{"type": "FeatureCollection", "features": [{"id": "10.1002/ppp.2250", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:14:05Z", "type": "Journal Article", "created": "2024-09-09", "title": "Rainfall Impacts Dissolved Organic Matter and Cation Export From Permafrost Catchments and a Glacial River During Late Summer in Northeast Greenland", "description": "ABSTRACT

Ongoing and amplified climate change in the Arctic is leading to glacier retreat and to the exposure of an ever\uffe2\uff80\uff90larger portion of non\uffe2\uff80\uff90glaciated permafrost\uffe2\uff80\uff90dominated landscapes. Warming will also cause more precipitation to fall as rain, further enhancing the thaw of previously frozen ground. Yet, the impact of those perturbations on the geochemistry of Arctic rivers remains a subject of debate. Here, we determined the geochemical composition of waters from various contrasting non\uffe2\uff80\uff90glacial permafrost catchments and investigated their impact on a glacially dominated river, the Zackenberg River (Northeast Greenland), during late summer (August 2019). We also studied the effect of rainfall on the geochemistry of the Zackenberg River, its non\uffe2\uff80\uff90glacial tributaries, and a nearby independent non\uffe2\uff80\uff90glacial headwater stream Gr\uffc3\uffa6nse. We analyzed water properties, quantified and characterized dissolved organic matter (DOM) using absorbance and fluorescence spectroscopy and radiocarbon isotopes, and set this alongside analyses of the major cations (Ca, Mg, Na, and K), dissolved silicon (Si), and germanium/silicon ratios (Ge/Si). The glacier\uffe2\uff80\uff90fed Zackenberg River contained low concentrations of major cations, dissolved Si and dissolved organic carbon (DOC), and a Ge/Si ratio typical of bulk rock. Glacial DOM was enriched in protein\uffe2\uff80\uff90like fluorescent DOM and displayed relatively depleted radiocarbon values (i.e., old DOM). Non\uffe2\uff80\uff90glacial streams (i.e., tributaries and Gr\uffc3\uffa6nse) had higher concentrations of major cations and DOC and DOM enriched in aromatic compounds. They showed a wide range of values for radiocarbon, Si and Ge/Si ratios associated with variable contributions of surface runoff relative to deep active layer leaching. Before the rain event, Zackenberg tributaries did not contribute notably to the solute export of the Zackenberg River, and supra\uffe2\uff80\uff90permafrost ground waters governed the supply of solutes in Zackenberg tributaries and Gr\uffc3\uffa6nse stream. After the rain event, surface runoff modified the composition of Gr\uffc3\uffa6nse stream, and non\uffe2\uff80\uff90glacial tributaries strongly increased their contribution to the Zackenberg River solute export. Our results show that summer rainfall events provide an additional source of DOM and Si\uffe2\uff80\uff90rich waters from permafrost\uffe2\uff80\uff90underlain catchments to the discharge of glacially dominated rivers. This suggests that the magnitude and composition of solute exports from Arctic rivers are modulated by permafrost thaw and summer rain events. This event\uffe2\uff80\uff90driven solute supply will likely impact the carbon cycle in rivers, estuaries, and oceans and should be included into future predictions of carbon balance in these vulnerable Arctic systems.Quantifying the upper limit of stable soil carbon storage is essential for guiding policies to increase soil carbon storage. One pool of carbon considered particularly stable across climate zones and soil types is formed when dissolved organic carbon sorbs to minerals. We quantified, for the first time, the potential of mineral soils to sorb additional dissolved organic carbon (DOC) for six soil orders. We compiled 402 laboratory sorption experiments to estimate the additional DOC sorption potential, that is the potential of excess DOC sorption in addition to the existing background level already sorbed in each soil sample. We estimated this potential using gridded climate and soil geochemical variables within a machine learning model. We find that mid- and low-latitude soils and subsoils have a greater capacity to store DOC by sorption compared to high-latitude soils and topsoils. The global additional DOC sorption potential for six soil orders is estimated to be 107 $$ pm$$ \uffc2\uffb1 13 Pg C to 1\uffc2\uffa0m depth. If this potential was realized, it would represent a 7% increase in the existing total carbon stock.Photochemical degradation of dissolved organic matter (DOM) has been the subject of numerous studies; however, its regulation along the inland water continuum is still unclear. We aimed to unravel the DOM photoreactivity and concurrent DOM compositional changes across 30 boreal aquatic ecosystems including peat waters, streams, rivers, and lakes distributed along a water residence time (WRT) gradient. Samples were subjected to a standardized exposure of simulated sunlight. We measured the apparent quantum yield (AQY), which corresponds to DOM photomineralization per photon absorbed, and the compositional change in DOM at bulk and individual compound levels in the original samples and after irradiation. AQY increased with the abundance of terrestrially derived DOM and decreased at higher WRT. Additionally, the photochemical changes in both DOM optical properties and molecular composition resembled changes along the natural boreal WRT gradient at low WRT (<3\uffc2\uffa0years). Accordingly, mass spectrometry revealed that the abundance of photolabile and photoproduced molecules decreased with WRT along the boreal aquatic continuum. Our study highlights the tight link between DOM composition and DOM photodegradation. We suggest that photodegradation is an important driver of DOM composition change in waters with low WRT, where DOM is highly photoreactive.The magnitude of future emissions of greenhouse gases from the northern permafrost region depends crucially on the mineralization of soil organic carbon (SOC) that has accumulated over millennia in these perennially frozen soils. Many recent studies have used radiocarbon (14C) to quantify the release of this \uffe2\uff80\uff9cold\uffe2\uff80\uff9d SOC as CO2 or CH4 to the atmosphere or as dissolved and particulate organic carbon (DOC and POC) to surface waters. We compiled ~1,900 14C measurements from 51 sites in the northern permafrost region to assess the vulnerability of thawing SOC in tundra, forest, peatland, lake, and river ecosystems. We found that growing season soil 14C\uffe2\uff80\uff90CO2 emissions generally had a modern (post\uffe2\uff80\uff901950s) signature, but that well\uffe2\uff80\uff90drained, oxic soils had increased CO2 emissions derived from older sources following recent thaw. The age of CO2 and CH4 emitted from lakes depended primarily on the age and quantity of SOC in sediments and on the mode of emission, and indicated substantial losses of previously frozen SOC from actively expanding thermokarst lakes. Increased fluvial export of aged DOC and POC occurred from sites where permafrost thaw caused soil thermal erosion. There was limited evidence supporting release of previously frozen SOC as CO2, CH4, and DOC from thawing peatlands with anoxic soils. This synthesis thus suggests widespread but not universal release of permafrost SOC following thaw. We show that different definitions of \uffe2\uff80\uff9cold\uffe2\uff80\uff9d sources among studies hamper the comparison of vulnerability of permafrost SOC across ecosystems and disturbances. We also highlight opportunities for future 14C studies in the permafrost region.The leaching of dissolved organic carbon (DOC) from soils to the river network is an overlooked component of the terrestrial soil C budget. Measurements of DOC concentrations in soil, runoff and drainage are scarce and their spatial distribution highly skewed towards industrialized countries. The contribution of terrestrial DOC leaching to the global\uffe2\uff80\uff90scale C balance of terrestrial ecosystems thus remains poorly constrained. Here, using a process based, integrative, modelling approach to upscale from existing observations, we estimate a global terrestrial DOC leaching flux of 0.28\uffc2\uffa0\uffc2\uffb1\uffc2\uffa00.07\uffc2\uffa0Gt\uffc2\uffa0C\uffc2\uffa0year\uffe2\uff88\uff921 which is conservative, as it only includes the contribution of mineral soils. Our results suggest that globally about 15% of the terrestrial Net Ecosystem Productivity (NEP, calculated as the difference between Net Primary Production and soil respiration) is exported to aquatic systems as leached DOC. In the tropical rainforest, the leached fraction of terrestrial NEP even reaches 22%. Furthermore, we simulated spatial\uffe2\uff80\uff90temporal trends in DOC leaching from soil to the river networks from 1860 to 2010. We estimated a global increase in terrestrial DOC inputs to river network of 35\uffc2\uffa0Tg\uffc2\uffa0C\uffc2\uffa0year\uffe2\uff88\uff921 (14%) from 1860 to 2010. Despite their low global contribution to the DOC leaching flux, boreal regions have the highest relative increase (28%) while tropics have the lowest relative increase (9%) over the historical period (1860s compared to 2000s). The results from our observationally constrained model approach demonstrate that DOC leaching is a significant flux in the terrestrial C budget at regional and global scales.Globally, inland waters emit over 2 Pg of carbon per year as carbon dioxide, of which the majority originates from streams and rivers. Despite the global significance of fluvial carbon dioxide emissions, little is known about their diel dynamics. Here we present a large-scale assessment of day- and night-time carbon dioxide fluxes at the water-air interface across 34 European streams. We directly measured fluxes four times between October 2016 and July 2017 using drifting chambers. Median fluxes are 1.4 and 2.1\uffe2\uff80\uff89mmol\uffe2\uff80\uff89m\uffe2\uff88\uff922 h\uffe2\uff88\uff921 at midday and midnight, respectively, with night fluxes exceeding those during the day by 39%. We attribute diel carbon dioxide flux variability mainly to changes in the water partial pressure of carbon dioxide. However, no consistent drivers could be identified across sites. Our findings highlight widespread day-night changes in fluvial carbon dioxide fluxes and suggest that the time of day greatly influences measured carbon dioxide fluxes across European streams.Fluorescence is an easily available analytical technique used to assess the optical characteristics of dissolved organic matter (DOM).

