 (36.7 and 71.5 Pa) and at two levels of soil N (210 and 970 \u00b5g N g-1). Ambient and twice-ambient CO2 concentrations were applied using open-top chambers, and soil N availability was manipulated by mixing soils differing in organic N content. From June to October of the second growing season, we measured midday rates of soil respiration. In August, we pulse-labeled plants with 14CO2 and measured soil 14CO2 respiration and the 14C contents of plants, soils, and microorganisms after a 6-day chase period. In conjunction with the August radio-labeling and again in October, we used 15N pool dilution techniques to measure in situ rates of gross N mineralization, N immobilization by microbes, and plant N uptake. At both levels of soil N availability, elevated CO2 significantly increased whole-plant and root biomass, and marginally increased whole-plant N capital. Significant increases in soil respiration were closely linked to increases in root biomass under elevated CO2. CO2 enrichment had no significant effect on the allometric distribution of biomass or 14C among plant components, total 14C allocation belowground, or cumulative (6-day) 14CO2 soil respiration. Elevated CO2 significantly increased microbial 14C contents, indicating greater availability of microbial substrates derived from roots. The near doubling of microbial 14C contents at elevated CO2 was a relatively small quantitative change in the belowground C cycle of our experimental system, but represents an ecologically significant effect on the dynamics of microbial growth. Rates of plant N uptake during both 6-day periods in August and October were significantly greater at elevated CO2, and were closely related to fine-root biomass. Gross N mineralization was not affected by elevated CO2. Despite significantly greater rates of N immobilization under elevated CO2, standing pools of microbial N were not affected by elevated CO2, suggesting that N was cycling through microbes more rapidly. Our results contained elements of both positive and negative feedback hypotheses, and may be most relevant to young, aggrading ecosystems, where soil resources are not yet fully exploited by plant roots. If the turnover of microbial N increases, higher rates of N immobilization may not decrease N availability to plants under elevated CO2.", "keywords": ["0106 biological sciences", "root-: biomass-", "Ecology and Evolutionary Biology", "nitrogen-fixation", "Environmental-Sciences)", "01 natural sciences", "nitrogen", "biomass-", "nitrogen-cycle", "nitrogen-", "Microorganisms-", "carbon-14", "124-38-9: CARBON DIOXIDE", "C Cycle", "Spermatophytes-", "Spermatophyta-", "Key Words Atmospheric CO2", "Cellular and Developmental Biology", "Populus Tremuloides Michx", "2. Zero hunger", "carbon-dioxide: atmospheric-", "plant-nutrition", "Climatology- (Environmental-Sciences)", "Angiosperms-", "Angiospermae-", "Plants-", "Natural Resources and Environment", "04 agricultural and veterinary sciences", "global-climate-change", "microbe- (Microorganisms-)", "7727-37-9: NITROGEN", "chemical-composition", "carbon-sequestration", "mineral-uptake", "soil-biology", "Science", "Vascular-Plants", "poplars-", "respiration-", "carbon-dioxide-enrichment", "carbon-dioxide", "Populus-tremuloides [trembling-aspen] (Salicaceae-)", "carbon-cycle", "Health Sciences", "Salicaceae-: Dicotyledones-", "soil-respiration", "content", "Plantae-", "14762-75-5: CARBON-14", "mineralization-", "Molecular", "forest-soils", "15. Life on land", "Rhizodeposition", "soil-flora", "N Cycle", "13. Climate action", "cuttings-", "roots-", "Legacy", "Terrestrial-Ecology (Ecology-", "0401 agriculture", " forestry", " and fisheries", "Dicots-", "ecosystems-"], "contacts": [{"organization": "Mikan, Carl J., Zak, Donald R., Kubiske, Mark E., Pregitzer, Kurt S.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1007/pl00008869"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/pl00008869", "name": "item", "description": "10.1007/pl00008869", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/pl00008869"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2000-08-23T00:00:00Z"}}, {"id": "10.1007/s00248-013-0225-0", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:21Z", "type": "Journal Article", "created": "2013-04-15", "title": "Agricultural Management And Labile Carbon Additions Affect Soil Microbial Community Structure And Interact With Carbon And Nitrogen Cycling", "description": "We investigated how conversion from conventional agriculture to organic management affected the structure and biogeochemical function of soil microbial communities. We hypothesized the following. (1) Changing agricultural management practices will alter soil microbial community structure driven by increasing microbial diversity in organic management. (2) Organically managed soil microbial communities will mineralize more N and will also mineralize more N in response to substrate addition than conventionally managed soil communities. (3) Microbial communities under organic management will be more efficient and respire less added C. Soils from organically and conventionally managed agroecosystems were incubated with and without glucose ((13)C) additions at constant soil moisture. We extracted soil genomic DNA before and after incubation for TRFLP community fingerprinting of soil bacteria and fungi. We measured soil C and N pools before and after incubation, and we tracked total C respired and N mineralized at several points during the incubation. Twenty years of organic management altered soil bacterial and fungal community structure compared to continuous conventional management with the bacterial differences caused primarily by a large increase in diversity. Organically managed soils mineralized twice as much NO3 (-) as conventionally managed ones (44 vs. 23 \u03bcg N/g soil, respectively) and increased mineralization when labile C was added. There was no difference in respiration, but organically managed soils had larger pools of C suggesting greater efficiency in terms of respiration per unit soil C. These results indicate that the organic management induced a change in community composition resulting in a more diverse community with enhanced activity towards labile substrates and greater capacity to mineralize N.", "keywords": ["0301 basic medicine", "2. Zero hunger", "0303 health sciences", "Environmental Microbiology and Microbial Ecology", "Bacteria", "Nitrogen", "Fungal Community Structure", "Agriculture", "Nitrogen Cycle", "15. Life on land", "Microbiology", "630", "Carbon", "Carbon Cycle", "Soil", "03 medical and health sciences", "rRNA Gene Copy", "Soil Microbial Community Structure", "fungal community", "Biology", "Ecosystem", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1007/s00248-013-0225-0"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Microbial%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00248-013-0225-0", "name": "item", "description": "10.1007/s00248-013-0225-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00248-013-0225-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-04-16T00:00:00Z"}}, {"id": "10.1007/s00267-011-9642-3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:22Z", "type": "Journal Article", "created": "2011-03-08", "title": "C And N Content In Density Fractions Of Whole Soil And Soil Size Fraction Under Cacao Agroforestry Systems And Natural Forest In Bahia, Brazil", "description": "Agroforestry systems (AFSs) have an important role in capturing above and below ground soil carbon and play a dominant role in mitigation of atmospheric CO(2). Attempts has been made here to identify soil organic matter fractions in the cacao-AFSs that have different susceptibility to microbial decomposition and further represent the basis of understanding soil C dynamics. The objective of this study was to characterize the organic matter density fractions and soil size fractions in soils of two types of cacao agroforestry systems and to compare with an adjacent natural forest in Bahia, Brazil. The land-use systems studied were: (1) a 30-year-old stand of natural forest with cacao (cacao cabruca), (2) a 30-year-old stand of cacao with Erythrina glauca as shade trees (cacao\u00a0+\u00a0erythrina), and (3) an adjacent natural forest without cacao. Soil samples were collected from 0-10\u00a0cm depth layer in reddish-yellow Oxisols. Soil samples was separated by wet sieving into five fraction-size classes (>2000\u00a0\u03bcm, 1000-2000\u00a0\u03bcm, 250-1000\u00a0\u03bcm, 53-250\u00a0\u03bcm, and <53\u00a0\u03bcm). C and N accumulated in to the light (free- and intra-aggregate density fractions) and heavy fractions of whole soil and soil size fraction were determined. Soil size fraction obtained in cacao AFS soils consisted mainly (65 %) of mega-aggregates (>2000\u00a0\u03bcm) mixed with macroaggregates (32-34%), and microaggregates (1-1.3%). Soil organic carbon (SOC) and total N content increased with increasing soil size fraction in all land-use systems. Organic C-to-total N ratio was higher in the macroaggregate than in the microaggregate. In general, in natural forest and cacao cabruca the contribution of C and N in the light and heavy fractions was similar. However, in cacao\u00a0+\u00a0erythrina the heavy fraction was the most common and contributed 67% of C and 63% of N. Finding of this study shows that the majority of C and N in all three systems studied are found in macroaggregates, particularly in the 250-1000\u00a0\u03bcm size aggregate class. The heavy fraction was the most common organic matter fraction in these soils. Thus, in mature cacao AFS on highly weathered soils the main mechanisms of C stabilization could be the physical protection within macroaggregate structures thereby minimizing the impact of conversion of forest to cacao AFS.", "keywords": ["2. Zero hunger", "Cacao", "Nitrogen", "Agriculture", "Forestry", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "Carbon", "Carbon Cycle", "Soil", "0401 