{"type": "FeatureCollection", "features": [{"id": "10.1007/s00442-005-0012-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:14:30Z", "type": "Journal Article", "created": "2005-04-05", "title": "Inter-Annual Variability Of Ndvi In Response To Long-Term Warming And Fertilization In Wet Sedge And Tussock Tundra", "description": "This study explores the relationship between the normalized difference vegetation index (NDVI) and aboveground plant biomass for tussock tundra vegetation and compares it to a previously established NDVI-biomass relationship for wet sedge tundra vegetation. In addition, we explore inter-annual variation in NDVI in both these contrasting vegetation communities. All measurements were taken across long-term experimental treatments in wet sedge and tussock tundra communities at the Toolik Lake Long Term Ecological Research (LTER) site, in northern Alaska. Over 15 years (for wet sedge tundra) and 14 years (for tussock tundra), N and P were applied in factorial experiments (N, P and N+P), air temperature was increased using greenhouses with and without N+P fertilizer, and light intensity was reduced by 50% using shade cloth. during the peak growing seasons of 2001, 2002, and 2003, NDVI measurements were made in both the wet sedge and tussock tundra experimental treatment plots, creating a 3-year time series of inter-annual variation in NDVI. We found that: (1) across all tussock experimental tundra treatments, NDVI is correlated with aboveground plant biomass (r2 = 0.59); (2) NDVI-biomass relationships for tussock and wet sedge tundra communities are community specific, and; (3) NDVI values for tussock tundra communities are typically, but not always, greater than for wet sedge tundra communities across all experimental treatments. We suggest that differences between the response of wet sedge and tussock tundra communities in the same experimental treatments result from the contrasting degree of heterogeneity in species and functional types that characterize each of these Arctic tundra vegetation communities.", "keywords": ["0106 biological sciences", "Analysis of Variance", "Nitrogen", "Temperature", "Phosphorus", "04 agricultural and veterinary sciences", "Environment", "15. Life on land", "01 natural sciences", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Longitudinal Studies", "Alaska", "Ecosystem", "Plant Physiological Phenomena"]}, "links": [{"href": "https://doi.org/10.1007/s00442-005-0012-9"}, {"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/s00442-005-0012-9", "name": "item", "description": "10.1007/s00442-005-0012-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-005-0012-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-03-19T00:00:00Z"}}, {"id": "10.1007/s00442-013-2733-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:14:31Z", "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/s00442-017-3965-6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:14:31Z", "type": "Journal Article", "created": "2017-10-05", "title": "Nutrient Limitation Of Soil Microbial Activity During The Earliest Stages Of Ecosystem Development", "description": "A dominant paradigm in ecology is that plants are limited by nitrogen (N) during primary succession. Whether generalizable patterns of nutrient limitation are also applicable to metabolically and phylogenetically diverse soil microbial communities, however, is not well understood. We investigated if measures of N and phosphorus (P) pools inform our understanding of the nutrient(s) most limiting to soil microbial community activities during primary succession. We evaluated soil biogeochemical properties and microbial processes using two complementary methodological approaches-a nutrient addition microcosm experiment and extracellular enzyme assays-to assess microbial nutrient limitation across three actively retreating glacial chronosequences. Microbial respiratory responses in the microcosm experiment provided evidence for N, P and N/P co-limitation at Easton Glacier, Washington, USA, Puca Glacier, Peru, and Mendenhall Glacier, Alaska, USA, respectively, and patterns of nutrient limitation generally reflected site-level differences in soil nutrient availability. The activities of three key extracellular enzymes known to vary with soil N and P availability developed in broadly similar ways among sites, increasing with succession and consistently correlating with changes in soil total N pools. Together, our findings demonstrate that during the earliest stages of soil development, microbial nutrient limitation and activity generally reflect soil nutrient supply, a result that is broadly consistent with biogeochemical theory.", "keywords": ["Washington", "2. Zero hunger", "Nitrogen", "Phosphorus", "04 agricultural and veterinary sciences", "15. Life on land", "Soil", "Food", "Peru", "0401 agriculture", " forestry", " and fisheries", "Ice Cover", "Alaska", "Ecosystem", "Phylogeny", "Soil Microbiology"]}, "links": [{"href": "https://doi.org/10.1007/s00442-017-3965-6"}, {"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/s00442-017-3965-6", "name": "item", "description": "10.1007/s00442-017-3965-6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-017-3965-6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-10-05T00:00:00Z"}}, {"id": "10.1007/s00442-015-3543-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:14:31Z", "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/s100210000025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:14:36Z", "type": "Journal Article", "created": "2002-07-25", "title": "Controls On Soil Carbon Dioxide And Methane Fluxes In A Variety Of Taiga Forest Stands In Interior Alaska", "description": "CO2 and CH4 fluxes were monitored over 4 years in a range of taiga forests along the Tanana River in interior Alaska. Floodplain alder and white spruce sites and upland birch/aspen and white spruce sites were examined. Each site had control, fertilized, and sawdust amended plots; flux measurements began during the second treatment year. CO2 emissions decreased with successional age across the sites (alder, birch/aspen, and white spruce, in order of succession) regardless of landscape position. Although CO2 fluxes showed an exponential relationship with soil temperature, the response of CO2 production to moisture fit an asymptotic model. Of the manipulations, only N fertilization had an effect on CO2 flux, decreasing flux in the floodplain sites but increasing it in the birch/aspen site. Landscape position was the best predictor of CH4 flux. The two upland sites consumed CH4 at similar rates (approximately 0.5 mg C m\u22122 d\u22121), whereas the floodplain sites had lower consumption rates (0\u20130.3 mg C m\u22122 d\u22121). N fertilization and sawdust both inhibited CH4 consumption in the upland birch/aspen and floodplain spruce sites but not in the upland spruce site. The biological processes driving CO2 fluxes were sensitive to temperature, moisture, and vegetation, whereas CH4 fluxes were sensitive primarily to landscape position and biogeochemical disturbances. Hence, climate change effects on C-gas flux in taiga forest soils will depend on the relationship between