", "keywords": ["[SDU.OCEAN]Sciences of the Universe [physics]/Ocean", " Atmosphere", "[SDU.OCEAN]Sciences of the Universe [physics]/Ocean", "570", "Atmosphere", "[SDU.OCEAN] Sciences of the Universe [physics]/Ocean", " Atmosphere", "Hydrogen-Ion Concentration", "Milj\u00f6vetenskap", "Dissolved Organic Matter", "01 natural sciences", "[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces", " environment", "Lakes", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", "Organic Chemicals", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", " environment", "environment", "Environmental Sciences", "Humic Substances", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://pubs.rsc.org/en/content/articlepdf/2022/AY/D1AY01702K"}, {"href": "https://doi.org/10.1039/d1ay01702k"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Analytical%20Methods", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1039/d1ay01702k", "name": "item", "description": "10.1039/d1ay01702k", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1039/d1ay01702k"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-01-01T00:00:00Z"}}, {"id": "10.1088/1748-9326/8/2/024017", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:09Z", "type": "Journal Article", "created": "2013-05-03", "title": "Winter Climate Controls Soil Carbon Dynamics During Summer In Boreal Forests", "description": "Boreal forests, characterized by distinct winter seasons, store a large proportion of the global terrestrial carbon (C) pool. We studied summer soil C-dynamics in a boreal forest in northern Sweden using a seven-year experimental manipulation of soil frost. We found that winter soil climate conditions play a major role in controlling the dissolution/mineralization of soil organic-C in the following summer season. Intensified soil frost led to significantly higher concentrations of dissolved organic carbon (DOC). Intensified soil frost also led to higher rates of basal heterotrophic CO _2 production in surface soil samples. However, frost-induced decline in the in situ soil CO _2 concentrations in summer suggests a substantial decline in root and/or plant associated rhizosphere CO _2 production, which overrides the effects of increased heterotrophic CO _2 production. Thus, colder winter soils, as a result of reduced snow cover, can substantially alter C-dynamics in boreal forests by reducing summer soil CO _2 efflux, and increasing DOC losses.", "keywords": ["soil frost", "carbon dynamics", "Science", "Physics", "QC1-999", "Q", "heterotrophic CO2 production", "04 agricultural and veterinary sciences", "15. Life on land", "dissolved organic carbon", "Environmental technology. Sanitary engineering", "01 natural sciences", "Environmental sciences", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "GE1-350", "boreal forest", "summer season", "TD1-1066", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1088/1748-9326/8/2/024017"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Research%20Letters", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1088/1748-9326/8/2/024017", "name": "item", "description": "10.1088/1748-9326/8/2/024017", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1088/1748-9326/8/2/024017"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2013-05-03T00:00:00Z"}}, {"id": "10.1111/gcbb.12401", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:37Z", "type": "Journal Article", "created": "2016-09-03", "title": "Investigating The Biochar Effects On C-Mineralization And Sequestration Of Carbon In Soil Compared With Conventional Amendments Using The Stable Isotope (Delta C-13) Approach", "description": "Abstract

Biomass\uffe2\uff80\uff90derived black carbon (biochar) is considered to be an effective tool to mitigate global warming by long\uffe2\uff80\uff90term C\uffe2\uff80\uff90sequestration in soil and to influence C\uffe2\uff80\uff90mineralization via priming effects. However, the underlying mechanism of biochar (BC) priming relative to conventional biowaste (BW) amendments remains uncertain. Here, we used a stable carbon isotope (\uffce\uffb413C) approach to estimate the possible biochar effects on native soil C\uffe2\uff80\uff90mineralization compared with various BW additions and potential carbon sequestration. The results show that immediately after application, BC suppresses and then increases C\uffe2\uff80\uff90mineralization, causing a loss of 0.14\uffe2\uff80\uff937.17\uffc2\uffa0mg\uffe2\uff80\uff90CO2\uffe2\uff80\uff93C\uffc2\uffa0g\uffe2\uff88\uff921\uffe2\uff80\uff90C compared to the control (0.24\uffe2\uff80\uff931.86\uffc2\uffa0mg\uffe2\uff80\uff90CO2\uffe2\uff80\uff93C\uffc2\uffa0g\uffe2\uff88\uff921\uffe2\uff80\uff90C) over 1\uffe2\uff80\uff93120\uffc2\uffa0days. Negative priming was observed for BC compared to various BW amendments (\uffe2\uff88\uff9210.22 to \uffe2\uff88\uff9223.56\uffc2\uffa0mg\uffe2\uff80\uff90CO2\uffe2\uff80\uff93C\uffc2\uffa0g\uffe2\uff88\uff921\uffe2\uff80\uff90soil\uffe2\uff80\uff90C); however, it was trivially positive relative to that of the control (8.64\uffc2\uffa0mg\uffe2\uff80\uff90CO2\uffe2\uff80\uff93C\uffc2\uffa0g\uffe2\uff88\uff921\uffe2\uff80\uff90soil\uffe2\uff80\uff90C). Furthermore, according to the residual carbon and \uffce\uffb413C signature of postexperimental soil carbon, BC\uffe2\uff80\uff90C significantly increased (P\uffc2\uffa0<\uffc2\uffa00.05) the soil carbon stock by carbon sequestration in soil compared with various biowaste amendments. The results of cumulative CO2\uffe2\uff80\uff93C emissions, relative priming effects, and carbon storage indicate that BC reduces C\uffe2\uff80\uff90mineralization, resulting in greater C\uffe2\uff80\uff90sequestration compared with other BW amendments, and the magnitude of this effect initially increases and then decreases and stabilizes over time, possibly due to the presence of recalcitrant\uffe2\uff80\uff90C (4.92\uffc2\uffa0mg\uffe2\uff80\uff90C\uffc2\uffa0g\uffe2\uff88\uff921\uffe2\uff80\uff90soil) in BC, the reduced microbial activity, and the sorption of labile organic carbon (OC) onto BC particles.