agriculture", " forestry", " and fisheries", "Particle Size", "Brazil", "Erythrina", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s00267-011-9642-3"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00267-011-9642-3", "name": "item", "description": "10.1007/s00267-011-9642-3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00267-011-9642-3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-03-09T00:00:00Z"}}, {"id": "10.1007/s00442-002-0884-x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:30Z", "type": "Journal Article", "created": "2003-02-13", "title": "Forest Carbon Balance Under Elevated Co2", "description": "Free-air CO2 enrichment (FACE) technology was used to expose a loblolly pine (Pinus taeda L.) forest to elevated atmospheric CO2 (ambient + 200\u00a0\u00b5l l-1). After 4\u00a0years, basal area of pine trees was 9.2% larger in elevated than in ambient CO2 plots. During the first 3\u00a0years the growth rate of pine was stimulated by ~26%. In the fourth year this stimulation declined to 23%. The average net ecosystem production (NEP) in the ambient plots was 428\u00a0gC\u00a0m-2\u00a0year-1, indicating that the forest was a net sink for atmospheric CO2. Elevated atmospheric CO2 stimulated NEP by 41%. This increase was primarily an increase in plant biomass increment (57%), and secondarily increased accumulation of carbon in the forest floor (35%) and fine root increment (8%). Net primary production (NPP) was stimulated by 27%, driven primarily by increases in the growth rate of the pines. Total heterotrophic respiration (R h) increased by 165%, but total autotrophic respiration (R a) was unaffected. Gross primary production was increased by 18%. The largest uncertainties in the carbon budget remain in separating belowground heterotrophic (soil microbes) and autotrophic (root) respiration. If applied to temperate forests globally, the increase in NEP that we measured would fix less than 10% of the anthropogenic CO2 projected to be released into the atmosphere in the year 2050. This may represent an upper limit because rising global temperatures, land disturbance, and heterotrophic decomposition of woody tissues will ultimately cause an increased flux of carbon back to the atmosphere.", "keywords": ["Carbon sequestration", "Global carbon cycle", "0106 biological sciences", "Free-air CO enrichment 2", "Carbon dioxide", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Pinus taeda", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences"]}, "links": [{"href": "https://doi.org/10.1007/s00442-002-0884-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-002-0884-x", "name": "item", "description": "10.1007/s00442-002-0884-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-002-0884-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-04-01T00:00:00Z"}}, {"id": "10.1007/s00442-011-1904-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:31Z", "type": "Journal Article", "created": "2011-01-25", "title": "Rapid Top-Down Regulation Of Plant C:N:P Stoichiometry By Grasshoppers In An Inner Mongolia Grassland Ecosystem", "description": "Understanding how food web interactions alter the processing of limiting nutrient elements is an important goal of ecosystem ecology. An experiment manipulating densities of the grasshopper Oedaleus asiaticus was performed to assess top-down effects of grasshoppers on C:N:P stoichiometry of plants and soil in a grassland ecosystem in Inner Mongolia (China). With increased grasshopper feeding, plant biomass declined fourfold, litter abundance increased 30%, and the plant community became dominated by non-host plant taxa. Plant stoichiometric response depended on whether or not the plant was a grasshopper host food species: C:N and C:P ratios increased with increasing grasshopper density (GD) for host plants but decreased in non-host plants. These data suggest either a direct transfer of grasshopper-recycled nutrients from host to non-host plants or a release of non-host plants from nutrient competition with heavily grazed host plants. Litterfall C:N and C:P decreased across moderate levels of grasshopper density but no effects on C:N:P stoichiometry in the surface soil were observed, possibly due to the short experimental period. Our observations of divergent C:N:P stoichiometric response among plant species highlight the important role of grasshopper herbivory in regulating plant community structure and nutrient cycling in grassland ecosystems.", "keywords": ["Male", "2. Zero hunger", "0106 biological sciences", "0301 basic medicine", "Nitrogen", "Phosphorus", "Grasshoppers", "Mongolia", "Nitrogen Cycle", "Plants", "15. Life on land", "01 natural sciences", "Carbon", "Carbon Cycle", "Soil", "03 medical and health sciences", "Animals", "Female", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1007/s00442-011-1904-5"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-011-1904-5", "name": "item", "description": "10.1007/s00442-011-1904-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-011-1904-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-01-26T00:00:00Z"}}, {"id": "10.1007/s00442-011-2133-7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:31Z", "type": "Journal Article", "created": "2011-10-04", "title": "Soil Warming Alters Nitrogen Cycling In A New England Forest: Implications For Ecosystem Function And Structure", "description": "Global climate change is expected to affect terrestrial ecosystems in a variety of ways. Some of the more well-studied effects include the biogeochemical feedbacks to the climate system that can either increase or decrease the atmospheric load of greenhouse gases such as carbon dioxide and nitrous oxide. Less well-studied are the effects of climate change on the linkages between soil and plant processes. Here, we report the effects of soil warming on these linkages observed in a large field manipulation of a deciduous forest in southern New England, USA, where soil was continuously warmed 5\u00b0C above ambient for 7 years. Over this period, we have observed significant changes to the nitrogen cycle that have the potential to affect tree species composition in the long term. Since the start of the experiment, we have documented a 45% average annual increase in net nitrogen mineralization and a three-fold increase in nitrification such that in years 5 through 7, 25% of the nitrogen mineralized is then nitrified. The warming-induced increase of available nitrogen resulted in increases in the foliar nitrogen content and the relative growth rate of trees in the warmed area. Acer rubrum (red maple) trees have responded the most after 7 years of warming, with the greatest increases in both foliar nitrogen content and relative growth rates. Our study suggests that considering species-specific responses to increases in nitrogen availability and changes in nitrogen form is important in predicting future forest composition and feedbacks to the climate system.", "keywords": ["Ecosystem ecology - Original Paper", "0106 biological sciences", "550", "Nitrogen", "Climate Change", "Population Dynamics", "Acer", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "15. Life on land", "Nitrate Reductase", "01 natural sciences", "Trees", "Soil", "Species Specificity", "New England", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Ecology", " Evolution", " Behavior and Systematics", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1007/s00442-011-2133-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-011-2133-7", "name": "item", "description": "10.1007/s00442-011-2133-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-011-2133-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-10-05T00:00:00Z"}}, {"id": "10.1007/s00442-012-2331-y", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:31Z", "type": "Journal Article", "created": "2012-05-03", "title": "Legacy Effects Of Drought On Plant Growth And The Soil Food Web", "description": "Soils deliver important ecosystem services, such as nutrient provision for plants and the storage of carbon (C) and nitrogen (N), which are greatly impacted by drought. Both plants and soil biota affect soil C and N availability, which might in turn affect their response to drought, offering the potential to feed back on each other's performance. In a greenhouse experiment, we compared legacy effects of repeated drought on plant growth and the soil food web in two contrasting land-use systems: extensively managed grassland, rich in C and with a fungal-based food web, and intensively managed wheat lower in C and with a bacterial-based food web. Moreover, we assessed the effect of plant presence on the recovery of the soil food web after drought. Drought legacy effects increased plant growth in both systems, and a plant strongly reduced N leaching. Fungi, bacteria, and their predators were more resilient after drought in the grassland soil than in the wheat soil. The presence of a plant strongly affected the composition of the soil food web, and alleviated the effects of drought for most trophic groups, regardless of the system. This effect was stronger for the bottom trophic levels, whose resilience was positively correlated to soil available C. Our results show that plant belowground inputs have the potential to affect the recovery of belowground communities after drought, with implications for the functions they perform, such as C and N cycling.", "keywords": ["0106 biological sciences", "570", "Food Chain", "Nematoda", "Nitrogen", "577", "Biological Availability", "Plant Development", "Poaceae", "01 natural sciences", "Soil fauna", "Soil", "Animals", "Herbivory", "Ecosystem", "Soil Microbiology", "Triticum", "2. Zero hunger", "Bacteria", "Fungi", "Nitrogen Cycle", "Plants", "15. Life on land", "Carbon", "6. Clean water", "Droughts", "England", "13. Climate