soil temperature and moisture and the concomitant changes in soil nutrient pools and cycles.", "keywords": ["landscape-ecology", "Betulaceae-: Dicotyledones-", "flux-", "soil-nutrient-pools", "Coniferopsida-: Gymnospermae-", "Vascular-Plants", "forests-", "Environmental-Sciences)", "carbon-dioxide", "nitrogen-fertilizers", "01 natural sciences", "carbon-dioxide: emissions-", "nitrogen-: fertilization-", "vegetation-", "birch- (Betulaceae-)", "124-38-9: CARBON DIOXIDE", "Spermatophytes-", "Spermatophyta-", "74-82-8: METHANE", "Plantae-", "white-spruce (Coniferopsida-)", "successional-age", "boreal-forests", "environmental-temperature", "0105 earth and related environmental sciences", "taiga-forest-stands", "Angiosperms-", "Gymnosperms-", "Angiospermae-", "Plants-", "sawdust-", "methane-", "15. Life on land", "North-America", "Nearctic-region)", "floodplains-", "mathematical-models", "13. Climate action", "alder- (Betulaceae-)", "upland-sites", "Alaska- (USA-", "climate-change", "Terrestrial-Ecology (Ecology-", "7727-37-9: NITROGEN", "Dicots-", "methane-: consumption-", "moisture-", "climatic-change", "temperature-"]}, "links": [{"href": "https://doi.org/10.1007/s100210000025"}, {"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/s100210000025", "name": "item", "description": "10.1007/s100210000025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s100210000025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2000-05-10T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2010.03.026", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:16:40Z", "type": "Journal Article", "created": "2010-04-14", "title": "Nitrogen Alters Carbon Dynamics During Early Succession In Boreal Forest", "description": "Boreal forests are an important source of wood products, and fertilizers could be used to improve forest yields, especially in nutrient poor regions of the boreal zone. With climate change, fire frequencies may increase, resulting in a larger fraction of the boreal landscape present in early-successional stages. Since most fertilization studies have focused on mature boreal forests, the response of burned boreal ecosystems to increased nutrient availability is unclear. Therefore, we used a nitrogen (N) fertilization experiment to test how C cycling in a recently-burned boreal ecosystem would respond to increased N availability. We hypothesized that fertilization would increase rates of decomposition, soil respiration, and the activity of extracellular enzymes involved in C cycling, thereby reducing soil C stocks. In line with our hypothesis, litter mass loss increased significantly and activities of cellulose- and chitin-degrading enzymes increased by 45\u201361% with N addition. We also observed a significant decline in C concentrations in the organic soil horizon from 19.5 \u00b1 0.7% to 13.5 \u00b1 0.6%, and there was a trend toward lower total soil C stocks in the fertilized plots. Contrary to our hypothesis, mean soil respiration over three growing seasons declined by 31% from 78.3 \u00b1 6.5 mg CO2\u2013C m\u22122 h\u22121 to 54.4 \u00b1 4.1 mg CO2\u2013C m\u22122 h\u22121. These changes occurred despite a 2.5-fold increase in aboveground net primary productivity with N, and were accompanied by significant shifts in the structure of the fungal community, which was dominated by Ascomycota. Our results show that the C cycle in early-successional boreal ecosystems is highly responsive to N addition. Fertilization results in an initial loss of soil C followed by depletion of soil C substrates and development of a distinct and active fungal community. Total microbial biomass declines and respiration rates do not keep pace with plant inputs. These patterns suggest that N fertilization could transiently reduce but then increase ecosystem C storage in boreal regions experiencing more frequent fires.", "keywords": ["0106 biological sciences", "Decomposition", "Extracellular enzyme", "Agricultural and Veterinary Sciences", "Fungi", "Agronomy & Agriculture", "Soil respiration", "04 agricultural and veterinary sciences", "Biological Sciences", "15. Life on land", "Fire", "Soil carbon", "01 natural sciences", "Nitrogen fertilization", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Boreal forest", "Succession", "Alaska", "Environmental Sciences"]}, "links": [{"href": "https://escholarship.org/content/qt4z375574/qt4z375574.pdf"}, {"href": "https://doi.org/10.1016/j.soilbio.2010.03.026"}, {"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.2010.03.026", "name": "item", "description": "10.1016/j.soilbio.2010.03.026", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2010.03.026"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-07-01T00:00:00Z"}}, {"id": "10.1016/j.soilbio.2010.07.011", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:16:40Z", "type": "Journal Article", "created": "2010-07-28", "title": "Resistance Of Microbial And Soil Properties To Warming Treatment Seven Years After Boreal Fire", "description": "Boreal forests store a large fraction of global terrestrial carbon and are susceptible to environmental change, particularly rising temperatures and increased fire frequency. These changes have the potential to drive positive feedbacks between climate warming and the boreal carbon cycle. Because few studies have examined the warming response of boreal ecosystems recovering from fire, we established a greenhouse warming experiment near Delta Junction, Alaska, seven years after a 1999 wildfire. We hypothesized that experimental warming would increase soil CO2 efflux, stimulate nutrient mineralization, and alter the composition and function of soil fungal communities. Although our treatment resulted in 1.20 \u00b0C soil warming, we found little support for our hypothesis. Only the activities of cellulose- and chitin-degrading enzymes increased significantly by 15% and 35%, respectively, and there were no changes in soil fungal communities. Warming resulted in drier soils, but the corresponding change in soil water potential was probably not sufficient to limit microbial activity. Rather, the warming response of this soil may be constrained by depletion of labile carbon substrates resulting from combustion and elevated soil temperatures in the years after the 1999 fire. We conclude that positive feedbacks between warming and the microbial release of soil carbon are weak in boreal ecosystems lacking permafrost. Since permafrost-free soils underlie 45\u201360% of the boreal zone, our results should be useful for modeling the warming response during recovery from fire in a large fraction of the boreal forest.", "keywords": ["0301 basic medicine", "Decomposition", "0303 health sciences", "Extracellular enzyme", "Agricultural and Veterinary Sciences", "Fungi", "Agronomy & Agriculture", "Soil respiration", "Biological Sciences", "15. Life on land", "Fire", "Soil carbon", "Climate Action", "03 medical and health sciences", "13. Climate action", "Boreal forest", "Warming", "Succession", "Alaska", "Environmental