{"type": "FeatureCollection", "features": [{"id": "10.1007/s00442-002-1005-6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:14:33Z", "type": "Journal Article", "created": "2003-02-13", "title": "Effects Of Elevated Co2 On Foliar Chemistry Of Saplings Of Nine Species Of Tropical Tree", "description": "This study examined the effects of elevated CO2 on secondary metabolites for saplings of tropical trees. In the first experiment, nine species of trees were grown in the ground in open-top chambers in central Panama at ambient and elevated CO2 (about twice ambient). On average, leaf phenolic contents were 48% higher under elevated CO2. Biomass accumulation was not affected by CO2, but starch, total non-structural carbohydrates and C/N ratios all increased. In a second experiment with Ficus, an early successional species, and Virola, a late successional species, treatments were enriched for both CO2 and nutrients. For both species, nutrient fertilization increased plant growth and decreased leaf carbohydrates, C/N ratios and phenolic contents, as predicted by the carbon/nutrient balance hypothesis. Changes in leaf C/N levels were correlated with changes in phenolic contents for Virola (r=0.95, P<0.05), but not for Ficus. Thus, elevated CO2, particularly under conditions of low soil fertility, significantly increased phenolic content as well as the C/N ratio of leaves. The magnitude of the changes is sufficient to negatively affect herbivore growth, survival and fecundity, which should have impacts on plant/herbivore interactions.", "keywords": ["0106 biological sciences", "2. Zero hunger", "elevated CO2", "Ecology", "Panama", "No3 Availability", "Performance", "Insect Herbivore Interactions", "Secondary Metabolism", "phenolic compounds", "15. Life on land", "01 natural sciences", "fertilization", "Atmospheric Co2", "Leaf Quality", "Responses", "tropical trees", "Deciduous Trees", "Phenolic-compounds", "Carbon-nutrient Balance"]}, "links": [{"href": "https://doi.org/10.1007/s00442-002-1005-6"}, {"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/s00442-002-1005-6", "name": "item", "description": "10.1007/s00442-002-1005-6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s00442-002-1005-6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2002-09-01T00:00:00Z"}}, {"id": "10.1007/s13595-016-0547-4", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:15:03Z", "type": "Journal Article", "created": "2016-03-24", "title": "Effects Of Experimental Warming On Soil Respiration And Biomass In Quercus Variabilis Blume And Pinus Densiflora Sieb. Et Zucc. Seedlings", "description": "AbstractKey messageIn the open-field warming experiment using infrared heaters, 3\u00a0\u00b0C warming affected soil respiration more in the deciduousQuercus variabilisBlume plot than in the evergreenPinus densifloraSieb. et Zucc. plot, but did not affect the plant biomass in either species.ContextUnderstanding the species-specific responses of belowground carbon processes to warming is essential for the accurate prediction of forest carbon cycles in ecosystems affected by future climate change.AimsThis study aimed to investigate the effect of experimental warming on soil CO2 efflux, soil-air CO2 concentration, and plant biomass for two taxonomically different temperate tree species.MethodsExperimental warming was conducted in an open-field planted with Q. variabilis and P. densiflora seedlings. Infrared heaters increased the air temperature by 3\u00a0\u00b0C in the warmed plots compared with the air temperature in the control plots over a 2-year period.ResultsThe increase in air and soil temperature stimulated soil CO2 efflux by 29 and 22\u00a0% for the Q. variabilis and P. densiflora plots, respectively. Seasonal variation in the warming effect on soil CO2 efflux was species-specific. Soil CO2 efflux was also positively related to both soil temperature and soil water content. The soil moisture deficit decreased the difference in soil CO2 efflux between the control and warmed plots. Warming did not affect soil CO2 concentration and plant biomass in either species; however, the mean soil CO2 concentration was positively correlated with root and total biomass.ConclusionWarming increased soil CO2 efflux in both Q. variabilis and P. densiflora plots, while the increase showed remarkable seasonal variations and different magnitudes for the two species.", "keywords": ["0106 biological sciences", "soil temperature", "evergreen tree", "soil water", "Red pine", "seedling", "soil respiration", "01 natural sciences", "experimental study", "Pinus resinosa", "Climate change", "Pinus densiflora", "seasonal variation", "concentration (composition)", "Quercus variabilis", "Oriental oak", "carbon dioxide", "Soil respiration", "04 agricultural and veterinary sciences", "15. Life on land", "air temperature", "carbon flux", "[SDV] Life Sciences [q-bio]", "climate change", "13. Climate action", "coniferous tree", "phytomass", "0401 agriculture", " forestry", " and fisheries", "Experimental warming", "soil moisture", "deciduous tree"]}, "links": [{"href": "https://doi.org/10.1007/s13595-016-0547-4"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Annals%20of%20Forest%20Science", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s13595-016-0547-4", "name": "item", "description": "10.1007/s13595-016-0547-4", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s13595-016-0547-4"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-03-24T00:00:00Z"}}, {"id": "10.5061/dryad.0m9n57k", "type": "Feature", "geometry": null, "properties": {"updated": "2026-09-21T16:19:44Z", "type": "Dataset", "title": "Data from: The effect of drought and season on root life span in temperate arbuscular mycorrhizal and ectomycorrhizal tree species", "description": "unspecifiedLiese_etal_morphological_and_functional_traitsBelowground and aboveground morphological and functional traitsLiese_etal_lifespan_and_proportional_hazardsRoot lifespan and data for the calculation of proportional hazards", "keywords": ["2. Zero hunger", "Ectomycorrhiza", "plant-soil (below-ground) interactions", "mini-rhizotrons", "deciduous tree species", "arbuscular mycorrhiza", "Season", "15. Life on land", "root morphology", "6. Clean water"], "contacts": [{"organization": "Liese, Rebecca, Leuschner, Christoph, Meier, Ina Christin,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.0m9n57k"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.0m9n57k", "name": "item", "description": "10.5061/dryad.0m9n57k", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.0m9n57k"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-05-10T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=deciduous+tree&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=deciduous+tree&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=deciduous+tree&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=deciduous+tree&offset=3", "hreflang": "en-US"}], "numberMatched": 3, "numberReturned": 3, "distributedFeatures": [], "timeStamp": "2026-09-22T06:56:19.419249Z"}