{"type": "FeatureCollection", "features": [{"id": "10.1016/j.geoderma.2004.02.014", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:16:07Z", "type": "Journal Article", "created": "2004-04-10", "title": "Conversion Of Grassy Cerrado Into Riparian Forest And Its Impact On Soil Organic Matter Dynamics In An Oxisol From Southeast Brazil", "description": "Abstract   The purpose of this study was to evaluate possible changes in soil organic matter (SOM) dynamics after establishing riparian forests on soils previously under Brazilian savannah (\u201ccerrado\u201d). We selected a site with a homogeneous Typic Acric Red\u2013Yellow Latosol (Anionic Acrustox). Part of this site was maintained under native vegetation (grassy cerrado C 4 -dominated), and part was planted with riparian species (C 3 ) in 1992. Litter and soil samples were collected and analysed (total organic carbon, total nitrogen,  \u03b4  13 C isotopic analysis, and SOM density fractionation). Due to the predominance of grasses, carbon input was mainly below ground in cerrado. In such a soil, the decomposition process was more efficient, and much C and N were transferred to the heavy fraction. When forest was planted, there was a change from belowground to aboveground litter input (largely superficial), leading to higher C and N stocks in the light and lower stocks in the heavy fraction (resulting in lower stocks for bulk soil). The introduction of the C 3  vegetation decreased the soil  \u03b4  13 C signature. It has occurred particularly in the topsoil (0\u20135 cm) due to the deposition of C 3  litter on the soil surface. At the same time, the presence of cerrado-remaining C below 5 cm maintained higher  \u03b4  13 C values in this layer. During the 8 years after forest plantation, the input mode influenced both the  \u03b4  13 C distribution with depth, and the C replacement: between 0 and 2.5 cm, nearly 50% of cerrado-derived C was replaced by forest-derived C, while below 5 cm, replacement was around 20%. The relatively rapid C dynamics in this Oxisol (27% replacement in the top 20 cm after 8 years of forest plantation) shows that, under tropical conditions, significant changes may occur in a short period of time.", "keywords": ["delta-c-13", "decomposition", "c-13 natural-abundance", "particle-size fractions", "turnover", "0401 agriculture", " forestry", " and fisheries", "vegetation changes", "04 agricultural and veterinary sciences", "15. Life on land", "stable carbon isotope", "density fractions", "ratios", "nitrogen"], "contacts": [{"organization": "de Alcantara, F.A., Buurman, P., Furtini Neto, A.E., Curi, N., Roscoe, R.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1016/j.geoderma.2004.02.014"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Geoderma", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.geoderma.2004.02.014", "name": "item", "description": "10.1016/j.geoderma.2004.02.014", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.geoderma.2004.02.014"}, {"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": "10.1016/j.scitotenv.2008.11.046", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:16:31Z", "type": "Journal Article", "created": "2008-12-20", "title": "How Nitrogen And Sulphur Addition, And A Single Drought Event Affect Root Phosphatase Activity In Phalaris Arundinacea", "description": "Conservation and restoration of fens and fen meadows often aim to reduce soil nutrients, mainly nitrogen (N) and phosphorus (P). The biogeochemistry of P has received much attention as P-enrichment is expected to negatively impact on species diversity in wetlands. It is known that N, sulphur (S) and hydrological conditions affect the biogeochemistry of P, yet their interactive effects on P-dynamics are largely unknown. Additionally, in Europe, climate change has been predicted to lead to increases in summer drought. We performed a greenhouse experiment to elucidate the interactive effects of N, S and a single drought event on the P-availability for Phalaris arundinacea. Additionally, the response of plant phosphatase activity to these factors was measured over the two year experimental period. In contrast to results from earlier experiments, our treatments hardly affected soil P-availability. This may be explained by the higher pH in our soils, hampering the formation of Fe-P or Fe-Al complexes. Addition of S, however, decreased the plants N:P ratio, indicating an effect of S on the N:P stoichiometry and an effect on the plant's P-demand. Phosphatase activity increased significantly after addition of S, but was not affected by the addition of N or a single drought event. Root phosphatase activity was also positively related to plant tissue N and P concentrations, plant N and P uptake, and plant aboveground biomass, suggesting that the phosphatase enzyme influences P-biogeochemistry. Our results demonstrated that it is difficult to predict the effects of wetland restoration, since the involved mechanisms are not fully understood. Short-term and long-term effects on root phosphatase activity may differ considerably. Additionally, the addition of S can lead to unexpected effects on the biogeochemistry of P. Our results showed that natural resource managers should be careful when restoring degraded fens or preventing desiccation of fen ecosystems.", "keywords": ["summer", "0106 biological sciences", "plant tissue", "550", "Sulphate induced enzyme activity", "phosphorus