Sciences"]}, "links": [{"href": "https://escholarship.org/content/qt2zk6k6ms/qt2zk6k6ms.pdf"}, {"href": "https://doi.org/10.1016/j.soilbio.2010.07.011"}, {"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.2010.07.011", "name": "item", "description": "10.1016/j.soilbio.2010.07.011", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.soilbio.2010.07.011"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2010-10-01T00:00:00Z"}}, {"id": "10.1038/nclimate2446", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:17:22Z", "type": "Journal Article", "created": "2014-11-17", "title": "Permafrost Collapse After Shrub Removal Shifts Tundra Ecosystem To A Methane Source", "description": "Arctic tundra ecosystems are warming almost twice as fast as the global average. Permafrost thaw and the resulting release of greenhouse gases from decomposing soil organic carbon have the potential to accelerate climate warming. In recent decades, Arctic tundra ecosystems have changed rapidly, including expansion of woody vegetation, in response to changing climate conditions. How such vegetation changes contribute to stabilization or destabilization of the permafrost is unknown. Here we present six years of field observations in a shrub removal experiment at a Siberian tundra site. Removing the shrub part of the vegetation initiated thawing of ice-rich permafrost, resulting in collapse of the originally elevated shrub patches into waterlogged depressions within five years. This thaw pond development shifted the plots from a methane sink into a methane source. The results of our field experiment demonstrate the importance of the vegetation cover for protection of the massive carbon reservoirs stored in the permafrost and illustrate the strong vulnerability of these tundra ecosystems to perturbations. If permafrost thawing can more frequently trigger such local permafrost collapse, methane-emitting wet depressions could become more abundant in the lowland tundra landscape, at the cost of permafrost-stabilizing low shrub vegetation.", "keywords": ["alaska", "expansion", "13. Climate action", "climate-change", "ice", "SDG 13 - Climate Action", "arctic tundra", "thaw", "15. Life on land", "01 natural sciences", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1038/nclimate2446"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Climate%20Change", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/nclimate2446", "name": "item", "description": "10.1038/nclimate2446", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/nclimate2446"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2014-11-24T00:00:00Z"}}, {"id": "10.1038/ncomms13653", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:17:22Z", "type": "Journal Article", "created": "2016-11-29", "title": "Massive remobilization of permafrost carbon during post-glacial warming", "description": "Abstract<p>Recent hypotheses, based on atmospheric records and models, suggest that permafrost carbon (PF-C) accumulated during the last glaciation may have been an important source for the atmospheric CO2 rise during post-glacial warming. However, direct physical indications for such PF-C release have so far been absent. Here we use the Laptev Sea (Arctic Ocean) as an archive to investigate PF-C destabilization during the last glacial\uffe2\uff80\uff93interglacial period. Our results show evidence for massive supply of PF-C from Siberian soils as a result of severe active layer deepening in response to the warming. Thawing of PF-C must also have brought about an enhanced organic matter respiration and, thus, these findings suggest that PF-C may indeed have been an important source of CO2 across the extensive permafrost domain. The results challenge current paradigms on the post-glacial CO2 rise and, at the same time, serve as a harbinger for possible consequences of the present-day warming of PF-C soils.</p", "keywords": ["550", "Science", "Q", "Permafrost", "Carbon cycle (Biogeochemistry)", "Climatic changes", "Biogeochemistry", "15. Life on land", "01 natural sciences", "Article", "13. Climate action", "SDG 13 - Climate Action", "SDG 14 - Life Below Water", "LAPTEV SEA SHELF; PARTICULATE ORGANIC-MATTER; LAST GLACIAL TERMINATION; ADJACENT NEARSHORE ZONE; GREENLAND STADIAL 1; LENA RIVER DELTA; INTERIOR ALASKA; YOUNGER DRYAS; ARCTIC-OCEAN; NE SIBERIA", "Cryosphere", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://www.nature.com/articles/ncomms13653.pdf"}, {"href": "https://doi.org/10.1038/ncomms13653"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/ncomms13653", "name": "item", "description": "10.1038/ncomms13653", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/ncomms13653"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-11-29T00:00:00Z"}}, {"id": "10.1038/s41559-024-02630-2", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:17:26Z", "type": "Journal Article", "created": "2025-03-24", "title": "Overwintering fires can occur in both peatlands and upland forests with varying ecological impacts", "description": "Climate warming is increasing the prevalence of overwintering 'zombie' fires, which are expected to occur primarily in peatlands, undermining carbon storage through deep burning of organic soils. We visited overwintering fires in Northwest Territories, Canada, and Interior Alaska, United States, and present field measurements of where overwintering fires are burning in the landscape and their impact on combustion severity and forest regeneration. Combustion severity hotspots did not generate overwintering, but peat and woody biomass smouldering both supported overwintering, leading to wintertime smouldering in both treed peatlands and upland forests. These findings create challenges for fire managers and uncertainty about carbon emissions, but forest regeneration was not compromised.", "keywords": ["Northwest Territories", "Soil", "Climate Change", "Seasons", "Forests", "Alaska", "Fires", "Wildfires"], "contacts": [{"organization": "Jennifer L. Baltzer, Xanthe J. Walker, Sander Veraverbeke, Thomas D. Hessilt, Raquel Alfaro-Sanchez, Max J. van Gerrevink, Michelle C. Mack, Emily L. Ogden, Richard Olsen, Rebecca C. Scholten, Merritt R. Turetsky,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1038/s41559-024-02630-2"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Ecology%20%26amp%3B%20Evolution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1038/s41559-024-02630-2", "name": "item", "description": "10.1038/s41559-024-02630-2", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1038/s41559-024-02630-2"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-03-24T00:00:00Z"}}, {"id": "10.1046/j.1365-2745.1998.00278.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:17:35Z", "type": "Journal Article", "created": "2003-05-21", "title": "An Experimental Test Of Limits To Tree Establishment In Arctic Tundra", "description": "<p>1 Five treeline species had low seed germination rates and low survivorship and growth of seedlings when transplanted into Alaskan tundra. Seed germination of all species increased with experimental warming, suggesting that the present treeline may in part result from unsuccessful recruitment under cold conditions.