{"type": "FeatureCollection", "features": [{"id": "10.1007/s00442-012-2576-5", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:14:41Z", "type": "Journal Article", "created": "2013-01-22", "title": "An Alpine Treeline In A Carbon Dioxide-Rich World: Synthesis Of A Nine-Year Free-Air Carbon Dioxide Enrichment Study", "description": "Open AccessOecologia, 171 (3)", "keywords": ["Carbon cycling", "0106 biological sciences", "0301 basic medicine", "Nitrogen", "Dwarf shrub", "Carbon Dioxide", "Plant Roots", "01 natural sciences", "Trees", "Soil", "03 medical and health sciences", "Carbon cycling; Dwarf shrub; Global change; Nitrogen; Treeline conifer", "Treeline conifer", "Global change", "Ecosystem", "Plant Physiological Phenomena", "Soil Microbiology", "Switzerland"]}, "links": [{"href": "https://doi.org/10.1007/s00442-012-2576-5"}, {"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/s00442-012-2576-5", "name": "item", "description": "10.1007/s00442-012-2576-5", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-012-2576-5"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-01-23T00:00:00Z"}}, {"id": "10.1007/s10021-012-9580-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:14:45Z", "type": "Journal Article", "created": "2012-08-01", "title": "Effects Of Warming On Shrub Abundance And Chemistry Drive Ecosystem-Level Changes In A Forest-Tundra Ecotone", "description": "Tundra vegetation is responding rapidly to on-going climate warming. The changes in plant abundance and chemistry might have cascading effects on tundra food webs, but an integrated understanding of how the responses vary between habitats and across environmental gradients is lacking. We assessed responses in plant abundance and plant chemistry to warmer climate, both at species and community levels, in two different habitats. We used a long-term and multisite warming (OTC) experiment in the Scandinavian forest-tundra ecotone to investigate (i) changes in plant community composition and (ii) responses in foliar nitrogen, phosphorus, and carbon-based secondary compound concentrations in two dominant evergreen dwarf-shrubs (Empetrum hermaphroditum and Vaccinium vitis-idaea) and two deciduous shrubs (Vaccinium myrtillus and Betula nana). We found that initial plant community composition, and the functional traits of these plants, will determine the responsiveness of the community composition, and thus community traits, to experimental warming. Although changes in plant chemistry within species were minor, alterations in plant community composition drive changes in community-level nutrient concentrations. In view of projected climate change, our results suggest that plant abundance will increase in the future, but nutrient concentrations in the tundra field layer vegetation will decrease. These effects are large enough to have knock-on consequences for major ecosystem processes like herbivory and nutrient cycling. The reduced food quality could lead to weaker trophic cascades and weaker top down control of plant community biomass and composition in the future. However, the opposite effects in forest indicate that these changes might be obscured by advancing treeline forests. \u00a9 2012 Springer Science+Business Media, LLC.", "keywords": ["580", "0106 biological sciences", "570", "P.", "Global warming", "500", "CBSC", "P", "N", "15. Life on land", "global warming", "01 natural sciences", "333", "Treeline", "secondary plant metabolite", "Shrub", "Grazing", "Secondary plant metabolite", "shrub", "13. Climate action", "reindeer", "grazing", "Reindeer"]}, "links": [{"href": "http://dspace.stir.ac.uk/bitstream/1893/28101/1/Kaarlej%c3%a4rvi2012_Article_EffectsOfWarmingOnShrubAbundan.pdf"}, {"href": "http://dro.dur.ac.uk/13492/1/13492.pdf"}, {"href": "https://doi.org/10.1007/s10021-012-9580-9"}, {"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/s10021-012-9580-9", "name": "item", "description": "10.1007/s10021-012-9580-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10021-012-9580-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-08-02T00:00:00Z"}}, {"id": "10.1007/s10021-020-00512-9", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:14:46Z", "type": "Journal Article", "created": "2020-05-21", "title": "Effects of Litter Quality Diminish and Effects of Vegetation Type Develop During Litter Decomposition of Two Shrub Species in an Alpine Treeline Ecotone", "description": "Because climate change is predicted to have a strong impact on high-altitude ecosystems, a better knowledge of litter decomposition in alpine ecosystems is critical to improve our predictions of the effect of climate change on ecosystem processes and services such as nutrient cycling, carbon sequestration, and below-ground biodiversity. To evaluate the effects of vegetation types [alpine shrubland (AS) and alpine meadow (AM)] and litter quality on litter decomposition and related biochemical processes, the decomposition of leaf litter of two dominant shrub species, Sorbus rufopilosa (SR, high quality) and Rhododendron lapponicum (RL, low quality), was studied using the litterbag method in an alpine treeline ecotone on the eastern Tibetan Plateau. After 1 year of decomposition, cellulolytic enzyme activities and gram-negative bacterial biomass were higher in shrubland than in meadow. However, higher fungal biomass, fungal/bacteria ratio and ligninolytic activity were observed in meadow than in shrubland after 2 years of decomposition. During the first year of decomposition, litter decomposition was faster in shrubland than in meadow probably due to the home-field advantage (HFA) effect and the bacteria-dominated decomposition, whereas