", "keywords": ["Technology", "Energy & Fuels", "550", "SEA-LEVEL RISE", "PYROLYSIS TEMPERATURE", "WORLD", "DISSOLVED ORGANIC-CARBON", "ATMOSPHERIC CO2", "EMISSIONS", "Science & Technology", "MICROBIAL BIOMASS", "Agriculture", "Biowaste", "04 agricultural and veterinary sciences", "15. Life on land", "Priming Effects", "Carbon Mineralization", "Agronomy", "Carbon Stable Isotope", "Biochar", "Biotechnology & Applied Microbiology", "POOLS", "13. Climate action", "SHORT-TERM", "0401 agriculture", " forestry", " and fisheries", "Life Sciences & Biomedicine", "MATTER", "C-sequestration"]}, "links": [{"href": "https://doi.org/10.1111/gcbb.12401"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/GCB%20Bioenergy", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/gcbb.12401", "name": "item", "description": "10.1111/gcbb.12401", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/gcbb.12401"}, {"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": "10.1111/j.1365-2486.2005.01001.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:41Z", "type": "Journal Article", "created": "2005-08-19", "title": "Soil Organic Matter And Litter Chemistry Response To Experimental N Deposition In Northern Temperate Deciduous Forest Ecosystems", "description": "Abstract

The effects of atmospheric nitrogen (N) deposition on organic matter decomposition vary with the biochemical characteristics of plant litter. At the ecosystem\uffe2\uff80\uff90scale, net effects are difficult to predict because various soil organic matter (SOM) fractions may respond differentially. We investigated the relationship between SOM chemistry and microbial activity in three northern deciduous forest ecosystems that have been subjected to experimental N addition for 2 years. Extractable dissolved organic carbon (DOC), DOC aromaticity, C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio, and functional group distribution, measured by Fourier transform infrared spectra (FTIR), were analyzed for litter and SOM. The largest biochemical changes were found in the sugar maple\uffe2\uff80\uff93basswood (SMBW) and black oak\uffe2\uff80\uff93white oak (BOWO) ecosystems. SMBW litter from the N addition treatment had less aromaticity, higher C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratios, and lower saturated carbon, lower carbonyl carbon, and higher carboxylates than controls; BOWO litter showed opposite trends, except for carbonyl and carboxylate contents. Litter from the sugar maple\uffe2\uff80\uff93red oak (SMRO) ecosystem had a lower C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio, but no change in DOC aromaticity. For SOM, the C\uffe2\uff80\uff83:\uffe2\uff80\uff83N ratio increased with N addition in SMBW and SMRO ecosystems, but decreased in BOWO; N addition did not affect the aromaticity of DOC extracted from mineral soil. All ecosystems showed increases in extractable DOC from both litter and soil in response to N treatment. The biochemical changes are consistent with the divergent microbial responses observed in these systems. Extracellular oxidative enzyme activity has declined in the BOWO and SMRO ecosystems while activity in the SMBW ecosystem, particularly in the litter horizon, has increased. In all systems, enzyme activities associated with the hydrolysis and oxidation of polysaccharides have increased. At the ecosystem scale, the biochemical characteristics of the dominant litter appear to modulate the effects of N deposition on organic matter dynamics.

", "keywords": ["Litter Chemistry", "Geology and Earth Sciences", "13. Climate action", "Soil Organic Matter", "Science", "Ecology and Evolutionary Biology", "0401 agriculture", " forestry", " and fisheries", "Nitrogen Deposition", "04 agricultural and veterinary sciences", "15. Life on land", "Dissolved Organic Matter", "Extracellular Enzyme Activity"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2486.2005.01001.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.1365-2486.2005.01001.x", "name": "item", "description": "10.1111/j.1365-2486.2005.01001.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2005.01001.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2005-07-19T00:00:00Z"}}, {"id": "10.1111/j.1365-2486.2012.02749.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:46Z", "type": "Journal Article", "created": "2012-05-24", "title": "Experimental Litterfall Manipulation Drives Large And Rapid Changes In Soil Carbon Cycling In A Wet Tropical Forest", "description": "Abstract

Global changes such as variations in plant net primary production are likely to drive shifts in leaf litterfall inputs to forest soils, but the effects of such changes on soil carbon (C) cycling and storage remain largely unknown, especially in C\uffe2\uff80\uff90rich tropical forest ecosystems. We initiated a leaf litterfall manipulation experiment in a tropical rain forest in Costa Rica to test the sensitivity of surface soil C pools and fluxes to different litter inputs. After only 2\uffc2\uffa0years of treatment, doubling litterfall inputs increased surface soil C concentrations by 31%, removing litter from the forest floor drove a 26% reduction over the same time period, and these changes in soil C concentrations were associated with variations in dissolved organic matter fluxes, fine root biomass, microbial biomass, soil moisture, and nutrient fluxes. However, the litter manipulations had only small effects on soil organic C (SOC) chemistry, suggesting that changes in C cycling, nutrient cycling, and microbial processes in response to litter manipulation reflect shifts in the quantity rather than quality of SOC. The manipulation also affected soil CO 2 fluxes; the relative decline in CO 2 production was greater in the litter removal plots (\uffe2\uff88\uff9222%) than the increase in the litter addition plots (+15%). Our analysis showed that variations in CO 2 fluxes were strongly correlated with microbial biomass pools, soil C and nitrogen (N) pools, soil inorganic P fluxes, dissolved organic C fluxes, and fine root biomass. Together, our data suggest that shifts in leaf litter inputs in response to localized human disturbances and global environmental change could have rapid and important consequences for belowground C storage and fluxes in tropical rain forests, and highlight differences between tropical and temperate ecosystems, where belowground C cycling responses to changes in litterfall are generally slower and more subtle.

", "keywords": ["2. Zero hunger", "soil biogeochemistry", "microbial biomass", "soil nitrogen", "carbon dioxide", "04 agricultural and veterinary sciences", "dissolved organic matter", "Biogeochemistry", "15. Life on land", "soil carbon chemistry", "root biomass", "13. Climate action", "soil phosphorus", "0401 agriculture", " forestry", " and fisheries", "net primary productivity"]}, "links": [{"href": "https://doi.org/10.1111/j.1365-2486.2012.02749.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.1365-2486.2012.02749.x", "name": "item", "description": "10.1111/j.1365-2486.2012.02749.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2012.02749.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-06-25T00:00:00Z"}}, {"id": "10.1111/j.1365-2486.2012.02794.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:46Z", "type": "Journal Article", "created": "2012-07-28", "title": "Acidity Controls On Dissolved Organic Carbon Mobility In Organic Soils", "description": "Abstract

Dissolved organic carbon (DOC) concentrations in surface waters have increased across much of Europe and North America, with implications for the terrestrial carbon balance, aquatic ecosystem functioning, water treatment costs and human health. Over the past decade, many hypotheses have been put forward to explain this phenomenon, from changing climate and land management to eutrophication and acid deposition. Resolution of this debate has been hindered by a reliance on correlative analyses of time series data, and a lack of robust experimental testing of proposed mechanisms. In a 4 year, four\uffe2\uff80\uff90site replicated field experiment involving both acidifying and deacidifying treatments, we tested the hypothesis that DOC leaching was previously suppressed by high levels of soil acidity in peat and organo\uffe2\uff80\uff90mineral soils, and therefore that observed DOC increases a consequence of decreasing soil acidity. We observed a consistent, positive relationship between DOC and acidity change at all sites. Responses were described by similar hyperbolic relationships between standardized changes in DOC and hydrogen ion concentrations at all sites, suggesting potentially general applicability. These relationships explained a substantial proportion of observed changes in peak DOC concentrations in nearby monitoring streams, and application to a UK\uffe2\uff80\uff90wide upland soil pH dataset suggests that recovery from acidification alone could have led to soil solution DOC increases in the range 46\uffe2\uff80\uff93126% by habitat type since 1978. Our findings raise the possibility that changing soil acidity may have wider impacts on ecosystem carbon balances. Decreasing sulphur deposition may be accelerating terrestrial carbon loss, and returning surface waters to a natural, high\uffe2\uff80\uff90DOC condition.