</p><p> 2 Growth, biomass and survivorship of seedlings of treeline species transplanted into tundra were largely unaffected by experimental warming. However, transplanted seedlings of three species (Betula papyrifera, Picea glauca and Populus tremuloides) grew more when below\uffe2\uff80\uff90ground competition with the extant community was reduced. All three measures of transplant performance were greater in shrub tundra than in the less productive tussock or heath tundra. Establishment of trees in tundra may thus be prevented by low resource availability and competition.</p><p> 3 Two species (Alnus crispa and Populus balsamifera) had low seed germination and survivorship of germinated seeds; transplants of these species did not respond to the manipulations and lost biomass following transplanting into tundra. Isolated populations of these two species north of the present treeline in arctic Alaska probably became established during mid\uffe2\uff80\uff90Holocene warming rather than in recent times.</p><p> 4 Of all the species studied here, Picea glauca was the most likely to invade intact upland tundra. Its seeds had the highest germination rates and it was the only species whose seedlings survived subsequently. Furthermore, transplanted seedlings of Picea glauca had relatively high survivorship and positive growth in tundra, especially in treatments that increased air temperature or nutrient availability, two factors likely to increase with climate warming.</p>", "keywords": ["0106 biological sciences", "nutrient-availability", "air-temperature", "tundra", "-Alaska", "Betulaceae-: Dicotyledones-", "Arctic-tundra", "Coniferopsida-: Gymnospermae-", "natural-regeneration", "Environmental-Sciences)", "growth-", "01 natural sciences", "seedlings-", "Picea-glauca", "Betula-papyrifera", "tundra-", "soil-fertility", "Salicaceae-: Dicotyledones-", "Spermatophyta-", "treelines-", "Plantae-", "USA", "tree-establishment", "resource-availability", "Climatology- (Environmental-Sciences)", "Populus-balsamifera (Salicaceae-): seedling-", "Angiosperms-", "transplanting-", "Angiospermae-", "15. Life on land", "Plant-ecology:-communities", "Populus-balsamifera", "Betula-papyrifera (Betulaceae-): seedling-", "Populus-tremuloides", "climate-", "interspecific-competition", "germination", "Populus-tremuloides (Salicaceae-): seedling-", "Terrestrial-Ecology (Ecology-", "Picea-glauca (Coniferopsida-): seedling-", "Dicots-", "seed-germination", "Alnus-crispa", "plant-competition", "Alnus-crispa (Betulaceae-): seedling-", "survival-", "establishment-"]}, "links": [{"href": "https://doi.org/10.1046/j.1365-2745.1998.00278.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1046/j.1365-2745.1998.00278.x", "name": "item", "description": "10.1046/j.1365-2745.1998.00278.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1046/j.1365-2745.1998.00278.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "1998-06-01T00:00:00Z"}}, {"id": "10.1111/gcb.14325", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:18:21Z", "type": "Journal Article", "created": "2018-05-26", "title": "Biotic responses buffer warming-induced soil organic carbon loss in Arctic tundra", "description": "Abstract<p>Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C) source due to the enhanced decomposition of thawed deep soil C. However, warming\uffe2\uff80\uff90induced biotic changes may influence biologically related parameters and the consequent projections inESMs. How model parameters associated with biotic responses will change under warming and to what extent these changes affect projected C budgets have not been carefully examined. In this study, we synthesized six data sets over 5\uffc2\uffa0years from a soil warming experiment at the Eight Mile Lake, Alaska, into the TerrestrialECOsystem (TECO) model with a probabilistic inversion approach. TheTECOmodel used multiple soil layers to track dynamics of thawed soil under different treatments. Our results show that warming increased light use efficiency of vegetation photosynthesis but decreased baseline (i.e., environment\uffe2\uff80\uff90corrected) turnover rates ofSOCin both the fast and slow pools in comparison with those under control. Moreover, the parameter changes generally amplified over time, suggesting processes of gradual physiological acclimation and functional gene shifts of both plants and microbes. TheTECOmodel predicted that field warming from 2009 to 2013 resulted in cumulative C losses of 224 or 87\uffc2\uffa0g/m2, respectively, without or with changes in those parameters. Thus, warming\uffe2\uff80\uff90induced parameter changes reduced predicted soil C loss by 61%. Our study suggests that it is critical to incorporate biotic changes inESMs to improve the model performance in predicting C dynamics in permafrost regions.</p>", "keywords": ["550", "Climate Change", "Permafrost", "acclimation", "carbon modeling", "01 natural sciences", "climate warming", "Soil", "Theoretical", "Models", "soil carbon", "Photosynthesis", "biotic responses", "data assimilation", "Tundra", "Soil Microbiology", "0105 earth and related environmental sciences", "Ecology", "500", "Biological Sciences", "Models", " Theoretical", "Plants", "15. Life on land", "Carbon", "Climate Action", "Environmental sciences", "Biological sciences", "Earth sciences", "13. Climate action", "Environmental Sciences", "Alaska", "permafrost"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14325"}, {"href": "https://doi.org/10.1111/gcb.14325"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcb.14325", "name": "item", "description": "10.1111/gcb.14325", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcb.14325"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-06-12T00:00:00Z"}}, {"id": "10.1111/j.1365-2486.2008.01549.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:18:31Z", "type": "Journal Article", "created": "2008-02-11", "title": "Microbial Activity And Soil Respiration Under Nitrogen Addition In Alaskan Boreal Forest", "description": "Abstract<p>Climate warming could increase rates of soil organic matter turnover and nutrient mineralization, particularly in northern high\uffe2\uff80\uff90latitude ecosystems. However, the effects of increasing nutrient availability on microbial processes in these ecosystems are poorly understood. To determine how soil microbes respond to nutrient enrichment, we measured microbial biomass, extracellular enzyme activities, soil respiration, and the community composition of active fungi in nitrogen (N) fertilized soils of a boreal forest in central Alaska. We predicted that N addition would suppress fungal activity relative to bacteria, but stimulate carbon (C)\uffe2\uff80\uff90degrading enzyme activities and soil respiration. Instead, we found no evidence for a suppression of fungal activity, although fungal sporocarp production declined significantly, and the relative abundance of two fungal taxa changed dramatically with N fertilization. Microbial biomass as measured by chloroform fumigation did not respond to fertilization, nor did the ratio of fungi\uffe2\uff80\uff83:\uffe2\uff80\uff83bacteria as measured by quantitative polymerase chain reaction. However, microbial biomass C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratios narrowed significantly from 16.0 \uffc2\uffb1 1.4 to 5.2 \uffc2\uffb1 0.3 with fertilization. N fertilization significantly increased the activity of a cellulose\uffe2\uff80\uff90degrading enzyme and suppressed the activities of protein\uffe2\uff80\uff90 and chitin\uffe2\uff80\uff90degrading enzymes but had no effect on soil respiration rates or 14C signatures. These results indicate that N fertilization alters microbial community composition and allocation to extracellular enzyme production without affecting soil respiration. Thus, our results do not provide evidence for strong microbial feedbacks to the boreal C cycle under climate warming or N addition. However, organic N cycling may decline due to a reduction in the activity of enzymes that target nitrogenous compounds.