action", "Wheat"]}, "links": [{"href": "https://doi.org/10.1007/s00442-012-2331-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-012-2331-y", "name": "item", "description": "10.1007/s00442-012-2331-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-012-2331-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-05-04T00:00:00Z"}}, {"id": "10.1007/s00442-012-2471-0", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:32Z", "type": "Journal Article", "created": "2012-10-03", "title": "Ectomycorrhizal Fungal Succession Coincides With Shifts In Organic Nitrogen Availability And Canopy Closure In Post-Wildfire Jack Pine Forests", "description": "Successional changes in belowground ectomycorrhizal fungal (EMF) communities have been observed with increasing forest stand age; however, mechanisms behind this change remain unclear. It has been hypothesized that declines of inorganic nitrogen (N) and increases of organic N influence changes in EMF taxa over forest development. In a post-wildfire chronosequence of six jack pine (Pinus banksiana) stands ranging in age from 5 to 56 years, we investigated EMF community composition and compared shifts in taxa with detailed soluble inorganic and organic N data. Taxa were identified by internal transcribed spacer rDNA sequencing, and changes in community composition evaluated with non-metric multi-dimensional scaling (NMDS). Dissimilarities in the community data were tested for correlations with N variables. We observed a successional shift along NMDS axis 1 from such taxa as Suillus brevipes and Thelephora terrestris in sites age 5 and 11 to species of Cortinarius and Russula, among others, in the four older sites. This change was positively correlated with soluble organic N (SON) (r(2) = 0.902, P = 0.033) and free amino-acid N (r(2) = 0.945, P = 0.021), but not inorganic N. Overall, our results show a successional shift of EMF communities occurring between stand initiation and canopy closure without a change in species of the dominant plant-host, and associated with SON and free amino-acid N in soil. It is uncertain whether EMF taxa are responding to these organic N forms directly, affecting their availability, or are ultimately responding to changes in other site variables, such as belowground productivity.", "keywords": ["0106 biological sciences", "Mycorrhizae", "DNA", " Ribosomal Spacer", "Population Dynamics", "0401 agriculture", " forestry", " and fisheries", "Biodiversity", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "15. Life on land", "Pinus", "01 natural sciences", "Fires"]}, "links": [{"href": "https://doi.org/10.1007/s00442-012-2471-0"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-012-2471-0", "name": "item", "description": "10.1007/s00442-012-2471-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-012-2471-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-10-04T00:00:00Z"}}, {"id": "10.1007/s00442-012-2484-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:32Z", "type": "Journal Article", "created": "2012-12-27", "title": "Herbivore Trampling As An Alternative Pathway For Explaining Differences In Nitrogen Mineralization In Moist Grasslands", "description": "Studies addressing the role of large herbivores on nitrogen cycling in grasslands have suggested that the direction of effects depends on soil fertility. Via selection for high quality plant species and input of dung and urine, large herbivores have been shown to speed up nitrogen cycling in fertile grassland soils while slowing down nitrogen cycling in unfertile soils. However, recent studies show that large herbivores can reduce nitrogen mineralization in some temperate fertile soils, but not in others. To explain this, we hypothesize that large herbivores can reduce nitrogen mineralization in loamy or clay soils through soil compaction, but not in sandy soils. Especially under wet conditions, strong compaction in clay soils can lead to periods of soil anoxia, which reduces decomposition of soil organic matter and, hence, N mineralization. In this study, we use a long-term (37-year) field experiment on a salt marsh to investigate the hypothesis that the effect of large herbivores on nitrogen mineralization depends on soil texture. Our results confirm that the presence of large herbivores decreased nitrogen mineralization rate in a clay soil, but not in a sandy soil. By comparing a hand-mown treatment with a herbivore-grazed treatment, we show that these differences can be attributed to herbivore-induced changes in soil physical properties rather than to above-ground biomass removal. On clay soil, we find that large herbivores increase the soil water-filled porosity, induce more negative soil redox potentials, reduce soil macrofauna abundance, and reduce decomposition activity. On sandy soil, we observe no changes in these variables in response to grazing. We conclude that effects of large herbivores on nitrogen mineralization cannot be understood without taking soil texture, soil moisture, and feedbacks through soil macrofauna into account.", "keywords": ["0106 biological sciences", "IMPACT", "Nitrogen", "01 natural sciences", "Soil fauna", "COMPACTION", "Soil", "SOIL PHYSICAL-PROPERTIES", "SALT-MARSH", "Large herbivores", "Soil texture", "Animals", "Biomass", "Herbivory", "Soil compaction", "Ecosystem", "2. Zero hunger", "UNGULATE", "national", "Water", "DENITRIFICATION", "Nitrogen Cycle", "15. Life on land", "N cycling", "YELLOWSTONE-NATIONAL-PARK", "PLANT-GROWTH", "13. Climate action", "ECOSYSTEM", "Clay", "Aluminum Silicates", "Soil moisture", "BAIT-LAMINA TEST"]}, "links": [{"href": "https://doi.org/10.1007/s00442-012-2484-8"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-012-2484-8", "name": "item", "description": "10.1007/s00442-012-2484-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-012-2484-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-12-28T00:00:00Z"}}, {"id": "10.1007/s00442-013-2733-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:32Z", "type": "Journal Article", "created": "2013-08-08", "title": "Nitrogen Dynamics In Arctic Tundra Soils Of Varying Age: Differential Responses To Fertilization And Warming", "description": "In the foothills of the Brooks Range, Alaska, different glaciation histories have created landscapes with varying soil age. Productivity of most of these landscapes is generally N limited, but varies widely, as do plant species composition and soil properties (e.g., pH). We hypothesized that the projected changes in productivity and vegetation composition under a warmer climate might be mediated through differential changes in N availability across soil age. We compared readily available [water-soluble NH4 (+), NO3 (-), and amino acids (AA)], moderately available (soluble proteins), hydrolyzable, and total N pools across three tussock-tundra landscapes with soil ages ranging from 11.5k to 300k years. The effects of fertilization and warming on these N pools were also compared for the two younger sites. Readily available N was highest at the oldest site, and AA accounted for 80-89 % of this N. At the youngest site, inorganic N constituted the majority (80-97 %) of total readily available N. This variation reflected the large differences in plant functional group composition and soil chemical properties. Long-term (8-16 years) fertilization increased the soluble inorganic N by 20- to 100-fold at the intermediate-age site, but only by twofold to threefold at the youngest site. Warming caused small and inconsistent changes in the soil C:N ratio and AA, but only in soils beneath Eriophorum vaginatum, the dominant tussock-forming sedge. These differential responses suggest that the ecological consequences of warmer climates on these tundra ecosystems are more complex than simply elevated N-mineralization rates, and that the responses of landscapes might be impacted by soil age, or time since deglaciation.", "keywords": ["0106 biological sciences", "Arctic Regions", "Nitrogen", "Climate Change", "Nitrogen Cycle", "15. Life on land", "01 natural sciences", "Soil", "13. Climate action", "Ice Cover", "Biomass", "Cyperaceae", "Fertilizers", "Alaska", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1007/s00442-013-2733-5"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-013-2733-5", "name": "item", "description": "10.1007/s00442-013-2733-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-013-2733-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-08-09T00:00:00Z"}}, {"id": "10.1007/s00442-015-3290-x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:32Z", "type": "Journal Article", "created": "2015-03-19", "title": "The Priming Effect Of Soluble Carbon Inputs In Organic And Mineral Soils From A Temperate Forest", "description": "The priming effect (PE) is one of the most important interactions between C input and output in soils. Here we aim to quantify patterns of PE in response to six addition rates of (13)C-labeled water-soluble C (WSC) and determine if these patterns are different between soil organic and mineral layers in a temperate forest. Isotope mass balance was used to distinguish WSC derived from SOC-derived CO2 respiration. The relative PE was 1.1-3.3 times stronger in the mineral layer than in the organic layer, indicating higher sensitivity of the mineral layer to WSC addition. However, the magnitude of cumulative PE was significantly higher in the organic layer than in the mineral layer due to higher SOC in the organic layer. With an increasing WSC addition rate, cumulative PE increased for both layers, but tended to level off when the addition rate was higher than 400 mg C kg(-1) soil. This saturation effect indicates that stimulation of soil C loss by exogenous substrate would not be as drastic as the increase of C input. In fact, we found that the mineral layer with an WSC addition rate of 160-800 mg C kg(-1) soil had net C storage although positive PE was observed. The addition of WSC basically caused net C loss in the organic layer due to the high magnitude of PE, pointing to the importance of the organic layer in C cycling of forest ecosystems. Our findings provide a