", "keywords": ["550", "15. Life on land", "dissolved organic carbon", "01 natural sciences", "6. Clean water", "13. Climate action", "peat", "podzol", "sulphur", "14. Life underwater", "soil carbon", "acidity", "organic soil", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://livrepository.liverpool.ac.uk/3160177/1/GCB%202012.pdf"}, {"href": "https://doi.org/10.1111/j.1365-2486.2012.02794.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.1365-2486.2012.02794.x", "name": "item", "description": "10.1111/j.1365-2486.2012.02794.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1365-2486.2012.02794.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2012-09-01T00:00:00Z"}}, {"id": "10.1111/j.1469-8137.2010.03613.x", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:18:49Z", "type": "Journal Article", "created": "2011-01-19", "title": "Drought Alters Carbon Fluxes In Alpine Snowbed Ecosystems Through Contrasting Impacts On Graminoids And Forbs", "description": "\u2022 Climate change is predicted to increase the frequency of drought events in alpine ecosystems with the potential to affect carbon turnover. \u2022 We removed intact turfs from a Nardus stricta alpine snowbed community and subjected half of them to two drought events of 8 d duration under controlled conditions. Leachate dissolved organic carbon (DOC) was measured throughout the 6 wk study period, and a (13)CO(2) pulse enabled quantification of fluxes of recent assimilate into shoots, roots and leachate and ecosystem CO(2) exchange. \u2022 The amount of DOC in leachate from droughted cores was 62% less than in controls. Drought reduced graminoid biomass, increased forb biomass, had no effect on bryophytes, and led to an overall decrease in total above-ground biomass compared with controls. Net CO(2) exchange, gross photosynthesis and the amount of (13)CO(2) fixed were all significantly less in droughted turfs. These turfs also retained proportionally more (13)C in shoots, allocated less (13)C to roots, and the amount of dissolved organic (13)C recovered in leachate was 57% less than in controls. \u2022 Our data show that drought events can have significant impacts on ecosystem carbon fluxes, and that the principal mechanism behind this is probably changes in the relative abundance of forbs and grasses.", "keywords": ["0106 biological sciences", "leachate", "Carbon Isotopes", "Nardus stricta", "04 agricultural and veterinary sciences", "Plants", "15. Life on land", "net CO2 exchange", "dissolved organic carbon", "01 natural sciences", "plant diversity", "Carbon", "6. Clean water", "Droughts", "climate change", "13. Climate action", "Snow", "13CO(2)", "0401 agriculture", " forestry", " and fisheries", "Biomass", "Organic Chemicals", "Ecosystem"]}, "links": [{"href": "https://doi.org/10.1111/j.1469-8137.2010.03613.x"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/New%20Phytologist", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1111/j.1469-8137.2010.03613.x", "name": "item", "description": "10.1111/j.1469-8137.2010.03613.x", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1111/j.1469-8137.2010.03613.x"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2011-01-19T00:00:00Z"}}, {"id": "10.3390/land12122143", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:20:49Z", "type": "Journal Article", "created": "2023-12-08", "title": "Ten-Year Impact of Cover Crops on Soil Organic Matter Quantity and Quality in Semi-Arid Vineyards", "description": "

Soil organic matter depletion is a significant concern in agricultural soils, impacting crucial aspects of ecosystem health, especially soil properties such as fertility and soil moisture retention. Adopting sustainable soil management practices, such as cover crops, can mitigate this issue. In this study, we analyzed the soil organic carbon (SOC) content and quality in vineyards using two distinct management methods: permanent spontaneous cover crops and conventional tillage. Dissolved organic carbon (DOC) was quantified and chemically characterized using UV\u2013visible spectroscopy. Our results showed an increase of 4.7 Mg C/ha in the carbon stock (50 cm depth) after 10 years of implementing vegetation covers compared with tilled soil. Additionally, cover crop management increased less humified soluble carbon in surface soil layers, while tillage transformed the solubilized carbon. This finding is important because tilled soil becomes more accessible to microbial degradation and leaching, which, in the long term, leads to a SOM content decrease. In conclusion, an increase in carbon stock was observed when using cover crops due to the incorporation of fresh organic matter, whereas tilled soils showed a depletion of carbon stock, including the mobilization of more stable carbon.