</p>", "keywords": ["2. Zero hunger", "nucleotide analog", "Ecology", "microbial biomass", "ectomycorrhizal fungi", "extracellular enzyme", "nitrogen fertilization", "04 agricultural and veterinary sciences", "15. Life on land", "Biological Sciences", "soil respiration", "Environmental sciences", "Biological sciences", "Earth sciences", "13. Climate action", "carbon cycle", "0401 agriculture", " forestry", " and fisheries", "boreal forest", "bacteria", "Alaska", "Environmental Sciences"]}, "links": [{"href": "https://escholarship.org/content/qt5dg6p7gm/qt5dg6p7gm.pdf"}, {"href": "https://doi.org/10.1111/j.1365-2486.2008.01549.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2486.2008.01549.x", "name": "item", "description": "10.1111/j.1365-2486.2008.01549.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2008.01549.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2008-01-20T00:00:00Z"}}, {"id": "10.1111/j.1365-2745.2008.01472.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:18:34Z", "type": "Journal Article", "created": "2009-01-21", "title": "Determinants Of Cryptogam Composition And Diversity In Sphagnum-Dominated Peatlands: The Importance Of Temporal, Spatial And Functional Scales", "description": "Summary<p>  <p>Changing temperature regimes and precipitation patterns in the Subarctic will impact on vegetation composition and diversity including those of bryophyte and lichen communities, which are major drivers of high\uffe2\uff80\uff90latitude carbon and nutrient cycling and hydrology.</p> <p>We investigated the relative importance of such impacts at different temporal, spatial and plant functional scales in subarctic Sphagnum fuscum\uffe2\uff80\uff90dominated peatlands, comprising both an in situ warming experiment and natural climatic and topographic gradients in northern Sweden and Norway. We applied multivariate analyses to investigate the relationships among cryptogam and vascular plant species composition and abiotic (temperature, moisture) and biotic (Sphagnum growth) regimes at various scales.</p> <p>At the short\uffe2\uff80\uff90term temporal scale (4\uffe2\uff80\uff90year warming experiment), increased temperature yielded no clear effect on cryptogam or vascular plant species composition. Spatially, direct effects of temperature were decisive for overall species composition across regions (macro\uffe2\uff80\uff90scale) rather than within one region (meso\uffe2\uff80\uff90scale). Moisture and Sphagnum growth were drivers of species composition at all spatial scales, and Sphagnum growth itself depended on its position on the microtopographic gradient and on temperature.</p> <p>Grouping of bryophytes and lichens at increasing scales of functional aggregation from species, growth form to the major higher taxon level (Sphagnum, other mosses, liverworts, lichens) revealed mostly increasing correlation with climate regimes and Sphagnum growth. Excluding liverworts from the analysis tended to reduce the correlation.</p> <p>Abundances of lichens, liverworts, non\uffe2\uff80\uff90Sphagnum mosses and (to a lesser degree) vascular plants were negatively related to Sphagnum abundance. Few cryptogam and vascular plant species showed a positive relationship with Sphagnum abundance. Correspondingly, cryptogam species richness and Shannon Index on peatlands strongly declined as Sphagnum abundance increased, while indices for vascular plants showed no significant relationship.</p> <p> Synthesis. Scale, be it spatial or functional, strongly determined which environmental drivers showed the clearest relationships with vegetation composition and diversity. Our findings will help to optimize predictions about long\uffe2\uff80\uff90term effects of climate on peatland vegetation composition, and subsequently its feedbacks to carbon and water cycles, at the regional scale.</p>  </p>", "keywords": ["0106 biological sciences", "simulated environmental-change", "species composition", "western canada", "alaskan arctic tundra", "response surfaces", "15. Life on land", "01 natural sciences", "hylocomium-splendens", "13. Climate action", "physical gradients", "SDG 13 - Climate Action", "nutrient availability", "community structure", "global change"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2745.2008.01472.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Ecology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1365-2745.2008.01472.x", "name": "item", "description": "10.1111/j.1365-2745.2008.01472.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2745.2008.01472.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-02-11T00:00:00Z"}}, {"id": "10.1890/03-5133", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:19:36Z", "type": "Journal Article", "created": "2007-06-06", "title": "Relationships Among Fires, Fungi, And Soil Dynamics In Alaskan Boreal Forests", "description": "Fires are critical pathways of carbon loss from boreal forest soils, whereas microbial communities form equally critical controls over carbon accumulation between fires. We used a chronosequence in Alaska to test Read's hypothesis that arbuscular my- corrhizal fungi should dominate ecosystems with low accumulation of surface litter, and ectomycorrhizal fungi should proliferate where organic horizons are well-developed. This pattern is expected because ectomycorrhizal fungi display a greater capacity to mineralize organic compounds than do arbuscular mycorrhizal fungi. The sites were located in upland forests near Delta Junction, Alaska, and represent stages at 3, 15, 45, and 80 years following fire. Soil organic matter accumulated 2.8-fold over time. Fire did not noticeably reduce the abundance of arbuscular mycorrhizal fungi. In contrast, ectomycorrhizal colonization re- quired up to 15 years to return to pre-fire levels. As a result, dominant mycorrhizal groups shifted from arbuscular to ectomycorrhizal fungi as succession progressed. Bacterial func- tional diversity was greatest in the oldest sites. Altogether, microbes that can mineralize organic compounds (i.e., ectomycorrhizae and bacteria) recovered more slowly than those that cannot (i.e., arbuscular mycorrhizae). Potential net N mineralization and standing pools of ammonium-N were relatively low in the youngest site. In addition, glomalin stocks were positively correlated with arbuscular mycorrhizal hyphal length, peaking early in the chron- osequence. Our results indicate that microbial succession may influence soil carbon and nitrogen dynamics in the first several years following