in later decomposition stages, litter decomposition was faster in meadow than in shrubland, as the HFA effect diminished and fungal-dominated decomposition of recalcitrant components took over. These results indicated that litter quality effects were generally strongest in the first year and diminished in later stages when the effect of vegetation type in incubation sites developed.", "keywords": ["Lignocellulolytic enzyme", "2. Zero hunger", "0106 biological sciences", "Litter quality", "Litter decomposition", "500", "15. Life on land", "Soil carbon", "01 natural sciences", "Alpine treeline ecotone", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "13. Climate action", "Microbial community", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology"]}, "links": [{"href": "https://doi.org/10.1007/s10021-020-00512-9"}, {"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/s10021-020-00512-9", "name": "item", "description": "10.1007/s10021-020-00512-9", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10021-020-00512-9"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-05-21T00:00:00Z"}}, {"id": "10.1007/s11104-017-3235-8", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:15:13Z", "type": "Journal Article", "created": "2017-03-29", "title": "Responses Of Soil Extracellular Enzyme Activities To Experimental Warming And Co2 Enrichment At The Alpine Treeline", "description": "Climate warming and elevated CO2 can modify nutrient cycling mediated by enzymes in soils, especially in cold-limited ecosystems with a low availability of nutrients and a high temperature sensitivity of decomposition and mineralization. We estimated responses of soil extracellular enzyme activities (EEAs) to 6\u00a0years of soil warming and 9\u00a0years of CO2 enrichment at an Alpine treeline site. EEAs were measured in the litter (L), fermentation (F) and humified (H) horizons under Larix decidua and Pinus uncinata trees.                          Soil warming indirectly affected EEAs through altered soil moisture, fine root biomass, and C:N ratio of the organic horizons. Warming increased \u03b2-glucosidase and \u03b2-xylosidase activities in the F horizon but led to reduced laccase activity in the L horizon, probably caused by drying of the litter horizon associated with the treatment. In the H horizon, previous CO2 enrichment altered the activity of leucine amino peptidase, N-acetylglucosaminidase, and phosphatase. No interactive effects between warming and CO2 enrichment were detected. Warming affected the temperature sensitivity of \u03b2-xylosidase but not of the other enzymes. Altered EEAs after six years of soil warming indicate a sustained stimulation of carbon, nitrogen and nutrient cycling under climatic warming at the alpine treeline.", "keywords": ["0106 biological sciences", "High Temperature", "Nutrient Cycling", "Climate Change", "Larix Decidua", "Fine Root", "04 agricultural and veterinary sciences", "Alpine Environment", "Carbon Dioxide", "15. Life on land", "01 natural sciences", "Treeline", "Enzyme Activity", "10122 Institute of Geography", "Coniferous Tree", "Pinus Uncinata", "13. Climate action", "Fermentation", "1110 Plant Science", "0401 agriculture", " forestry", " and fisheries", "Global Change", "Warming", "910 Geography & travel", "1111 Soil Science"]}, "links": [{"href": "https://doi.org/10.1007/s11104-017-3235-8"}, {"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/s11104-017-3235-8", "name": "item", "description": "10.1007/s11104-017-3235-8", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s11104-017-3235-8"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2017-03-29T00:00:00Z"}}, {"id": "10.1046/j.1365-2745.1998.00278.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:18:26Z", "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": "10.5061/dryad.79cnp5htw", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:22:30Z", "type": "Dataset", "title": "Data from: A tipping-point in carbon storage when forest expands into tundra is related to mycorrhizal recycling of nitrogen", "description": "unspecifiedTundra ecosystems are global belowground sinks for atmospheric CO2.  Ongoing warming-induced encroachment by shrubs and trees risks turning  this sink into a CO2 source, resulting in a positive feedback on climate  warming. To advance mechanistic understanding of how shifts in mycorrhizal  types affect long-term carbon (C) and nitrogen (N) stocks, we studied  small-scale soil depth profiles of fungal communities and C-N dynamics  across a subarctic-alpine forest-heath vegetation gradient. Belowground  organic stocks decreased abruptly at the transition from heath to forest,  linked to the presence of certain tree-associateds ectomycorrhizal fungi  that contribute to decomposition when mining N from organic matter. In  contrast, ericoid mycorrhizal plants and fungi were associated with  organic matter accumulation and slow decomposition. If climatic controls  on arctic-alpine forest lines are relaxed, increased decomposition will  likely outbalance increased plant productivity, decreasing the overall C  sink capacity of displaced tundra.", "keywords": ["C-N dynamics", "ectomycorrhizal exploration type", "functional genes", "ergosterol", "ITS2 meta-barcoding", "Fungal community", "Arctic greening", "Climate feedback", "15. Life on land", "litter saprotrophs", "mycorrhizal type", "litter bags", "13. Climate action", "soil solution", "FOS: Biological sciences", "soil carbon storage", "quantitative PCR", "soil profiles", "Ectomycorrhizal fungal community", "Ericoid Mycorrhiza", "treeline ecotone"], "contacts": [{"organization": "Clemmensen, Karina E, Durling, Mikael