", "keywords": ["Carbon sequestration", "2. Zero hunger", "S", "Agriculture", "04 agricultural and veterinary sciences", "15. Life on land", "carbon sequestration", "dissolved organic carbon", "01 natural sciences", "13. Climate action", "0401 agriculture", " forestry", " and fisheries", "Geolog\u00eda", "groundcovers", "sustainable land management practice", "0105 earth and related environmental sciences"], "contacts": [{"organization": "Jim\u00e9nez Gonz\u00e1lez, Marco Antonio, L\u00f3pez-Romano, Hugo, Carral Gonz\u00e1lez, Pilar, \u00c1lvarez Gonz\u00e1lez, Ana Mar\u00eda, Herranz Luque, Juan Emilio, Sastre-Rodr\u00edguez, Blanca Esther, Garc\u00eda-D\u00edaz, Andr\u00e9s, Mu\u00f1oz-Organero, Gregorio, Marqu\u00e9s P\u00e9rez, Mar\u00eda Jos\u00e9,", "roles": ["creator"]}]}, "links": [{"href": "https://www.mdpi.com/2073-445X/12/12/2143/pdf"}, {"href": "https://doi.org/10.3390/land12122143"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Land", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/land12122143", "name": "item", "description": "10.3390/land12122143", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/land12122143"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-12-08T00:00:00Z"}}, {"id": "10.1594/pangaea.902194", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:19:37Z", "type": "Dataset", "title": "Silicon isotopes in Arctic and sub-Arctic glacial meltwaters", "description": "Open AccessSupplement to: Hatton, Jade Elizabeth; Hendry, Katharine R; Hawkings, Jonathan; Wadham, Jemma; Opfergelt, Sophie; Kohler, Tyler; Yde, Jacob; Stibal, Marek; \u017d\u00e1rsk\u00fd, Jakub (2019): Silicon isotopes in Arctic and sub-Arctic glacial meltwaters: the role of the subglacial weathering in the silicon cycle. Proceedings of the Royal Society A-Mathematical Physical and Engineering Sciences, 475(2228)", "keywords": ["Silicon", "water", "Isotope CYcling in the LABrador Sea (ICY-LAB)", "silicon particulate amorphous", "electrical", "Chloride", "Chloride anion", "Sodium cation", "Temperature", " water", "Sulfate anion", "Silicon", " particulate amorphous", "particulate amorphous", "silicon dissolved", "DATE TIME", "Bicarbonate ion", "Magnesium", "Isotope CYcling in the LABrador Sea ICY LAB", "Glacier", "Fluoride", "LONGITUDE", "Ratio", "Calcium cation", "Conductivity", "Potassium cation", "pH", "Multiple investigations", "Sodium", "Temperature", "Suspended particulate matter", "\u03b430Si", "\u03b430Si", " silicon dissolved", "Conductivity", " electrical", "Sulfate", "Bicarbonate", "DATE/TIME", "13. Climate action", "Earth System Research", "LATITUDE", "Potassium", "Calcium", "\u03b430Si", " silicon particulate amorphous", "Magnesium cation"], "contacts": [{"organization": "Hatton, Jade Elizabeth, Hendry, Katharine R, Hawkings, Jonathan, Wadham, Jemma, Opfergelt, Sophie, Kohler, Tyler, Yde, Jacob, Stibal, Marek, \u017d\u00e1rsk\u00fd, Jakub,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1594/pangaea.902194"}, {"rel": "self", "type": "application/geo+json", "title": "10.1594/pangaea.902194", "name": "item", "description": "10.1594/pangaea.902194", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1594/pangaea.902194"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-01-01T00:00:00Z"}}, {"id": "10.1594/pangaea.963212", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:19:37Z", "type": "Dataset", "title": "Stream water chemistry and landscape characteristics in Zackenberg Valley, NE Greenland summer 2021", "description": "The data contains water chemistry and spectral catchment NDVI for 14 streams in Zackenberg Valley in Northeast Greenland, sampled summer 2021 from 10th July to 15th September. We collected water samples for measuring water chemistry, and we determined landscape parameters using GIS based tools. The data was collected at three sampling periods in summer 2021 in the Zackenberg Research Station (74\u00b028'N, 20\u00b034'W). The area has a polar tundra climate with mean annual air temperature of -9.1 \u00b0C. Water chemistry (i.e. dissolved and particulate nitrogen, phosphorus, carbon; dissolved iron and silicate) and catchment characteristics (i.e. catchment area, altitude, slope, aspect, NDVI, snow cover) was measured for each of the 14 stream sites. Water chemistry samples were collected and analyzed using standard methods, and landscape characteristics were determined using GIS resources. The data was collected in order to study relationships between landscape characteristics and stream water chemistry. The water samples were collected by a team of two people, and the detailed methods are given below.", "keywords": ["inorganic", "median", "Nitrate Nitrogen", "Nitrogen", " inorganic", " dissolved/Nitrogen", " total dissolved ratio", "Nitrate", "Normalized Difference Vegetation Index", "Latitude of event", "Inductively Coupled Plasma Mass Spectrometry ICP MS", "Arctic", "Temperature", " water", "WTW", "Total organic carbon analyzer TOC VCPH TNM 1", "Total organic carbon analyzer (TOC-VCPH/TNM-1)", " Shimadzu", "Calculated", "dissolved ratio", "Nitrate/Nitrogen", " inorganic", " dissolved ratio", "total dissolved ratio", "Multiple investigations", "Temperature", "Nitrogen", " total dissolved", "Month", "dissolved", "specific", "streams", "6. Clean water", "Nitrogen", " inorganic", " dissolved", "Chemistry", "Inductively Coupled Plasma - Mass Spectrometry (ICP-MS)", " PerkinElmer Instruments", " Optima 2000 DV", "Sum cations", "Natural Sciences", "Ammonium", "Potassium Silicon ratio", "Calcium Magnesium ratio", "Conductivity Meter", " WTW", " ProfiLine Cond 3110", "Longitude of event", "Silicon", "Lachat QuickChem 8500 flow injection autoanalyser", "Nitrogen", "organic", "water chemistry", "Iron", "Calcium/Magnesium ratio", "water", "Site", "Nitrate/Ammonium ratio", "Aspect", "Normalized Differenced Vegetation Index", " median", "Ammonium Nitrogen", "Normalized Differenced Vegetation Index", "Catchment area", "Slope", "PerkinElmer Instruments", "ProfiLine Cond 3110", "Shimadzu", "Date/Time of event", "Conductivity Meter", "Nitrate Ammonium ratio", "total dissolved", "Conductivity", "Event label", "Date Time of event", "Nitrogen", " inorganic", " dissolved/Nitrogen", " organic", " dissolved ratio", "15. Life on land", "Carbon", " organic", " dissolved", "dissolved Nitrogen", "Elevation of event", "Carbon", "rivers", "Snow coverage", "Greening", "Potassium/Silicon ratio", "Optima 2000 DV", "Nitrogen", " organic", " dissolved", "13. Climate action", "Discharge", "Conductivity", " specific", "Ammonium/Nitrogen", " inorganic", " dissolved ratio"], "contacts": [{"organization": "Riis, Tenna, Tank, Jennifer, Holmboe, Cecilie Marie Hartvig, Gim\u00e9nez-Grau, Pau, Mastepanov, Mikhail, Catalan, Nuria, Stott, David, Hansen, Birgitte, Kristiansen, S\u00f8ren M, Pastor, Ada,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.1594/pangaea.963212"}, {"rel": "self", "type": "application/geo+json", "title": "10.1594/pangaea.963212", "name": "item", "description": "10.1594/pangaea.963212", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1594/pangaea.963212"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2023-01-01T00:00:00Z"}}, {"id": "10.5061/dryad.73n5tb2v6", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:22Z", "type": "Dataset", "title": "Soil dissolved organic carbon in terrestrial ecosystems: global budget, spatial distribution and controls", "description": "unspecifiedThe data for DOC concentrations were collected from the publications by searching \u201csoil DOC\u201d in Google Scholar and the Web of Science. The data points were derived from tables containing soil DOC or extracted by the Engauge Digitizer software (Version 4.1) from figures in collected publications. The data points with reported soil DOC concentrations greater than total organic C (TOC) concentration were excluded from the database. In total, 3869 data points were retrieved from 107 papers published during 1981 - 2019.", "keywords": ["2. Zero hunger", "Terrestrial ecosystems", "biomes", "13. Climate action", "15. Life on land", "environmental control", "dissolved organic carbon"], "contacts": [{"organization": "Xu, Xiaofeng, Guo, Ziyu, Wang, Yihui, Wan, Zhongmei,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.73n5tb2v6"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.73n5tb2v6", "name": "item", "description": "10.5061/dryad.73n5tb2v6", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.73n5tb2v6"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-18T00:00:00Z"}}, {"id": "10.5061/dryad.c2fqz61cf", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:25Z", "type": "Dataset", "title": "Oxygen availability regulates the quality of soil dissolved organic matter by mediating microbial metabolism and iron oxidation", "description": "Dissolved organic matter (DOM) plays a vital role in biogeochemical processes and in determining the responses of soil organic matter (SOM) to global change. Although the quantity of soil DOM has been inventoried across diverse spatio-temporal scales, the underlying mechanisms accounting for variability in DOM dynamics remain unclear, especially in upland ecosystems. Here, a gradient of SOM storage across twelve croplands in northeast China was used to understand links between DOM dynamics, microbial metabolism, and abiotic conditions. We assessed the composition, biodegradability and key biodegradable components of DOM. In addition, SOM and mineral-associated organic matter (MAOM) composition, soil enzyme activities, oxygen availability, soil texture, iron (Fe), Fe-bound organic matter and nutrient concentrations were quantified to clarify the drivers of DOM quality (composition and biodegradability). The proportion of biodegradable DOM increased exponentially with decreasing initial DOM concentration due to larger fractions of depolymerized DOM that was rich in small-molecular phenols and proteinaceous components. Unexpectedly, the composition of DOM was decoupled from that of SOM or MAOM, but significantly related to enzymatic properties. These results indicate that microbial metabolism exhibited a dominant role in DOM generation. As DOM concentration declined, increased soil oxygen availability regulated DOM composition and enhanced its biodegradability mainly through mediating microbial metabolism and Fe oxidation. The oxygen-induced oxidation of Fe(II) to Fe(III) removed complex DOM compounds with large molecular weight. Moreover, increased oxygen availability stimulated oxidase-catalyzed depolymerization of aromatic substances, and promoted production of protein-like DOM components due to lower enzymatic C/N acquisition ratio. As global changes in temperature and moisture will have large impacts on soil oxygen availability, the role of oxygen in regulating DOM dynamics highlights the importance of integrating soil oxygen supply with microbial metabolism and Fe redox status to improve model predictions of soil carbon under climate change.", "keywords": ["2. Zero hunger", "soil organic carbon", "iron cycling", "13. Climate action", "FOS: Agricultural sciences", "Biodegradation", "oxygen availability", "enzymatic stoichiometry", "15. Life on land", "dissolved organic matter", "6. Clean water"], "contacts": [{"organization": "Li, Ye, Chen, Zengming, Chen, Ji, Castellano, Michael J., Ye, Chenglong, Zhang, Nan, Miao, Yuncai, Zheng, Huijie, Li, Junjie, Ding, Weixin,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.c2fqz61cf"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.c2fqz61cf", "name": "item", "description": "10.5061/dryad.c2fqz61cf", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.c2fqz61cf"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2022-10-23T00:00:00Z"}}, {"id": "10.5194/bg-22-601-2025", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:40Z", "type": "Journal Article", "created": "2025-01-31", "title": "Contrasting seasonal patterns in particle aggregation and dissolved organic matter transformation in a sub-Arctic fjord", "description": "