fundamental understanding of PE on SOC mineralization of forest soils and warrant further in situ studies of PE in order to better understand C cycling under global climate change.", "keywords": ["Carbon Isotopes", "Minerals", "Climate", "Climate Change", "04 agricultural and veterinary sciences", "Carbon Dioxide", "Forests", "15. Life on land", "Carbon", "Carbon Cycle", "Trees", "Soil", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Betula", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1007/s00442-015-3290-x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-015-3290-x", "name": "item", "description": "10.1007/s00442-015-3290-x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-015-3290-x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2015-03-20T00:00:00Z"}}, {"id": "10.1007/s00442-015-3543-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:32Z", "type": "Journal Article", "created": "2016-01-08", "title": "Coupled Long-Term Summer Warming And Deeper Snow Alters Species Composition And Stimulates Gross Primary Productivity In Tussock Tundra", "description": "Climate change is expected to increase summer temperature and winter precipitation throughout the Arctic. The long-term implications of these changes for plant species composition, plant function, and ecosystem processes are difficult to predict. We report on the influence of enhanced snow depth and warmer summer temperature following 20 years of an ITEX experimental manipulation at Toolik Lake, Alaska. Winter snow depth was increased using snow fences and warming was accomplished during summer using passive open-top chambers. One of the most important consequences of these experimental treatments was an increase in active layer depth and rate of thaw, which has led to deeper drainage and lower soil moisture content. Vegetation concomitantly shifted from a relatively wet system with high cover of the sedge Eriophorum vaginatum to a drier system, dominated by deciduous shrubs including Betula nana and Salix pulchra. At the individual plant level, we observed higher leaf nitrogen concentration associated with warmer temperatures and increased snow in S. pulchra and B. nana, but high leaf nitrogen concentration did not lead to higher rates of net photosynthesis. At the ecosystem level, we observed higher GPP and NEE in response to summer warming. Our results suggest that deeper snow has a cascading set of biophysical consequences that include a deeper active layer that leads to altered species composition, greater leaf nitrogen concentration, and higher ecosystem-level carbon uptake.", "keywords": ["0106 biological sciences", "570", "Nitrogen", "Climate Change", "Salix", "Biodiversity", "15. Life on land", "01 natural sciences", "Carbon Cycle", "Plant Leaves", "13. Climate action", "Snow", "Seasons", "Tundra", "Alaska", "Betula", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1007/s00442-015-3543-8"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Oecologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s00442-015-3543-8", "name": "item", "description": "10.1007/s00442-015-3543-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-015-3543-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-01-08T00:00:00Z"}}, {"id": "10.1007/s10021-013-9650-7", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:36Z", "type": "Journal Article", "created": "2013-02-21", "title": "Stimulation Of Different Functional Groups Of Bacteria By Various Plant Residues As A Driver Of Soil Priming Effect", "description": "The turnover of organic matter in soil depends on the activity of microbial decomposers. However, little is known about how modifications of the diversity of soil microbial communities induced by fresh organic matter (FOM) inputs can regulate carbon cycling. Here, we investigated the decomposition of two 13C labeled crop residues (wheat and alfalfa) and the dynamics of the genetic structure and taxonomic composition of the soil bacterial communities decomposing 13C labeled FOM and native unlabeled soil organic matter (SOM), respectively. It was achieved by combining the stable isotope probing method with molecular tools (DNA genotyping and pyrosequencing of 16S rDNA). Although a priming effect (PE) was always induced by residue addition, its intensity increased with the degradability of the plant residue. The input of both wheat and alfalfa residues induced a rapid dynamics of FOM-degrading communities, corresponding to the stimulation of bacterial phyla which have been previously described as copiotrophic organisms. However, the dynamics and the identity of the bacterial groups stimulated depended on the residue added, with Firmicutes dominating in the wheat treatment and Proteobacteria dominating in the alfalfa treatment after 3\u00a0days of incubation. In both treatments, SOM-degrading communities were dominated by Acidobacteria, Verrucomicrobia, and Gemmatimonadetes phyla which have been previously described as oligotrophic organisms. An early stimulation of SOM-degrading populations mainly belonging to Firmicutes and Bacteroidetes groups was observed in the alfalfa treatment whereas no change occurred in the wheat treatment. Our findings support the hypothesis that the succession of bacterial taxonomic groups occurring in SOM- and FOM-degrading communities during the degradation process may be an important driver of the PE, and consequently of carbon dynamics in soil.", "keywords": ["0301 basic medicine", "2. Zero hunger", "570", "0303 health sciences", "[SDE.MCG]Environmental Sciences/Global Changes", "bacterial diversity", "[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study", "15. Life on land", "[SDV.MP.BAC]Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology", "630", "soil", "[SDE.MCG] Environmental Sciences/Global Changes", "03 medical and health sciences", "pyrosequencing", "[SDU.STU.GC]Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "soil organic matter", "carbon cycle", "[SDU.STU.GC] Sciences of the Universe [physics]/Earth Sciences/Geochemistry", "[SDV.MP.BAC] Life Sciences [q-bio]/Microbiology and Parasitology/Bacteriology", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "stable isotope probing"]}, "links": [{"href": "https://doi.org/10.1007/s10021-013-9650-7"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecosystems", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10021-013-9650-7", "name": "item", "description": "10.1007/s10021-013-9650-7", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10021-013-9650-7"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-02-22T00:00:00Z"}}, {"id": "10.1007/s10021-022-00802-4", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:37Z", "type": "Journal Article", "created": "2022-12-12", "title": "Pulse, Shunt and Storage: Hydrological Contraction Shapes Processing and Export of Particulate Organic Matter in River Networks", "description": "AbstractStreams and rivers act as landscape-scale bioreactors processing large quantities of terrestrial particulate organic matter (POM). This function is linked to their flow regime, which governs residence times, shapes organic matter reactivity and controls the amount of carbon (C) exported to the atmosphere and coastal oceans. Climate change impacts flow regimes by increasing both flash floods and droughts. Here, we used a modelling approach to explore the consequences of lateral hydrological contraction, that is, the reduction of the wet portion of the streambed, for POM decomposition and transport at the river network scale. Our model integrates seasonal leaf litter input as generator of POM, transient storage of POM on wet and dry streambed portions with associated decomposition and ensuing changes in reactivity, and transport dynamics through a dendritic river network. Simulations showed that the amount of POM exported from the river network and its average reactivity increased with lateral hydrological contraction, due to the combination of (1) low processing of POM while stored on dry streambeds, and (2) large shunting during flashy events. The sensitivity analysis further supported that high lateral hydrological contraction leads to higher export of higher reactivity POM, regardless of transport coefficient values, average reactivity of fresh leaf litter and differences between POM reactivity under wet and dry conditions. Our study incorporates storage in dry streambed areas into the pulse-shunt concept (Raymond and others in Ecology 97(1):5\uffe2\uff80\uff9316, 2016. https://doi.org/10.1890/14-1684.1), providing a mechanistic framework and testable predictions about leaf litter storage, transport and decomposition in fluvial networks.Soil moisture is among the most important factors regulating soil biodiversity and functioning. Models forecast changes in the precipitation regime in many areas of the planet, but how these changes will influence soil functioning, and how biotic drivers modulate such effects, is far from being understood. We evaluated the responses of C and N fluxes, and soil microbial properties to different soil water regimes in soils from the main three ecotypes of the world's largest and most diverse tropical savanna. Further, we explored the direct and indirect effects of changes in the ecotype and soil water regimes on these key soil processes. Soils from the woodland savanna showed a better nutritional status than the other ecotypes, as well as higher potential N cycling rates, N2O emissions, and soil bacterial abundance but lower bacterial richness, whereas potential CO2 emissions and CH4 uptake peaked in the intermediate savanna. The ecotype also modulated the effects of changes in the soil water regime on nutrient cycling, greenhouse gas fluxes, and soil bacterial properties, with more intense responses in the intermediate savanna. Further, we highlight the existence of multiple contrasting direct and indirect (via soil microbes and abiotic properties) effects of an intensification of the precipitation