fire, by augmenting carbon storage in glomalin while inhibiting mineralization of organic compounds.", "keywords": ["external hyphae", "soil carbon and nitrogen", "biolog", "04 agricultural and veterinary sciences", "15. Life on land", "chronosequence", "fire and soil microbes", "succession", "Alaskan boreal forest", "mycorrhizal fungi", "organic material", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "mineralization", "microbial community", "glomalin"]}, "links": [{"href": "https://escholarship.org/content/qt3wc775gm/qt3wc775gm.pdf"}, {"href": "https://doi.org/10.1890/03-5133"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecological%20Applications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1890/03-5133", "name": "item", "description": "10.1890/03-5133", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1890/03-5133"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2004-12-01T00:00:00Z"}}, {"id": "10.34894/XK4LSU", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:20:47Z", "type": "Dataset", "title": "Porewater \u03b413CDOC Indicates Variable Extent Of Degradation In Different Talik Layers Of Coastal Alaskan Thermokarst Lakes", "description": "The data set includes the results of geochemical and sediment analyses on 7 sediment cores (63.2 cm - 86.5 cm) from two northern Alaskan thermokarst lakes (Emaiksoun and Unnamed Lake). The analysis include lake depth measurements, linescan imaging, XRF scans, grainsize distribution, loss on ignition, porewater content, magnetic susceptibility, dissolved organic carbon concentration, sediment density, stable carbon isotope measurements dissolved organic carbon and soil organic carbon and radiocarbon ages.", "keywords": ["Earth and Environmental Science", "13. Climate action", "Earth and Environmental Sciences", "Thermokarst Lake", "Dissolved Organic Carbon", "Permafrost", "15. Life on land", "Environmental Research", "Natural Sciences", "Geosciences", "Alaska"], "contacts": [{"organization": "Meisel, Ove", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.34894/XK4LSU"}, {"rel": "self", "type": "application/geo+json", "title": "10.34894/XK4LSU", "name": "item", "description": "10.34894/XK4LSU", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.34894/XK4LSU"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-01-01T00:00:00Z"}}, {"id": "10.5281/zenodo.15077441", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:22:23Z", "type": "Dataset", "created": "2025-04-24", "title": "Permafrost thaw reverses soil carbon age profiles and extends transit time in an Arctic tundra soil", "description": "unspecifiedA vertically-resolved model was developed and optimized against radiocarbon (14C) data from a 25-year snow manipulation experiment to quantify how deeper snow affects soil carbon age, transit time, and redistribution in Arctic permafrost.", "keywords": ["soil organic carbon", "Age", "Carbon dioxide", "transit time", "radiocarbon", "Permafrost", "Arctic ecosystem", "Carbon", "Alaska"], "contacts": [{"organization": "Tangarife Escobar, Andres, Pedron, Shawn Alexander, Czimczik, Claudia I., Metzler, Holger, Gonz\u00e1lez Sosa, Maximiliano, Welker, Jeffrey, Guggenberger, Georg, Sierra, Carlos,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.15077441"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.15077441", "name": "item", "description": "10.5281/zenodo.15077441", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.15077441"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-03-24T00:00:00Z"}}, {"id": "10.5281/zenodo.16965776", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:22:43Z", "type": "Dataset", "created": "2025-04-24", "title": "Permafrost thaw reverses soil carbon age profiles and extends transit time in an Arctic tundra soil", "description": "unspecifiedA vertically-resolved model was developed and optimized against radiocarbon (14C) data from a 25-year snow manipulation experiment to quantify how deeper snow affects soil carbon age, transit time, and redistribution in Arctic permafrost.", "keywords": ["soil organic carbon", "Age", "Carbon dioxide", "transit time", "radiocarbon", "Permafrost", "Arctic ecosystem", "Carbon", "Alaska"], "contacts": [{"organization": "Tangarife Escobar, Andres, Pedron, Shawn Alexander, Czimczik, Claudia I., Metzler, Holger, Gonz\u00e1lez Sosa, Maximiliano, Welker, Jeffrey, Guggenberger, Georg, Sierra, Carlos,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.16965776"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.16965776", "name": "item", "description": "10.5281/zenodo.16965776", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.16965776"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-03-24T00:00:00Z"}}, {"id": "20.500.14243/317553", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:24:51Z", "type": "Journal Article", "created": "2016-11-29", "title": "Massive remobilization of permafrost carbon during post-glacial warming", "description": "Abstract<p>Recent hypotheses, based on atmospheric records and models, suggest that permafrost carbon (PF-C) accumulated during the last glaciation may have been an important source for the atmospheric CO2 rise during post-glacial warming. However, direct physical indications for such PF-C release have so far been absent. Here we use the Laptev Sea (Arctic Ocean) as an archive to investigate PF-C destabilization during the last glacial\uffe2\uff80\uff93interglacial period. Our results show evidence for massive supply of PF-C from Siberian soils as a result of severe active layer deepening in response to the warming. Thawing of PF-C must also have brought about an enhanced organic matter respiration and, thus, these findings suggest that PF-C may indeed have been an important source of CO2 across the extensive permafrost domain. The results challenge current paradigms on the post-glacial CO2 rise and, at the same time, serve as a harbinger for possible consequences of the present-day warming of PF-C soils.</p", "keywords": ["550", "Science", "Q", "Permafrost", "Carbon cycle (Biogeochemistry)", "Climatic changes", "Biogeochemistry", "15. Life on land", "01 natural sciences", "Article", "13. Climate action", "SDG 13 - Climate Action", "SDG 14 - Life Below Water", "LAPTEV SEA SHELF; PARTICULATE ORGANIC-MATTER; LAST GLACIAL TERMINATION; ADJACENT NEARSHORE ZONE; GREENLAND STADIAL 1; LENA RIVER DELTA; INTERIOR ALASKA; YOUNGER DRYAS; ARCTIC-OCEAN; NE SIBERIA", "Cryosphere", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://www.nature.com/articles/ncomms13653.pdf"}, {"href": "https://doi.org/20.500.14243/317553"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Nature%20Communications", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "20.500.14243/317553", "name": "item", "description": "20.500.14243/317553", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/20.500.14243/317553"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-11-29T00:00:00Z"}}, {"id": "2804595293", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:25:12Z", "type": "Journal Article", "created": "2018-05-26", "title": "Biotic responses buffer warming\u2010induced soil organic carbon loss in Arctic