Abstract. Particulate (POM) and dissolved (DOM) organic matter in the ocean are important components of the Earth's biogeochemical cycle. The two are in a constant state of dynamic change as a result of physical and biochemical processes; however, they are mostly treated as two distinct entities, separated operationally by a filter. We studied the seasonal transition of DOM and POM pools and their drivers in a sub-Arctic fjord by means of monthly environmental sampling and by performing experiments at selected time points. For the experiments, surface water (5\u2009m) was either pre-filtered through a GF/F filter (0.7\u2009\u00b5m) or left unfiltered, followed by 36\u2009h incubations. Before and after incubation, samples were collected for dissolved and particulate organic carbon concentrations (DOC, POC), extracellular polymeric substances (EPSs), microbial community (flow cytometry), and molecular composition of DOM (high-performance liquid chromatography coupled to high-resolution mass spectrometry \u2013 HPLC-HRMS). During the biologically productive period, when environmental POC concentrations were high (April, June, September), the filtered water showed an increase in POC concentrations. While POC concentrations increased in September, DOM lability decreased based on changes in the average hydrogen saturation and aromaticity of DOM molecules. In contrast, during the winter period (December and February), when environmental POC concentrations were low, lower concentrations of POC were measured at the end of the experiments compared to at the start. The change in POC concentrations was significantly different between the biologically productive period and the winter period (t test; p<0.05). Simultaneously, the DOM pool became more labile during the incubation period, as indicated by changes in the average hydrogen saturation, aromaticity, and oxygen saturation, with implications for carbon cycling. The change in POC was not directly associated with an antagonistic change in DOC concentrations, highlighting the complexity of organic matter transformations, making the dynamics between POC and DOC difficult to quantify. However, in both periods, bacterial activity and EPS concentrations increased throughout the incubations, showing that bacterial degradation and physical DOM aggregation drive the transformations of POM and DOM in concert but at varying degrees under different environmental conditions.

", "keywords": ["particulate organic carbon", "seasonal variation", "QE1-996.5", "Ecology", "saturation", "aggregation", "surface water", "fjord", "Geology", "biogeochemical cycle", "Milj\u00f6vetenskap", "dissolved organic carbon", "microbial activity", "environmental conditions", "Life", "QH501-531", "microbial community", "Environmental Sciences", "QH540-549.5"], "contacts": [{"organization": "Maria G. Digernes, Yasemin V. Bodur, Mart\u00ed Amargant-Arum\u00ed, Oliver M\u00fcller, Jeffrey A. Hawkes, Stephen G. Kohler, Ulrike Dietrich, Marit Reigstad, Maria L. Paulsen,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5194/bg-22-601-2025"}, {"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-22-601-2025", "name": "item", "description": "10.5194/bg-22-601-2025", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/bg-22-601-2025"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-01-31T00:00:00Z"}}, {"id": "10.3390/d13090408", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:20:44Z", "type": "Journal Article", "created": "2021-08-27", "title": "Soil Microbial Community Based on PLFA Profiles in an Age Sequence of Pomegranate Plantation in the Middle Yellow River Floodplain", "description": "

Pomegranate (Punica granatum L.) is one of the most important fruit trees in semi-arid land. Previous studies were primarily focused on soil microbial community composition under different pomegranate plantation managements. However, soil microbial community composition under long-term pomegranate plantation has rarely been studied. We investigated pomegranate plantation along with an age sequence (i.e., 1, 3, 5, and 10 years after pomegranate plantation; abbreviated by P1, P3, P5, P10, respectively) in the Middle Yellow River floodplain. Our objectives were to address (1) variations of soil physicochemical properties and (2) changes in soil microbial community composition and the influential factors. The results demonstrated that the soil water content of pomegranate plantation decreased with the increase of pomegranate plantation stand age. Specifically, dissolved organic carbon, ammonium, and available phosphorus increased significantly with stand age both at 0\u201310- and 10\u201320-cm soil depths. The P10 had the highest microbial phospholipid fatty acid (PLFA) profiles, including fungi, bacteria, Gram-positive bacteria, Gram-negative bacteria, and arbuscular mycorrhizal fungi. The ratio of fungal PLFAs to bacterial PLFAs increased and the ratio of Gram-positive to Gram-negative bacterial PLFAs decreased along the pomegranate plantation stand age. Dissolved organic carbon was the most important influential factor among the studied variables, which explained 42.2% variation of soil microbial community. In summary, the long-term plantation of pomegranate elevated soil microbial biomass and altered microbial community composition.

", "keywords": ["2. Zero hunger", "Bacteria", "QH301-705.5", "plant stand age", "Fungi", "04 agricultural and veterinary sciences", "Yellow River", "15. Life on land", "dissolved organic carbon", "available phosphorus", "Plant stand age", "pomegranate plantation", "Available phosphorus", "0401 agriculture", " forestry", " and fisheries", "fungi", "Dissolved organic carbon", "Pomegranate plantation", "Biology (General)", "bacteria"]}, "links": [{"href": "http://www.mdpi.com/1424-2818/13/9/408/pdf"}, {"href": "https://doi.org/10.3390/d13090408"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Diversity", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/d13090408", "name": "item", "description": "10.3390/d13090408", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/d13090408"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-27T00:00:00Z"}}, {"id": "10.3390/w10101457", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:02Z", "type": "Journal Article", "created": "2018-10-16", "title": "Removal of Natural Organic Matter and Organic Micropollutants during Riverbank Filtration in Krajkowo, Poland", "description": "

The aim of this article is to evaluate the removal of natural organic matter and micropollutants at a riverbank filtration site in Krajkowo, Poland, and its dependence on the distance between the wells and the river and related travel times. A high reduction in dissolved organic carbon (40\uffe2\uff80\uff9342%), chemical oxygen demand (65\uffe2\uff80\uff9370%), and colour (42\uffe2\uff80\uff9347%) was found in the riverbank filtration wells at a distance of 60\uffe2\uff80\uff9380 m from the river. A lower reduction in dissolved organic carbon (26%), chemical oxygen demand (42%), and colour (33%) was observed in a horizontal well. At greater distances of the wells from the river, the removal of pharmaceutical residues and pesticides was in the range of 52\uffe2\uff80\uff9366% and 55\uffe2\uff80\uff9366%, respectively. The highest removal of pharmaceutical residues and pesticides was found in a well located 250 m from the river and no micropollutants were detected in a well located 680 m from the river. The results provide evidence of the high efficacy of riverbank filtration for contaminant removal.