regime on soil C- and N-related processes. Our results confirm that ecotype is a fundamental driver of soil properties and functioning in the Cerrado and that it can determine the responses of key soil processes to changes in the soil water regime.Establishing parkland agroforestry on currently treeless cropland in the West African Sahel may help mitigate climate change. To evaluate its potential, we used climatically suitable ranges for parklands for 19 climate scenarios, derived by ecological niche modeling, for estimating potential carbon stocks in parkland and treeless cropland. A biocarbon business model was used to evaluate profitability of hypothetical Terrestrial Carbon Projects (TCPs), across a range of farm sizes, farm numbers, carbon prices and benefit sharing mechanisms. Using climate analogues, we explored potential climate change trajectories for selected locations. If mature parklands covered their maximum range, carbon stocks in Sahelian productive land would be about 1,284\uffc2\uffa0Tg, compared to 725\uffc2\uffa0Tg in a treeless scenario. Due to slow increase rates of total system carbon by 0.4\uffc2\uffa0Mg\uffc2\uffa0C\uffc2\uffa0ha\uffe2\uff88\uff921 a\uffe2\uff88\uff921, most TCPs at carbon prices that seem realistic today were not feasible, or required the participation of large numbers of farmers. For small farms, few TCP scenarios were feasible, and low Net Present Values for farmers made it unlikely that carbon payments would motivate many to participate in TCPs, unless additional benefits were provided. Climate analogue locations indicated an uncertain climate trajectory for the Sahel, but most scenarios projected increasing aridity and reduced suitability for parklands. The potentially severe impacts of climate change on Sahelian ecosystems and the uncertain profitability of TCPs make the Sahel highly risky for carbon investments. Given the likelihood of degrading environmental conditions, the search for appropriate adaptation strategies should take precedence over promoting mitigation activities.
", "keywords": ["Carbon sequestration", "Carbon accounting", "Atmospheric Science", "Adaptation to Climate Change in Agriculture", "Economics", "Profitability index", "7. Clean energy", "01 natural sciences", "agroforestry", "Agricultural and Biological Sciences", "Climate change mitigation", "Range (aeronautics)", "Rangeland Degradation", "Natural resource economics", "Soil water", "11. Sustainability", "Rangeland Degradation and Pastoral Livelihoods", "Carbon fibers", "Climate change", "Business", "agriculture", "2. Zero hunger", "Global and Planetary Change", "Ecology", "Life Sciences", "Composite number", "04 agricultural and veterinary sciences", "Soil carbon", "Physical Sciences", "Composite material", "Atmospheric carbon cycle", "Management", " Monitoring", " Policy and Law", "Greenhouse gas", "Environmental science", "Global Forest Transition", "Agroforestry", "climate", "Biology", "Ecology", " Evolution", " Behavior and Systematics", "Ecosystem", "0105 earth and related environmental sciences", "Soil science", "15. Life on land", "carbon sequestration", "Materials science", "Carbon dioxide", "13. Climate action", "FOS: Biological sciences", "Environmental Science", "0401 agriculture", " forestry", " and fisheries", "Drivers and Impacts of Tropical Deforestation", "Finance"]}, "links": [{"href": "https://doi.org/10.1007/s10584-012-0438-0"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Climatic%20Change", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10584-012-0438-0", "name": "item", "description": "10.1007/s10584-012-0438-0", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10584-012-0438-0"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-03-28T00:00:00Z"}}, {"id": "10.1007/s10661-012-2795-6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:14:46Z", "type": "Journal Article", "created": "2012-07-24", "title": "Temporal Changes Of Soil Respiration Under Different Tree Species", "description": "Soil respiration rates were measured monthly (from April 2007 to March 2008) under four adjacent coniferous plantation sites [Oriental spruce (Picea orientalis L.), Austrian pine (Pinus nigra Arnold), Turkish fir (Abies bornmulleriana L.), and Scots pine (Pinus sylvestris L.)] and adjacent natural Sessile oak forest (Quercus petraea L.) in Belgrad Forest-Istanbul/Turkey. Also, soil moisture, soil temperature, and fine root biomass were determined to identify the underlying environmental variables among sites which are most likely causing differences in soil respiration. Mean annual soil moisture was determined to be between 6.3\u00a0% and 8.1\u00a0%, and mean annual temperature ranged from 13.0\u00b0C to 14.2\u00b0C under all species. Mean annual fine root biomass changed between 368.09\u00a0g/m(2) and 883.71\u00a0g/m(2) indicating significant differences among species. Except May 2007, monthly soil respiration rates show significantly difference among species. However, focusing on tree species, differences of mean annual respiration rates did not differ significantly. Mean annual soil respiration ranged from 0.56 to 1.09\u00a0g\u2009C/m(2)/day. The highest rates of soil respiration reached on autumn months and the lowest rates were determined on summer season. Soil temperature, soil moisture, and fine root biomass explain mean annual soil respiration rates at the highest under Austrian pine (R (2)\u2009=\u20090.562) and the lowest (R (2)\u2009=\u20090.223) under Turkish fir.", "keywords": ["0106 biological sciences", "Turkey", "Temperature", "04 agricultural and veterinary sciences", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Carbon Cycle", "Trees", "Soil", "Rhizosphere", "0401 agriculture", " forestry", " and fisheries", "Soil Microbiology", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10.1007/s10661-012-2795-6"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Monitoring%20and%20Assessment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10661-012-2795-6", "name": "item", "description": "10.1007/s10661-012-2795-6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10661-012-2795-6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-07-26T00:00:00Z"}}, {"id": "10.1016/j.foreco.2008.02.005", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:08Z", "type": "Journal Article", "created": "2008-03-12", "title": "Why Does Rainfall Affect The Trend In Soil Carbon After Converting Pastures To Forests? A Possible Explanation Based On Nitrogen Dynamics", "description": "Abstract When trees are planted onto former pastures, soil carbon stocks typically either remain constant or decrease, with decreases more common in regions with higher rainfall. We conducted a modelling analysis to assess whether those changes in soil carbon, especially the interaction with rainfall, could be understood through consideration of nitrogen balances. The study was based on simulations with the whole-system ecophysiological model CenW which allowed explicit modelling of both carbon and nitrogen pools and their fluxes through plants and soil organic matter. We found that in a modelled coniferous forest without excess water input, total system nitrogen stocks remained similar to pre-forestation values because there were few pathways for nitrogen losses, and without biological nitrogen fixation or fertiliser inputs, gains were restricted to small inputs from atmospheric deposition. However, tree biomass and the litter layer accumulated considerable amounts of nitrogen. This accumulation of nitrogen came at the expense of depleting soil nitrogen stocks. With the change from input of grass litter that is low in lignin to forest litter with higher lignin concentration, organic-matter C:N ratios increased so that more carbon could be stored per unit of soil nitrogen which partly negated the effect of reduced nitrogen stocks. The increase in C:N ratios was initially confined to the surface litter layer because of slow transfer of material to the mineral soil. Over a period of decades, soil C:N ratios eventually increased in the soil as well. Simulations with different amounts of precipitation showed that greater amounts of nitrogen were leached from systems where water supply exceeded the plants\u2019 requirements. Reduced nitrogen stocks then caused a subsequent reduction in soil organic carbon stocks. These simulations thus provided a consistent explanation for the observation of greater losses of soil organic carbon in high-rainfall systems after converting pastures to forests. More generally, the simulations showed that explicit modelling of the nitrogen cycle can put important constraints on possible changes in soil-carbon stocks that may occur after land-use change.", "keywords": ["land use change", "Rainfall", "Mitigation", "ecophysiology", "nitrogen cyc Afforestation", "Greenhouse", "Nitrogen", "Rain", "CenW", "Land-use change", "lignin", "Greenhouse effect", "afforestation", "carbon cycle", "Forest", "Reforestation", "Keywords: Carbon", "2. Zero hunger", "atmospheric deposition", "Nitrogen dynamics", "04 agricultural and veterinary sciences", "15. Life on land", "Carbon", "13. Climate action", "Land use", "ecological modeling", "0401 agriculture", " forestry", " and fisheries", "grassland"], "contacts": [{"organization": "Roger M. Gifford, Miko U. F. Kirschbaum, Miko U. F. Kirschbaum, Lan Bin Guo,", "roles": ["creator"]}]}, "links": [{"href": "https://openresearch-repository.anu.edu.au/bitstream/1885/61047/5/Kirschbaum_Rainfall_affect_in_soil_carbon.pdf.jpg"}, {"href": "https://openresearch-repository.anu.edu.au/bitstream/1885/61047/7/01_Kirschbaum_Why_does_rainfall_affect_the_2008.pdf.jpg"}, {"href": "https://doi.org/10.1016/j.foreco.2008.02.005"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Forest%20Ecology%20and%20Management", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.foreco.2008.02.005", "name": "item", "description": "10.1016/j.foreco.2008.02.005", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.foreco.2008.02.005"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-04-01T00:00:00Z"}}, {"id": "10.1007/s11104-021-05101-w", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:01Z", "type": "Journal Article", "created": "2021-08-21", "title": "Short-term impact of crop diversification on soil carbon fluxes and balance in rainfed and irrigated woody cropping systems under semiarid Mediterranean conditions", "description": "Abstract PurposeDiversification practices such as intercropping in woody cropping systems have recently been proposed as a promising management strategy for addressing problems related to soil degradation, climate change mitigation and food security. In this study, we assess the impact of several diversification practices in different management regimes on the main carbon fluxes regulating the soil carbon balance under semiarid Mediterranean conditions.