B, Michelsen, Anders, Hallin, Sara, Finlay, Roger D, Lindahl, Bj\u00f6rn D,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.79cnp5htw"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.79cnp5htw", "name": "item", "description": "10.5061/dryad.79cnp5htw", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.79cnp5htw"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-02-28T00:00:00Z"}}, {"id": "10.5061/dryad.wm37pvmt3", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:22:39Z", "type": "Dataset", "created": "2023-06-28", "title": "Tree biomass does not correlate with soil carbon stocks in forest-tundra ecotones along a 1100 km latitudinal gradient in Norway", "description": "Due to climate warming, forests are expanding to higher elevations and  latitudes at the expense of tundra vegetation. While the subsequent  increase in aboveground biomass is well-documented, there is much  speculation regarding the effects on soil organic carbon (SOC) stocks. To  provide insight into the consequences of tree encroachment into treeless  tundra, we sampled SOC stocks across 36 forest-tundra ecotones along a  1100 km latitudinal gradient in Norway. Our results show that SOC stocks  vary greatly within, as well as among treeline ecotones, and that SOC  stocks do not correlate with tree biomass and tree species. SOC stocks do  increase with temperature, and vary with slope steepness, slope aspect,  and soil parent material. Applying a \u2018space-for-time substitution\u2019  perspective, our findings suggest that tree encroachment into tundra is  unlikely to have immediate consequences for SOC stocks.", "keywords": ["treeline", "13. Climate action", "Norway", "Forest-tundra ecotone", "boreal forest", "15. Life on land", "Tundra", "Soil carbon", "FOS: Natural sciences"], "contacts": [{"organization": "Devos, Claire C\u00e9line, Ohlson, Mikael, N\u00e6sset, Erik, Klanderud, Kari, Bollands\u00e5s, Ole Martin,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.wm37pvmt3"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.wm37pvmt3", "name": "item", "description": "10.5061/dryad.wm37pvmt3", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.wm37pvmt3"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-07-10T00:00:00Z"}}, {"id": "3027069304", "type": "Feature", "geometry": null, "properties": {"updated": "2026-04-13T16:27:34Z", "type": "Journal Article", "created": "2020-05-21", "title": "Effects of Litter Quality Diminish and Effects of Vegetation Type Develop During Litter Decomposition of Two Shrub Species in an Alpine Treeline Ecotone", "description": "Because climate change is predicted to have a strong impact on high-altitude ecosystems, a better knowledge of litter decomposition in alpine ecosystems is critical to improve our predictions of the effect of climate change on ecosystem processes and services such as nutrient cycling, carbon sequestration, and below-ground biodiversity. To evaluate the effects of vegetation types [alpine shrubland (AS) and alpine meadow (AM)] and litter quality on litter decomposition and related biochemical processes, the decomposition of leaf litter of two dominant shrub species, Sorbus rufopilosa (SR, high quality) and Rhododendron lapponicum (RL, low quality), was studied using the litterbag method in an alpine treeline ecotone on the eastern Tibetan Plateau. After 1 year of decomposition, cellulolytic enzyme activities and gram-negative bacterial biomass were higher in shrubland than in meadow. However, higher fungal biomass, fungal/bacteria ratio and ligninolytic activity were observed in meadow than in shrubland after 2 years of decomposition. During the first year of decomposition, litter decomposition was faster in shrubland than in meadow probably due to the home-field advantage (HFA) effect and the bacteria-dominated decomposition, whereas in later decomposition stages, litter decomposition was faster in meadow than in shrubland, as the HFA effect diminished and fungal-dominated decomposition of recalcitrant components took over. These results indicated that litter quality effects were generally strongest in the first year and diminished in later stages when the effect of vegetation type in incubation sites developed.", "keywords": ["Lignocellulolytic enzyme", "0106 biological sciences", "2. Zero hunger", "Litter quality", "Litter decomposition", "500", "15. Life on land", "Soil carbon", "01 natural sciences", "Alpine treeline ecotone", "[SDE.BE] Environmental Sciences/Biodiversity and Ecology", "13. Climate action", "Microbial community", "[SDE.BE]Environmental Sciences/Biodiversity and Ecology"]}, "links": [{"href": "https://doi.org/3027069304"}, {"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": "3027069304", "name": "item", "description": "3027069304", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/3027069304"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-05-21T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Treeline&f=json", "hreflang": "en-US"}, {"rel": "alternate", "type": "text/html", "title": "This document as HTML", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Treeline&f=html", "hreflang": "en-US"}, {"rel": "collection", "type": "application/json", "title": "Collection URL", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main", "hreflang": "en-US"}, {"type": "application/geo+json", "rel": "first", "title": "items (first)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Treeline&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Treeline&offset=8", "hreflang": "en-US"}], "numberMatched": 8, "numberReturned": 8, "distributedFeatures": [], "timeStamp": "2026-04-16T14:28:06.583354Z"}