", "keywords": ["riverbank filtration", "removal efficacy", "13. Climate action", "pharmaceutical residues", "0208 environmental biotechnology", "0207 environmental engineering", "dissolved organic carbon (DOC)", "pesticides", "02 engineering and technology", "6. Clean water"]}, "links": [{"href": "http://www.mdpi.com/2073-4441/10/10/1457/pdf"}, {"href": "https://doi.org/10.3390/w10101457"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Water", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/w10101457", "name": "item", "description": "10.3390/w10101457", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/w10101457"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-10-16T00:00:00Z"}}, {"id": "10.3390/w12061722", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:02Z", "type": "Journal Article", "created": "2020-06-18", "title": "Influence of Dissolved Organic Matter Sources on In-Stream Net Dissolved Organic Carbon Uptake in a Mediterranean Stream", "description": "

Studies exploring how different sources of dissolved organic matter (DOM) influence in-stream dissolved organic carbon (DOC) uptake at the ecosystem scale are scarce in the literature. To fill this knowledge gap, we examined the relationship between DOM sources and in-stream net DOC uptake (UDOC) in a sub-humid Mediterranean stream. We considered four reach-scale scenarios occurring under natural conditions that differed in predominant DOM sources (groundwater, leaf litter, and/or upstream water). Results showed that groundwater inputs favored in-stream net DOC uptake, while leaf litter inputs promoted in-stream net DOC release. However, there was no clear effect of DOM source mixing on the magnitude of UDOC. Further, the variability in UDOC within and among scenarios was mostly explained by stream DOC concentration, suggesting that DOC availability limits microbial activity in this stream. DOM composition became a controlling factor of UDOC variability only during the leaf litter period, when stream DOC concentration was the highest. Together, these results suggest that the capacity of headwater forested streams to process DOC is closely tied to the availability of different DOM sources and how they vary over time and along the river network.