tundra", "description": "Abstract<p>Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C) source due to the enhanced decomposition of thawed deep soil C. However, warming\uffe2\uff80\uff90induced biotic changes may influence biologically related parameters and the consequent projections inESMs. How model parameters associated with biotic responses will change under warming and to what extent these changes affect projected C budgets have not been carefully examined. In this study, we synthesized six data sets over 5\uffc2\uffa0years from a soil warming experiment at the Eight Mile Lake, Alaska, into the TerrestrialECOsystem (TECO) model with a probabilistic inversion approach. TheTECOmodel used multiple soil layers to track dynamics of thawed soil under different treatments. Our results show that warming increased light use efficiency of vegetation photosynthesis but decreased baseline (i.e., environment\uffe2\uff80\uff90corrected) turnover rates ofSOCin both the fast and slow pools in comparison with those under control. Moreover, the parameter changes generally amplified over time, suggesting processes of gradual physiological acclimation and functional gene shifts of both plants and microbes. TheTECOmodel predicted that field warming from 2009 to 2013 resulted in cumulative C losses of 224 or 87\uffc2\uffa0g/m2, respectively, without or with changes in those parameters. Thus, warming\uffe2\uff80\uff90induced parameter changes reduced predicted soil C loss by 61%. Our study suggests that it is critical to incorporate biotic changes inESMs to improve the model performance in predicting C dynamics in permafrost regions.</p", "keywords": ["550", "Climate Change", "Permafrost", "acclimation", "carbon modeling", "01 natural sciences", "climate warming", "Soil", "Theoretical", "Models", "soil carbon", "Photosynthesis", "biotic responses", "data assimilation", "Tundra", "Soil Microbiology", "0105 earth and related environmental sciences", "Ecology", "500", "Biological Sciences", "Models", " Theoretical", "Plants", "15. Life on land", "Carbon", "Climate Action", "Environmental sciences", "Biological sciences", "Earth sciences", "13. Climate action", "Environmental Sciences", "Alaska", "permafrost"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14325"}, {"href": "https://doi.org/2804595293"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2804595293", "name": "item", "description": "2804595293", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2804595293"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-06-12T00:00:00Z"}}, {"id": "29802797", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-16T16:25:18Z", "type": "Journal Article", "created": "2018-05-26", "title": "Biotic responses buffer warming\u2010induced soil organic carbon loss in Arctic tundra", "description": "Abstract<p>Climate warming can result in both abiotic (e.g., permafrost thaw) and biotic (e.g., microbial functional genes) changes in Arctic tundra. Recent research has incorporated dynamic permafrost thaw in Earth system models (ESMs) and indicates that Arctic tundra could be a significant future carbon (C) source due to the enhanced decomposition of thawed deep soil C. However, warming\uffe2\uff80\uff90induced biotic changes may influence biologically related parameters and the consequent projections inESMs. How model parameters associated with biotic responses will change under warming and to what extent these changes affect projected C budgets have not been carefully examined. In this study, we synthesized six data sets over 5\uffc2\uffa0years from a soil warming experiment at the Eight Mile Lake, Alaska, into the TerrestrialECOsystem (TECO) model with a probabilistic inversion approach. TheTECOmodel used multiple soil layers to track dynamics of thawed soil under different treatments. Our results show that warming increased light use efficiency of vegetation photosynthesis but decreased baseline (i.e., environment\uffe2\uff80\uff90corrected) turnover rates ofSOCin both the fast and slow pools in comparison with those under control. Moreover, the parameter changes generally amplified over time, suggesting processes of gradual physiological acclimation and functional gene shifts of both plants and microbes. TheTECOmodel predicted that field warming from 2009 to 2013 resulted in cumulative C losses of 224 or 87\uffc2\uffa0g/m2, respectively, without or with changes in those parameters. Thus, warming\uffe2\uff80\uff90induced parameter changes reduced predicted soil C loss by 61%. Our study suggests that it is critical to incorporate biotic changes inESMs to improve the model performance in predicting C dynamics in permafrost regions.</p", "keywords": ["550", "Climate Change", "Permafrost", "acclimation", "carbon modeling", "01 natural sciences", "climate warming", "Soil", "Theoretical", "Models", "soil carbon", "Photosynthesis", "biotic responses", "data assimilation", "Tundra", "Soil Microbiology", "0105 earth and related environmental sciences", "Ecology", "500", "Biological Sciences", "Models", " Theoretical", "Plants", "15. Life on land", "Carbon", "Climate Action", "Environmental sciences", "Biological sciences", "Earth sciences", "13. Climate action", "Environmental Sciences", "Alaska", "permafrost"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/gcb.14325"}, {"href": "https://doi.org/29802797"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Global%20Change%20Biology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "29802797", "name": "item", "description": "29802797", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/29802797"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-06-12T00:00:00Z"}}, {"id": "52141fd6-6d4c-4816-addf-9c29e15d4f4a", "type": "Feature", "geometry": {"type": "Polygon", "coordinates": [[[64.87, 64.86], [64.87, 64.87], [64.87, 64.87], [64.87, 64.86], [64.87, 64.86]]]}, "properties": {"themes": [{"concepts": [{"id": "farming"}], "scheme": "https://standards.iso.org/iso/19139/resources/gmxCodelists.xml#MD_TopicCategoryCode"}, {"concepts": [{"id": "Soil"}, {"id": "topsoil"}, {"id": "subsoil"}, {"id": "soil chemicophysical properties"}, {"id": "redox potential"}, {"id": "soil water content"}, {"id": "soil temperature"}, {"id": "monitoring systems"}, {"id": "permafrost"}, {"id": "soil degradation"}], "scheme": "AGROVOC Multilingual agricultural thesaurus"}, {"concepts": [{"id": "opendata"}, {"id": "Pedogenic iron"}, {"id": "oxidizing soil conditions"}, {"id": "reducing soil conditions"}], "scheme": "Individual"}, {"concepts": [{"id": "Boden"}, {"id": "pedosphere"}, {"id": "soil"}, {"id": "soil degradation"}, {"id": "organic matter"}, {"id": "decomposition"}, {"id": "environmental monitoring"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}, {"concepts": [{"id": "Alaska"}], "scheme": "individual"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The ZALF Datenerfassung and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-07-21", "type": "Dataset", "created": "2025-07-07", "language": "eng", "title": "Soil monitoring dataset Fairbanks Alaska", "description": "This dataset includes a soil monitoring of redox potential, soil moisture, and soil temperature in 2 soil depths (mineral topsoil and