MethodsThe study was conducted in two nearby cropping systems: (i) a low input rainfed almond (Prunus dulcis Mill.) orchard cultivated on terraces and (ii) a levelled intensively irrigated mandarin (Citrus reticulata Blanco) orchard with a street-ridge morphology. The almond trees were intercropped with Capparis spinosa or with Thymus hyemalis While the mandarin trees were intercropped with a mixture of barley and vetch followed by fava bean. Changes caused by crop diversifications on C inputs into the soil and C outputs from the soil were estimated.
ResultsCrop diversification did not affect soil organic carbon stocks but did affect the carbon inputs and outputs regulating the soil carbon balance of above Mediterranean agroecosystems. Crop diversification with perennials in the low-input rainfed woody crop system significantly improved the annual soil C balance in the short-term. However, crop diversification with annual species in the intensively managed woody crop system had not effect on the annual soil C balance.
ConclusionsOur results highlight the potential of intercropping with perennials in rainfed woody crop systems for climate change mitigation through soil carbon sequestration.
", "keywords": ["2. Zero hunger", "Eroded carb\u00f3n", "Intercropping \u00b7 Agricultural practices \u00b7 Soil CO2 emissions \u00b7 Eroded carbon \u00b7 Plant carbon inputs \u00b7 Carbon cycle", "Intercropping \u00b7 Agricultural practices \u00b7 Soil CO2 emissions \u00b7 Eroded carbon \u00b7 Plant carbon inputs \u00b7 Carbon cycle", "Soil CO2 emissions", "Carbon cycle", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "Plant carbon inputs", "Agricultural practices", "Intercropping", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://link.springer.com/content/pdf/10.1007/s11104-021-05101-w.pdf"}, {"href": "https://doi.org/10.1007/s11104-021-05101-w"}, {"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": "10.1007/s11104-021-05101-w", "name": "item", "description": "10.1007/s11104-021-05101-w", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-021-05101-w"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-21T00:00:00Z"}}, {"id": "10.1016/j.agee.2003.12.008", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:16Z", "type": "Journal Article", "created": "2004-02-05", "title": "Effects Of Forest Conversion To Pasture On Soil Carbon Content And Dynamics In Brazilian Amazonia", "description": "Abstract Soils play an important role in the carbon cycle, and deforestation in the tropics affects both soil carbon storage and CO2 release into the atmosphere. The consequences of deforestation and conversion to pasture for soil carbon content and dynamics were examined in two soil types differing mainly by their texture. Two chronosequences were selected, each consisting of an intact forest and three pastures of different ages (4, 8, 15 years and 3, 9, 15 years, respectively). One chronosequence is located in the central part of the Brazilian Amazon basin, where the soils are clayey ferralsols, and the second in the Eastern Brazilian Amazon Basin, where the soils are sandy clayey acrisols. In the upper layer the C content of clayey soils was three times higher than in the sandy soils, but despite the differences in soil texture, the C distribution in the particle-size fractions was quite similar. In the two chronosequences, the conversion to pasture induced a slight increase in C content. Bulk density increases were greater on soils with lower clay contents. The 13 C measurements, which allowed to calculate the distribution of C derived from forest and from pasture, showed that all the particle-size fractions incorporated C derived from pasture and that a significant proportion of the young organic matter is rapidly trapped in the finest fractions. Although the proportions of pasture-derived C were higher in the sandy soils than in the clayey soils, the amounts of pasture-derived C in the particle-size fractions were 2\u20133 times larger in the clayey soils than in the sandy soils.", "keywords": ["rain-forest", "550", "ZONE TROPICALE", "c-13 natural abundance", "TEXTURE", "[SDV.SA.SDS]Life Sciences [q-bio]/Agricultural sciences/Soil study", "630", "Carbon Cycle", "C-13 isotope", "Amazonia", "EVOLUTION DES SOLS SOUS CULTURE", "STRUCTURE DU SOL", "soil carbon storage", "particle-size fractions", "Pasture", "cultivated oxisols", "ANALYSE ISOTOPIQUE", "SABLE", "eastern amazonia", "Deforestation", "[SDV.SA.SDS] Life Sciences [q-bio]/Agricultural sciences/Soil study", "Acrisol", "2. Zero hunger", "tropical soils Organic-matter dynamics", "Brasil", "size-fractions", "PATURAGE", "turnover", "Soil Carbon", "04 agricultural and veterinary sciences", "South America", "15. Life on land", "CARBONE ORGANIQUE", "STOCK ORGANIQUE", "ARGILE", "0401 agriculture", " forestry", " and fisheries", "DEFORESTATION", "texture"], "contacts": [{"organization": "Desjardins, T., Barros, E., Sarrazin, M., Girardin, C., Mariotti, A.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.agee.2003.12.008"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Agriculture%2C%20Ecosystems%20%26amp%3B%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.agee.2003.12.008", "name": "item", "description": "10.1016/j.agee.2003.12.008", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.agee.2003.12.008"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-07-01T00:00:00Z"}}, {"id": "10.5061/dryad.sn02v6x51", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:21:18Z", "type": "Dataset", "created": "2025-08-10", "title": "Herbivore grazing mitigates the negative effects of nitrogen deposition on soil organic carbon in low-diversity grassland", "description": "1. Changes in soil carbon (C) sequestration in grassland ecosystems have important impacts on the global C cycle. As such, it is important that researchers better understand the underlying mechanisms affecting soil C. Increasing evidence has shown that atmospheric nitrogen (N) deposition can cause dramatic changes in grassland soil C. It remains unclear whether herbivore grazing, a primary means to manage and utilize grassland resources, can regulate the effects of N deposition on soil C, and whether these effects are dependent on plant community diversity. 2. Here, we examined the joint effects of herbivore grazing and N-addition on soil organic C (SOC) stocks in two types of communities with low and high plant diversity, respectively. 3. Our results showed that the effects of N-addition and its combination with herbivore grazing on grassland SOC were inconsistent in the two types of communities. In the low-diversity community, N-addition greatly decreased SOC stocks, while grazing significantly increased it. Additionally, the grazing-induced increase in soil C stocks in presence of N-addition was so great that it completely counteracted the significant decline in SOC induced by N-addition. However, in the high-diversity community, we observed no effects of N-addition on SOC and grazing increased SOC only in the absence of N-addition and had no significant effect in presence of N-addition. 4. Synthesis and applications. Our study suggests that increased N deposition can trigger a remarkable reduction in soil C sequestration in grasslands with low plant diversity, but that herbivore grazing can offset this decline, which may help to mitigate greenhouse gas emissions caused by atmospheric N deposition. As a result, we suggest that moderate herbivore grazing should be considered as an effective grassland management measure for maintaining and improving grassland soil C sequestration as the increasing global change such as elevated atmospheric carbon dioxide, N deposition, and biodiversity losses threat.", "keywords": ["2. Zero hunger", "soil organic carbon", "global carbon cycle", "13. Climate action", "grassland management", "herbivore grazing", "atmospheric nitrogen deposition", "15. Life on land", "plant community composition"], "contacts": [{"organization": "Li, Guangyin, Cai, Jinting, Song, Xuxin, Pan, Xiaobin, Pan, Duofeng, Jiang, Shicheng, Sun, Jinyan, Zhang, Minna, Wang, Ling,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.sn02v6x51"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.sn02v6x51", "name": "item", "description": "10.5061/dryad.sn02v6x51", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.sn02v6x51"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-10-28T00:00:00Z"}}, {"id": "10.1016/j.scitotenv.2016.08.190", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:39Z", "type": "Journal Article", "created": "2016-09-11", "title": "Response Of Microbial Community Structure And Function To Short-Term Biochar Amendment In An Intensively Managed Bamboo (Phyllostachys Praecox) Plantation Soil: Effect Of Particle Size And Addition Rate", "description": "Biochar incorporated into soil has been known to affect soil nutrient availability and act as a habitat for microorganisms, both of which could be related to its particle size. However, little is known about the effect of particle size on soil microbial community