limitation", "plant", "sulfate", "drought", "deposition", "Plant Roots", "01 natural sciences", "nitrogen", "iron", "biogeochemistry", "Root-surface phosphatase", "SDG 13 - Climate Action", "Phalaris", "species richness", "phosphorus", "N:P stoichiometry", "manager", "Plant Proteins", "2. Zero hunger", "pH", "grasslands", "Phosphorus", "dynamics", "04 agricultural and veterinary sciences", "wetland", "6. Clean water", "enzyme activity", "stoichiometry", "Europe", "eutrophication", "climate change", "Nitrogen", "growth", "fresh-water wetlands", "phosphatase", "soil", "desiccation", "Stress", " Physiological", "N:P ratios", "greenhouse", "N:P rations", "Fertilizers", "580", "Phosphorus uptake", "ecosystem", "biomass", "species diversity", "carbon", "nutrient", "15. Life on land", "Phosphoric Monoester Hydrolases", "enzyme", "fertilization", "13. Climate action", "Wetlands", "sulfur", "0401 agriculture", " forestry", " and fisheries", "Sulfur"]}, "links": [{"href": "https://doi.org/10.1016/j.scitotenv.2008.11.046"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Science%20of%20The%20Total%20Environment", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.scitotenv.2008.11.046", "name": "item", "description": "10.1016/j.scitotenv.2008.11.046", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.scitotenv.2008.11.046"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-03-01T00:00:00Z"}}, {"id": "10.1111/ele.13632", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:31Z", "type": "Journal Article", "created": "2020-08-11", "title": "Soil fungal mycelia have unexpectedly flexible stoichiometric C:N and C:P ratios", "description": "Abstract<p>Soil ecological stoichiometry provides powerful theories to integrate the complex interplay of element cycling and microbial communities into biogeochemical models. One essential assumption is that microbes maintain stable C:N:P (carbon:nitrogen:phosphorus) ratios independent of resource supply, although such homeostatic regulations have rarely been assessed in individual microorganisms. Here, we report an unexpected high flexibility in C:N and C:P values of saprobic fungi along nutrient supply gradients, overall ranging between 7\uffe2\uff80\uff90126 and 20\uffe2\uff80\uff901488, respectively, questioning microbial homeostasis. Fungal N:P varied comparatively less due to simultaneous reductions in mycelial N and P contents. As a mechanism, internal recycling processes during mycelial growth and an overall reduced N and P uptake appear more relevant than element storage. The relationships among fungal stoichiometry and growth disappeared in more complex media. These findings affect our interpretation of stoichiometric imbalances among microbes and soils and are highly relevant for developing microbial soil organic carbon and nitrogen models.</p>", "keywords": ["saprobic fungi", "0106 biological sciences", "0301 basic medicine", "2. Zero hunger", "570", "fungal nutrient retranslocation", "Nitrogen", "nutrient limitations", "microbial carbon sequestration", "Phosphorus", "500 Naturwissenschaften und Mathematik::570 Biowissenschaften; Biologie::570 Biowissenschaften; Biologie", "15. Life on land", "01 natural sciences", "Carbon", "soil ecological stoichiometry", "Soil", "element homeostasis", "03 medical and health sciences", "13. Climate action", "mycelial growth", "C:N:P ratios", "Soil Microbiology"]}, "links": [{"href": "https://onlinelibrary.wiley.com/doi/pdf/10.1111/ele.13632"}, {"href": "https://doi.org/10.1111/ele.13632"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Ecology%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/ele.13632", "name": "item", "description": "10.1111/ele.13632", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/ele.13632"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-11T00:00:00Z"}}, {"id": "10.5194/bg-17-3903-2020", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:38Z", "type": "Journal Article", "created": "2020-07-31", "title": "Leaf-scale quantification of the effect of photosynthetic gas exchange on \u0394&lt;sup&gt;17&lt;/sup&gt;O of atmospheric CO&lt;sub&gt;2&lt;/sub&gt;", "description": "<p>Abstract. Understanding the processes that affect the triple oxygen isotope composition of atmospheric CO2 during gas exchange can help constrain the interaction and fluxes between the atmosphere and the biosphere. We conducted leaf cuvette experiments under controlled conditions using three plant species. The experiments were conducted at two different light intensities and using CO2 with different \uffce\uff9417O. We directly quantify the effect of photosynthesis on \uffce\uff9417O of atmospheric CO2 for the first time. Our results demonstrate the established theory for \uffce\uffb418O is applicable to \uffce\uff9417O(CO2) at leaf level, and we confirm that the following two key factors determine the effect of photosynthetic gas exchange on the \uffce\uff9417O of atmospheric CO2. The relative difference between \uffce\uff9417O of the CO2 entering the leaf and the CO2 in equilibrium with leaf water and the back-diffusion flux of CO2 from the leaf to the atmosphere, which can be quantified by the cm\uffe2\uff88\uff95ca ratio, where ca is the CO2 mole fraction in the surrounding air and cm is the one at the site of oxygen isotope exchange between CO2 and H2O. At low cm\uffe2\uff88\uff95ca ratios the discrimination is governed mainly by diffusion into the leaf, and at high cm\uffe2\uff88\uff95ca ratios it is governed by back-diffusion of CO2 that has equilibrated with the leaf water. Plants with a higher cm\uffe2\uff88\uff95ca ratio modify the \uffce\uff9417O of atmospheric CO2 more strongly than plants with a lower cm\uffe2\uff88\uff95ca ratio. Based on the leaf cuvette experiments, the global value for discrimination against \uffce\uff9417O of atmospheric CO2 during photosynthetic gas exchange is estimated to be -0.57\uffc2\uffb10.14\uffe2\uff80\uff89\uffe2\uff80\uffb0 using cm\uffe2\uff88\uff95ca values of 0.3 and 0.7 for C4 and C3 plants, respectively. The main uncertainties in this global estimate arise from variation in cm\uffe2\uff88\uff95ca ratios among plants and growth conditions.                     </p>", "keywords": ["0106 biological sciences", "0301 basic medicine", "QE1-996.5", "CARBONIC-ANHYDRASE ACTIVITY", "Ecology", "OXYGEN-ISOTOPE FRACTIONATION", "MESOPHYLL CONDUCTANCE", "Geology", "15. Life on land", "01 natural sciences", "O-18/O-16 RATIOS", "MASS-INDEPENDENT FRACTIONATION", "03 medical and health sciences", "HIGH-PRECISION MEASUREMENTS", "Life", "13. Climate action", "3-DIMENSIONAL SYNTHESIS", "QH501-531", "STABLE-ISOTOPES", "Life Science", "14. Life underwater", "TRIPLE OXYGEN", "DIOXIDE", "QH540-549.5", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.5194/bg-17-3903-2020"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Biogeosciences", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.5194/bg-17-3903-2020", "name": "item", "description": "10.5194/bg-17-3903-2020", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/bg-17-3903-2020"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-03-27T00:00:00Z"}}, {"id": "10.5061/dryad.845kg37", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:23Z", "type": "Dataset", "title": "Data from: Resource acquisition strategies facilitate Gilbertiodendron dewevrei monodominance in African lowland forests", "description": "unspecified1. Tropical forests are hyperdiverse, yet extensive areas of monodominant  forest occur in the tropics worldwide. Most long-lived and persistent  monodominant tree species form ectomycorrhizal fungi symbioses, allowing  them to obtain nutrients directly from soil organic matter. This might  promote monodominance by reducing nutrient availability to co-occurring  species, the majority of which form associations with arbuscular  mycorrhizal fungi. 2. Gilbertiodendron dewevrei forest is the most  widespread monodominant forest in tropical Africa. Its distribution  appears determined in part by moisture availability, but its monodominance  is not thought to be driven by its fungal partner or soil fertility. 3.  Here we compare soil fertility of twenty G. dewevrei stands to mixed  forest from three sites across an 8,400 km2 region of the Central African  Republic and the Republic of Congo. In contrast to previous studies, we  find monodominant G. dewevrei stands associated with infertile soils, as  base cations (calcium, magnesium, total exchangeable bases) and  extractable manganese are extremely low, and significantly lower in soils  under G. dewevrei forest compared to mixed forest. Further, and consistent  with ectomycorrhizal forests globally, soil carbon to nitrogen and carbon  to phosphorus ratios are significantly higher in G. dewevrei stands than  in mixed forest stands, providing evidence in support of direct  acquisition of nitrogen and phosphorus from soil organic matter by  ectomycorrhizal fungi. 4. Gilbertiodendron dewevrei recruits from the  seedling bank, with its large seedlings surviving in high densities for  over a decade. We tested whether light plasticity could facilitate  monodominance by growing seedlings of G. dewevrei under controlled light  conditions. We found that its seedlings grow well under a wide range of  irradiance levels and conclude that this plasticity affords a competitive  advantage. 5. Synthesis: We reframe the discussion of factors contributing  to monodominance of G. dewevrei into one of resource acquisition and use  efficiency. In particular, G. dewevrei is associated with moist and  infertile soils and competes well under a variety of light conditions. Our  data is consistent with a model where root associations with  ectomycorrhizal fungi drive monodominance through the direct acquisition  of nutrients from soil organic matter, promoting nutrient limitation of  co-occurring species.", "keywords": ["2. Zero hunger", "C:N and C:P ratios", "Congo Basin", "Central Africa", "ectomycorrhizal fungi", "15. Life on land", "Monodominant tropical forest", "Gilbertiodendron dewevrei"], "contacts": [{"organization": "Hall, Jefferson, Harris, David, Saltonsall, Kristin, Medjibe, Vincent, Ashton, Mark, Turner, Benjamin,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.845kg37"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.845kg37", "name": "item", "description": "10.5061/dryad.845kg37", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.845kg37"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-08-26T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ratios&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=ratios&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=ratios&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=ratios&offset=5", "hreflang": "en-US"}], "numberMatched": 5, "numberReturned": 5, "distributedFeatures": [], "timeStamp": "2026-07-27T14:57:38.314337Z"}