subsoil) at 3 research sites in Fairbanks, Interior Alaska. Research sites cover an intact permafrost soil and 2 degraded permafrost soils, one dry-degraded and one wet-degraded site. The monitoring was conducted from September 2021 to September 2024, covering 3 consecutive years. Measuring intervals were set to 15 min. Soil redox potentials were measured against an Ag/AgCl reference electrode in 3 M KCl electrolyte solution. Data in the dataset are raw data without correction to the standard hydrogen electrode.", "formats": [{"name": "CSV"}], "keywords": ["Soil", "topsoil", "subsoil", "soil chemicophysical properties", "redox potential", "soil water content", "soil temperature", "monitoring systems", "permafrost", "soil degradation", "opendata", "Pedogenic iron", "oxidizing soil conditions", "reducing soil conditions", "Boden", "pedosphere", "soil", "soil degradation", "organic matter", "decomposition", "environmental monitoring", "Alaska"], "contacts": [{"name": "Leibniz Centre for Agricultural Landscape Research", "organization": "ZALF", "position": "Research Platform 'Data Analysis & Simulation' - Workgroup Research Data Management", "roles": ["publisher"], "phones": [{"value": "+49 33432 82 300"}], "emails": [{"value": "dataservice@zalf.de"}], "addresses": [{"deliveryPoint": ["Eberswalder Strasse 84"], "city": "M\u00fcncheberg", "administrativeArea": "Brandenburg", "postalCode": "15374", "country": "Germany"}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "https://ror.org/01ygyzs83", "name_url": "", "description": "ROR", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Patrick Liebmann", "organization": "Leibniz Universit\u00e4t Hannover", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "liebmann@ifbk.uni-hannover.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": {"url": null, "protocol": null, "protocol_url": "", "name": "0000-0002-0204-5857", "name_url": "", "description": "ORCID", "description_url": "", "applicationprofile": null, "applicationprofile_url": "", "function": null}}]}, {"name": "Cordula Vogel", "organization": "Technical University Dresden, Tharandt, Germany", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "cordula.vogel@tu-dresden.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Alexander Kholodov", "organization": "University of Alaska Fairbanks, Fairbanks, USA", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "alkholodov@alaska.edu"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Jir\u030c\u00ed B\u00e1rta", "organization": "University of South Bohemia", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "barta77@seznam.cz"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Muhammad Waqas", "organization": "University of South Bohemia", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "waqasuos1@gmail.com"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Milan Varsadiya", "organization": "University of South Bohemia", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "milanvarsadiya@gmail.com"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Haitao Wang", "organization": "University of Greifswald", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "haitao.wang@uni-greifswald.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Tim Urich", "organization": "University of Greifswald", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "tim.urich@uni-greifswald.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Tim Mansfeldt", "organization": "University of Cologne", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "Tim.Mansfeldt@uni-koeln.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Stefan Wessel-Bothe", "organization": "ecoTech Umwelt-Messsysteme GmbH, Bonn, Germany", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "swesselbothe@ecotech.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Olga Shibistova", "organization": "Leibniz Universit\u00e4t Hannover", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "olgas@ifbk.uni-hannover.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Georg Guggenberger", "organization": "Leibniz Universit\u00e4t Hannover", "position": null, "roles": ["author"], "phones": [{"value": null}], "emails": [{"value": "guggenberger@ifbk.uni-hannover.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"name": "Georg Guggenberger", "organization": "Leibniz Universit\u00e4t Hannover", "position": null, "roles": ["projectLeader"], "phones": [{"value": null}], "emails": [{"value": "guggenberger@ifbk.uni-hannover.de"}], "addresses": [{"deliveryPoint": [null], "city": null, "administrativeArea": null, "postalCode": null, "country": null}], "links": [{"href": null}]}, {"organization": "University of Greifswald;University of South Bohemia;Technical University Dresden, Tharandt, Germany;University of Cologne;Leibniz Universit\u00e4t Hannover;University of Alaska Fairbanks, Fairbanks, USA;ecoTech Umwelt-Messsysteme GmbH, Bonn, Germany", "roles": ["contributor"]}]}, "links": [{"href": "https://maps.bonares.de/mapapps/resources/apps/bonares/index.html?lang=en&mid=52141fd6-6d4c-4816-addf-9c29e15d4f4a", "rel": "information"}, {"href": "https://metadata.bonares.de:443/smartEditor/preview/20250707_Picture Graphical Abstract.JPG", "name": "preview", "description": "Web image thumbnail (URL)", "protocol": "WWW:LINK-1.0-http--image-thumbnail", "rel": "preview"}, {"rel": "self", "type": "application/geo+json", "title": "52141fd6-6d4c-4816-addf-9c29e15d4f4a", "name": "item", "description": "52141fd6-6d4c-4816-addf-9c29e15d4f4a", "href": 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{"concepts": [{"id": "Boden"}], "scheme": "GEMET - INSPIRE themes, version 1.0"}, {"concepts": [{"id": "Alaska"}], "scheme": "individual"}], "rights": "Restrictions applied to assure the protection of privacy or intellectual property, and any special restrictions or limitations or warnings on using the resource or metadata. Reports, articles, papers, scientific and non - scientific works of any form, including tables, maps, or any other kind of output, in printed or electronic form, based in whole or in part on the data supplied, must contain an acknowledgement of the form: \"Data reused from the BonaRes Data Centre www.bonares.de. This data were created as part of the ZALF Datenerfassung's research activities.\" Although every care has been taken in preparing and testing the data, the ZALF Datenerfassung and the BonaRes Data Centre cannot guarantee that the data are correct; neither does the ZALF Datenerfassung and the BonaRes Data Centre accept any liability whatsoever for any error, missing data or omission in the data, or for any loss or damage arising from its use. The ZALF Datenerfassung and BonaRes Data Centre will not be responsible for any direct or indirect use which might be made of the data.", "updated": "2025-07-21", "type": "Dataset", "created": "2025-07-07", "language": "eng", "title": "Freeze-thaw cycle experiments", "description": "This dataset includes redox potential data from 4 different freeze-thaw cycle (FTC) experiments. In one experiment, a water-saturated soil material was used and the other 3 experiments were conducted with quartz material. 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