structure and function. To investigate short-term soil microbial responses to biochar addition having varying particle sizes and addition rates, we established a laboratory incubation study. Biochar produced via pyrolysis of bamboo was ground into three particle sizes (diameter size<0.05mm (fine), 0.05-1.0mm (medium) and 1.0-2.0mm (coarse)) and amended at rates of 0% (control), 3% and 9% (w/w) in an intensively managed bamboo (Phyllostachys praecox) plantation soil. The results showed that the fine particle biochar resulted in significantly higher soil pH, electrical conductivity (EC), available potassium (K) concentrations than the medium and coarse particle sizes. The fine-sized biochar also induced significantly higher total microbial phospholipid fatty acids (PLFAs) concentrations by 60.28% and 88.94% than the medium and coarse particles regardless of addition rate, respectively. Redundancy analysis suggested that the microbial community structures were largely dependent of particle size, and that improved soil properties were key factors shaping them. The cumulative CO2 emissions from biochar-amended soils were 2-56% lower than the control and sharply decreased with increasing addition rates and particle sizes. Activities of \u03b1-glucosidase, \u03b2-glucosidase, \u03b2-xylosidase, N-acetyl-\u03b2-glucosaminidase, peroxidase and dehydrogenase decreased by ranging from 7% to 47% in biochar-amended soils over the control, indicating that biochar addition reduced enzyme activities involved carbon cycling capacity. Our results suggest that biochar addition can affect microbial population abundances, community structure and enzyme activities, that these effects are particle size and rate dependent. The fine particle biochar may additionally produce a better habitat for microorganisms compared to the other particle sizes.", "keywords": ["2. Zero hunger", "Soil", "Charcoal", "0401 agriculture", " forestry", " and fisheries", "04 agricultural and veterinary sciences", "Particle Size", "15. Life on land", "Poaceae", "Soil Microbiology", "6. Clean water", "Carbon Cycle"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2016.08.190"}, {"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.2016.08.190", "name": "item", "description": "10.1016/j.scitotenv.2016.08.190", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2016.08.190"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-01-01T00:00:00Z"}}, {"id": "10.1016/j.apsoil.2016.05.018", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:37Z", "type": "Journal Article", "created": "2016-06-11", "title": "Interactive Effects Of Precipitation Manipulation And Nitrogen Addition On Soil Properties In California Grassland And Shrubland", "description": "Abstract Soil microbial communities and pools of carbon (C) and nitrogen (N) play an important role in ecosystem responses to precipitation variability and N deposition. In southern California, ecosystem vulnerability to these environmental change drivers may differ for grassland versus shrubland vegetation types. We hypothesized that (1) these vegetation types would differ in their responses to precipitation and N manipulation; (2) reduced precipitation (\u201cdrought treatment\u201d) would have a negative effect on soil microbial abundance and alter microbial community composition, (3) these changes would be associated with reductions in soil C and N pools, (4) N addition would increase microbial abundance as well as soil C and N pools, and (5) combined drought and N deposition would have offsetting effects on soil properties. We tested these hypotheses at the Loma Ridge Global Change Experiment in southern California. Across vegetation types, we found that microbial biomass based on phospholipid fatty acids declined with drought and N addition. Microbial composition differed more strongly by vegetation type than with environmental change treatments. Added precipitation had little effect on microbial biomass but reduced labile C and N pools; these reductions were mitigated by N addition. Drought reduced labile forms of soil C and N, whereas N addition increased labile soil C pools and all soil N pools. Negative effects of drought and N addition were additive for microbial biomass, which could inhibit soil C cycling if both of these environmental changes occur together. Drought interacted with N addition to significantly increase the most labile N pool under the drought\u00a0+\u00a0N treatment, which suggests a build-up of available N under these conditions. These results imply that multiple environmental changes may combine non-additively to affect below-ground microorganisms and soil C and N pools, which may have important consequences for ecosystem services such as productivity, biodiversity, and soil quality in Mediterranean climate regimes of North America.", "keywords": ["Veterinary and Food Sciences", "Soil Science", "Microbial communities", "Shrubland", "veterinary and food sciences", "Carbon and nitrogen cycle", "11. Sustainability", "Global change", "2. Zero hunger", "Agricultural", "Drought", "Agricultural and Veterinary Sciences", "Ecology", "Forestry Sciences", "Agronomy & Agriculture", "04 agricultural and veterinary sciences", "Biological Sciences", "15. Life on land", "Grassland", "Agricultural and Biological Sciences (miscellaneous)", "6. Clean water", "Environmental sciences", "Biological sciences", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Environmental Sciences"]}, "links": [{"href": "https://escholarship.org/content/qt1p4898qc/qt1p4898qc.pdf"}, {"href": "https://doi.org/10.1016/j.apsoil.2016.05.018"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Applied%20Soil%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.apsoil.2016.05.018", "name": "item", "description": "10.1016/j.apsoil.2016.05.018", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.apsoil.2016.05.018"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-11-01T00:00:00Z"}}, {"id": "10.1016/j.envpol.2013.03.060", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:15:59Z", "type": "Journal Article", "created": "2013-05-15", "title": "Nitrogen Deposition Alters Nitrogen Cycling And Reduces Soil Carbon Content In Low-Productivity Semiarid Mediterranean Ecosystems", "description": "Anthropogenic N deposition poses a threat to European Mediterranean ecosystems. We combined data from an extant N deposition gradient (4.3-7.3 kg N ha\u207b\u00b9 yr\u207b\u00b9) from semiarid areas of Spain and a field experiment in central Spain to evaluate N deposition effects on soil fertility, function and cyanobacteria community. Soil organic N did not increase along the extant gradient. Nitrogen fixation decreased along existing and experimental N deposition gradients, a result possibly related to compositional shifts in soil cyanobacteria community. Net ammonification and nitrification (which dominated N-mineralization) were reduced and increased, respectively, by N fertilization, suggesting alterations in the N cycle. Soil organic C content, C:N ratios and the activity of \u03b2-glucosidase decreased along the extant gradient in most locations. Our results suggest that semiarid soils in low-productivity sites are unable to store additional N inputs, and that are also unable to mitigate increasing C emissions when experiencing increased N deposition.", "keywords": ["Air Pollutants", "Carbon Sequestration", "550", "Nitrogen", "Qu\u00edmica", "04 agricultural and veterinary sciences", "Nitrogen Cycle", "15. Life on land", "01 natural sciences", "Carbon", "Soil", "Spain", "13. Climate action", "XXXXXX - Unknown", "0401 agriculture", " forestry", " and fisheries", "Ecosystem", "Soil Microbiology", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.envpol.2013.03.060"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.envpol.2013.03.060", "name": "item", "description": "10.1016/j.envpol.2013.03.060", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.envpol.2013.03.060"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-08-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2010.11.018", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:48Z", "type": "Journal Article", "created": "2010-12-08", "title": "Cattle Grazing Drives Nitrogen And Carbon Cycling In A Temperate Salt Marsh", "description": "Abstract We examined the impact of long-term cattle grazing on soil processes and microbial activity in a temperate salt marsh. Soil conditions, microbial biomass and respiration, mineralization and denitrification rates were measured in upper salt marsh that had been ungrazed or cattle grazed for several decades. Increased microbial biomass and soil respiration were observed in grazed marsh, most likely stimulated by enhanced rates of root turnover and root exudation. We found a significant positive effect of grazing on potential N mineralization rates measured in the laboratory, but this difference did not translate to in situ net mineralization measured monthly from May to September. Rates of denitrification were lowest in the grazed marsh and appeared to be limited by nitrate availability, possibly due to more anoxic conditions and lower rates of nitrification. The major effect of grazing on N cycling therefore appeared to be in limiting losses of N through denitrification, which may lead to enhanced nutrient availability to saltmarsh plants, but a reduced ability of the marsh to act as a buffer for land-derived nutrients to adjacent coastal areas. Additionally, we investigated if grazing influences the rates of turnover of labile and refractory C in saltmarsh soils by adding 14 C-labelled leaf litter or root exudates to soil samples and monitoring the evolution of 14 CO 2 . Grazing had little effect on the rates of mineralization of 14 C used as a respiratory substrate, but a larger proportion of 14 C was partitioned into microbial biomass and immobilized in long- and medium-term storage pools in the grazed treatment. Grazing slowed down the turnover of the microbial biomass, which resulted in longer turnover times for both leaf litter and root exudates. Grazing may therefore affect the longevity of C in the soil and alter C storage and utilization pathways in the microbial community.", "keywords": ["2. Zero hunger", "0106 biological sciences", "herbivory", "carbon cycling", "04 agricultural and veterinary sciences", "15. Life on land", "01 natural sciences", "6. Clean water", "salinity", "saltmarsh vegetation", "soil compaction", "13. Climate action", "nitrogen cycle", "0401 agriculture", " forestry", " and fisheries", "nitrogen mineralization"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2010.11.018"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2010.11.018", "name": "item", "description": "10.1016/j.soilbio.2010.11.018", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2010.11.018"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-03-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2015.11.007", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:16:53Z", "type": "Journal Article", "created": "2015-11-25", "title": "Aboveground Litter Quality Is A Better Predictor Than Belowground Microbial Communities When Estimating Carbon Mineralization Along A Land-Use Gradient", "description": "Because of the vegetation cover and anthropogenic disturbances, land-use management strongly influences soil heterotrophic decomposers. Yet, little is known about whether contrasting microbial communities originating from different ecosystems are functionally similar, and only a few studies have disentangled the direct and indirect effects of resource quality on both microbial communities and carbon mineralization rates. To assess the relative importance of aboveground litter quality and belowground microbial communities on litter decomposition, we conducted a reciprocal transplant experiment under controlled conditions using four litters (Triticum aestivum, Fagus sylvatica, Festuca arundinacea and Robinia pseudoacacia) and four soils (culture, plantation, grassland and forest) originating from a land-use gradient. We followed the kinetics of carbon mineralization over 21 dates spanning a 202-day period to assess the variability of responses generated by the plant\u2013soil interactions. Furthermore, at four time points (at 0, 27, 97 and 202 days), the mass loss rates for the main sugars within the cell wall, the microbial biomass (fumigation-extraction), the microbial community structure via phospholipid fatty acid (PLFA), and the activities of four carbon-related hydrolytic enzymes were investigated to assess the functional significance of microbial communities. Our results demonstrated that the importance of soil types and heterotrophic decomposers on carbon mineralization rates was minor (1.2% of the variance explained) compared with the predominant role of litter quality. The structure of the microbial communities responded strongly to both long-term land-use changes and short-term litter additions; specifically, (i) higher proportions of fungi were observed in natural ecosystems compared with agro-systems, and (ii) an opportunistic subset of the bacterial community was stimulated after litter additions. Even if the land-use management and litter quality can shape the microbial community structure in a foreseeable way, we found an important degree of plasticity in the responses of contrasting decomposer communities. In particular, the enzymatic efficiency (defined as the amount of enzyme produced by unit of carbon mineralized) differed among litters but not among soil types, suggesting that the threshold between carbon allocation to growth and acquisition depended more on the \u2018resource-use strategies\u2019 of the soil microorganisms than on the community structure. The recalcitrant litters stimulated \u2018efficient\u2019 communities characterized by low enzymatic activities, microbial biomass and respiration rates at the opposite of labile litters that stimulated \u2018wasteful\u2019 communities characterized by higher activities and metabolic quotient (defined as the amount of carbon respired by unit of biomass). In addition to the direct effects of litter quality, the path analysis reinforced our conclusion that the functional traits of microorganisms via their enzymatic activities are more relevant than their identity for predicting carbon mineralization. Thus, although multiple and coordinated responses of soil microbes can improve our understanding of carbon fluxes, shifts in the plant community composition caused by land-use conversion will have a stronger impact on predictions of carbon mineralization than short-term changes in the microbial community composition.", "keywords": ["2. Zero hunger", "Decomposition", "550", "Functional dissimilarity", "Microbial community structure", "Carbon cycle", "04 agricultural and veterinary sciences", "15. Life on land", "Enzymes", "Litter traits", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Plant\u2013soil interactions", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology"]}, "links": [{"href": "https://doi.org/10.1016/j.soilbio.2015.11.007"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Soil%20Biology%20and%20Biochemistry", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.soilbio.2015.11.007", "name": "item", "description": "10.1016/j.soilbio.2015.11.007", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2015.11.007"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-03-01T00:00:00Z"}}, {"id": "10.1111/gcb.14399", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-23T16:18:30Z", "type": "Journal Article", "created": "2018-07-14", "title": "Pathways regulating decreased soil respiration with warming in a biocrust\u2010dominated dryland", "description": "AbstractA positive soil carbon (C)\uffe2\uff80\uff90climate feedback is embedded into the climatic models of the IPCC. However, recent global syntheses indicate that the temperature sensitivity of soil respiration (RS) in drylands, the largest biome on Earth, is actually lower in warmed than in control plots. Consequently, soil C losses with future warming are expected to be low compared with other biomes. Nevertheless, the empirical basis for these global extrapolations is still poor in drylands, due to the low number of field experiments testing the pathways behind the long\uffe2\uff80\uff90term responses of soil respiration (RS) to warming. Importantly, global drylands are covered with biocrusts (communities formed by bryophytes, lichens, cyanobacteria, fungi, and bacteria), and thus,RSresponses to warming may be driven by both autotrophic and heterotrophic pathways. Here, we evaluated the effects of 8\uffe2\uff80\uff90year experimental warming onRS, and the different pathways involved, in a biocrust\uffe2\uff80\uff90dominated dryland in southern Spain. We also assessed the overall impacts on soil organic C (SOC) accumulation over time. Across the years and biocrust cover levels, warming reducedRSby 0.30\uffc2\uffa0\uffce\uffbcmol\uffc2\uffa0CO2\uffc2\uffa0m\uffe2\uff88\uff922\uffc2\uffa0s\uffe2\uff88\uff921(95% CI\uffc2\uffa0=\uffc2\uffa0\uffe2\uff88\uff920.24 to 0.84), although the negative warming effects were only significant after 3\uffc2\uffa0years of elevated temperatures in areas with low initial biocrust cover. We found support for different pathways regulating the warming\uffe2\uff80\uff90induced reduction inRSat areas with low (microbial thermal acclimation via reduced soil mass\uffe2\uff80\uff90specific respiration and \uffce\uffb2\uffe2\uff80\uff90glucosidase enzymatic activity) vs. high (microbial thermal acclimation jointly with a reduction in autotrophic respiration from decreased lichen cover) initial biocrust cover. Our 8\uffe2\uff80\uff90year experimental study shows a reduction in soil respiration with warming and highlights that biocrusts should be explicitly included in modeling efforts aimed to quantify the soil C\uffe2\uff80\uff93climate feedback in drylands.Arctic and alpine tundra ecosystems are large reservoirs of organic carbon1,2. Climate warming may stimulate ecosystem respiration and release carbon into the atmosphere3,4. The magnitude and persistency of this stimulation and the environmental mechanisms that drive its variation remain uncertain5\uffe2\uff80\uff937. This hampers the accuracy of global land carbon\uffe2\uff80\uff93climate feedback projections7,8. Here we synthesize 136 datasets from 56 open-top chamber in situ warming experiments located at 28 arctic and alpine tundra sites which have been running for less than 1\uffe2\uff80\uff89year up to 25\uffe2\uff80\uff89years. We show that a mean rise of 1.4\uffe2\uff80\uff89\uffc2\uffb0C [confidence interval (CI) 0.9\uffe2\uff80\uff932.0\uffe2\uff80\uff89\uffc2\uffb0C] in air and 0.4\uffe2\uff80\uff89\uffc2\uffb0C [CI 0.2\uffe2\uff80\uff930.7\uffe2\uff80\uff89\uffc2\uffb0C] in soil temperature results in an increase in growing season ecosystem respiration by 30% [CI 22\uffe2\uff80\uff9338%] (n\uffe2\uff80\uff89=\uffe2\uff80\uff89136). Our findings indicate that the stimulation of ecosystem respiration was due to increases in both plant-related and microbial respiration (n\uffe2\uff80\uff89=\uffe2\uff80\uff899) and continued for at least 25\uffe2\uff80\uff89years (n\uffe2\uff80\uff89=\uffe2\uff80\uff89136). The magnitude of the warming effects on respiration was driven by variation in warming-induced changes in local soil conditions, that is, changes in total nitrogen concentration and pH and by context-dependent spatial variation in these conditions, in particular total nitrogen concentration and the carbon:nitrogen ratio. Tundra sites with stronger nitrogen limitations and sites in which warming had stimulated plant and microbial nutrient turnover seemed particularly sensitive in their respiration response to warming. The results highlight the importance of local soil conditions and warming-induced changes therein for future climatic impacts on respiration.