", "keywords": ["[SDU.OCEAN]Sciences of the Universe [physics]/Ocean", "leaf litter", "carbon availability", "Atmosphere", "[SDU.OCEAN] Sciences of the Universe [physics]/Ocean", " Atmosphere", "577", "Leaf litter", "910", "15. Life on land", "dissolved organic carbon", "01 natural sciences", "[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces", " environment", "6. Clean water", "Dissolved organic matter composition", "groundwater inputs", "13. Climate action", "Groundwater inputs", "dissolved organic matter composition", "In-stream net uptake", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", "Dissolved organic carbon", "environment", "in-stream net uptake", "Carbon availability", "0105 earth and related environmental sciences"]}, "links": [{"href": "http://www.mdpi.com/2073-4441/12/6/1722/pdf"}, {"href": "https://www.mdpi.com/2073-4441/12/6/1722/pdf"}, {"href": "https://doi.org/10.3390/w12061722"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Water", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.3390/w12061722", "name": "item", "description": "10.3390/w12061722", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.3390/w12061722"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-06-17T00:00:00Z"}}, {"id": "10261/377128", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:41Z", "type": "Journal Article", "created": "2021-08-07", "title": "Groundwater antibiotic pollution and its relationship with dissolved organic matter: Identification and environmental implications", "description": "The occurrence of veterinary antibiotics and hydro-chemical parameters in eleven natural springs in a livestock production area is evaluated, jointly with the characterization of their DOM fingerprint by Orbitrap HRMS. Tetracycline and sulfonamide antibiotics were ubiquitous in all sites, and they were detected at low ng L-1 concentrations, except for doxycycline, that was present at \u03bcg L-1 in one location. DOM analysis revealed that most molecular formulas were CHO compounds (49 %-68\u00a0%), with a remarkable percentage containing nitrogen and sulphur (16 %-23\u00a0% and 11 %-24\u00a0%, respectively). Major DOM components were phenolic and highly unsaturated compounds (~90\u00a0%), typical for soil-derived organic matter, while approximately 11\u00a0% were unsaturated aliphatic, suggesting that springs may be susceptible to anthropogenic contamination sources. Comparing the DOM fingerprint among sites, the spring showing the most different profile was the one with surface water interaction and characterized by having lower CHO and higher CHOS formulas and aliphatic compounds. Correlations between antibiotics and DOM showed that tetracyclines positively correlate with unsaturated oxygen-rich substances, while sulfonamides relate with aliphatic and unsaturated oxygen-poor compounds. This indicates that the fate of different antibiotics will be controlled by the type of DOM present in groundwater.", "keywords": ["High-resolution mass spectrometry", "550", "Contaminants emergents en l'aigua", "Antibi\u00f2tics", "02 engineering and technology", "01 natural sciences", "630", "Soil", "Antibiotics", "Co-transport", "Groundwater -- Pollution", "Dissolved organic matter", "Groundwater", "0105 earth and related environmental sciences", "2. Zero hunger", "[SDU.OCEAN]Sciences of the Universe [physics]/Ocean", "Emerging contaminants in water", "Atmosphere", "[SDU.OCEAN] Sciences of the Universe [physics]/Ocean", " Atmosphere", "[SDU.ENVI] Sciences of the Universe [physics]/Continental interfaces", " environment", "6. Clean water", "Anti-Bacterial Agents", "Water quality", "13. Climate action", "Aig\u00fces subterr\u00e0nies -- Contaminaci\u00f3", "[SDU.ENVI]Sciences of the Universe [physics]/Continental interfaces", "0210 nano-technology", "environment", "Water Pollutants", " Chemical", "Environmental Monitoring"]}, "links": [{"href": "https://doi.org/10261/377128"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Environmental%20Pollution", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10261/377128", "name": "item", "description": "10261/377128", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/377128"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-11-01T00:00:00Z"}}, {"id": "10261/383825", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:24:41Z", "type": "Dataset", "title": "[Dataset] Decreasing Photoreactivity and Concurrent Change in Dissolved Organic Matter Composition With Increasing Inland Water Residence Time", "description": "Open AccessPeer reviewed", "keywords": ["Ensure availability and sustainable management of water and sanitation for all", "Ensure sustainable consumption and production patterns", "Make cities and human settlements inclusive", " safe", " resilient and sustainable", "Dissolved organic matter quality", "Photodegradation", "Water retention time", "http://metadata.un.org/sdg/6", "Aquatic continuum", "http://metadata.un.org/sdg/3", "http://metadata.un.org/sdg/11", "Ensure healthy lives and promote well-being for all at all ages", "Apparent quantum yield"], "contacts": [{"organization": "Grasset, C., Einarsdottir, K., Catal\u00e1n, N., Tranvik, L. J., Groeneveld, M., Hawkes, J. A., Attermeyer, Katrin,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10261/383825"}, {"rel": "self", "type": "application/geo+json", "title": "10261/383825", "name": "item", "description": "10261/383825", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10261/383825"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-01-01T00:00:00Z"}}, {"id": "10.34894/XK4LSU", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:04Z", "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": "10.5061/dryad.0p2ngf1xb", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:19Z", "type": "Dataset", "title": "Data from: Leaching losses of dissolved organic carbon and nitrogen from agricultural soils in the upper US Midwest", "description": "unspecifiedreadme files are given that describe the data table", "keywords": ["2. Zero hunger", "corn", "grass", "Biofuel", "nitrate", "15. Life on land", "dissolved organic matter", "7. Clean energy", "6. Clean water"], "contacts": [{"organization": "Hussain, Mir Zaman, Robertson, G.Philip, Basso, Bruno, Hamilton, Stephen K.,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.0p2ngf1xb"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.0p2ngf1xb", "name": "item", "description": "10.5061/dryad.0p2ngf1xb", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.0p2ngf1xb"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2020-05-28T00:00:00Z"}}, {"id": "10.5061/dryad.3bk3j9kj4", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:20Z", "type": "Dataset", "title": "Precipitation regime controls bryosphere carbon cycling similarly across contrasting ecosystems", "description": "In arctic and boreal ecosystems, ground bryophytes play an important role in regulating carbon (C) exchange between vast belowground C stores and the atmosphere. Climate is changing particularly fast in these high-latitude regions, but it is unclear how altered precipitation regimes will affect C dynamics in the bryosphere (i.e., the ground moss layer including senesced moss, litter, and associated biota) and the closely associated upper humus layer, and how these effects will vary across contrasting environmental conditions. Here, we set up a greenhouse experiment in which mesocosms were assembled containing samples of the bryosphere, dominated by the feather moss Hylocomium splendens, and the upper humus layer, that were collected from across a boreal forest chronosequence in northern Sweden which varies strongly in nutrient availability, productivity, and soil biota. We tested the effect of variation in precipitation volume and frequency on CO2 exchange and dissolved organic carbon (DOC) export, and on moss growth. As expected, reduced precipitation volume and frequency lowered net CO2 efflux, DOC export, and moss growth. However, by regulating moisture, the lower bryosphere and humus layers often mediated how precipitation volume and frequency interacted to drive C dynamics. For example, less frequent precipitation reduced moss growth only when precipitation volume was low. When volume was high, high moisture content of the humus layer helped avoid moss desiccation. Variation in precipitation regime affected C cycling consistently in samples collected across the chronosequence, despite large environmental variation along the sequence. This suggests that the bryosphere exerts a strong buffering effect on environmental variation at the forest floor, which leads to similar responses of C cycling to external perturbations across highly contrasting ecosystems. As such, our study indicates that projected increases in droughts and ground evapotranspiration in high-latitude regions resulting from climate change will consistently reduce C losses from moss-dominated ecosystems.", "keywords": ["context-dependency", "13. Climate action", "net ecosystem exchange", "15. Life on land", "dissolved organic carbon", "moss"], "contacts": [{"organization": "Grau-Andr\u00e9s, Roger, Wardle, David, Nilsson, Marie-Charlotte, Kardol, Paul,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.3bk3j9kj4"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.3bk3j9kj4", "name": "item", "description": "10.5061/dryad.3bk3j9kj4", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.3bk3j9kj4"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-01-12T00:00:00Z"}}, {"id": "10.5061/dryad.k6djh9wdx", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:28Z", "type": "Dataset", "created": "2024-01-30", "title": "Fluxes and concentrations of dissolved organic carbon in soils", "description": "unspecifiedThe data were compiled from data in our study and those from published sources by searching for \u201cdissolved organic carbon\u201d, \u201csolute\u201d, \u201cflux\u201d, \u201cleaching\u201d, and \u201csoil\u201d in Google Scholar. We compiled the data of DOC fluxes in throughfall and soil profiles from 91 sites, of which the DOC flux data at 18 sites have been published by our group. The climate was classified into four groups [polar climate (MAT < 0 \u00baC), boreal climate (0 \u00baC < MAT < 6 \u00baC), temperate climate (6 \u00baC < MAT < 20 \u00baC), tropical climate (20 \u00baC < MAT)], based on mean annual air temperature. The other parameters include climatic properties [mean annual precipitation and mean annual air temperature], plant litter properties [litterfall C input, C/N ratio, Klason-lignin (residue after digestion with sulfuric acid; Allen et al., 1974), lignin/N ratio, root litter production] and soil properties [soil C stocks (O horizon and mineral soil (0-30 cm depth)), pH (water extraction), clay content, short-range-order (amorphous) aluminum (Al), iron (Fe) (acid ammonium oxalate extractable Al and Fe; McKeague and Day, 1966)]. The sampling and analytical methods are concisely summarized as follows: Throughfall (canopy leaching) samples were collected by precipitation collector, while soil solution samples were collected using tension-free lysimeters for downward flux of water percolating in the soil profiles. Sample solutions were filtered through a 0.45 \u00b5m filter (e.g., PTFE syringe filter) and stored at 1\u00b0C in the dark prior to analyses. The concentrations of DOC were determined using a total organic carbon and nitrogen analyzer (TOC-VCSH, Shimadzu, Japan). The dissolved organic nitrogen (DON) concentrations were calculated by subtracting dissolved inorganic nitrogen (sum of NH4+ and NO3-) from TDN concentrations (DON = TDN - NH4+ - NO3-) to obtain DOC/DON ratios in soil solution. The DOC flux at the depth of 0 cm (the bottom of organic layers) and the bottom of B horizon (the bottom of rooting zone) was estimated by multiplying DOC concentrations in soil solution and water fluxes at each depth. Soil water fluxes were estimated by hydrological models or precipitation-evapotranspiration water budgets. Annual root production was measured by ingrowth core method, net sheet method, or sequential sampling method and estimated to be equal to annual root litter inputs. Proportion of DOC flux from the O horizon relative to C input via both throughfall and litterfall was calculated by dividing DOC flux from the O horizon by C input via both throughfall and litterfall. DOC retention in the mineral soil was calculated as the percentage of net decrease in DOC flux between O and B horizons relative to DOC flux from the O horizon. The apparent turnover time (yr) of soil C was estimated by dividing soil C stocks (Mg C ha\u20131) by C inputs (net DOC inputs and root litter inputs into the mineral soil) (Mg C ha\u20131 yr\u20131).", "keywords": ["tropical forest", "FOS: Earth and related environmental sciences", "Soil pH", "dissolved organic carbon", "dissolved organic nitrogen"], "contacts": [{"organization": "Fujii, Kazumichi", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5061/dryad.k6djh9wdx"}, {"rel": "self", "type": "application/geo+json", "title": "10.5061/dryad.k6djh9wdx", "name": "item", "description": "10.5061/dryad.k6djh9wdx", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5061/dryad.k6djh9wdx"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2024-02-19T00:00:00Z"}}, {"id": "10.5194/bg-16-1305-2019", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:38Z", "type": "Journal Article", "created": "2018-04-26", "title": "Distribution of Fe isotopes in particles and colloids in the salinity gradient along the Lena River plume, Laptev Sea", "description": "

Abstract. Riverine Fe input is the primary Fe source to the ocean. This study is focused on the distribution of Fe along the Lena River freshwater plume in the Laptev Sea using samples from a 600\u2009km long transect in front of the Lena River mouth. Separation of the particulate (>\u20090.22\u2009\u00b5m), colloidal (0.22\u2009\u00b5m\u20131\u2009kDa), and truly dissolved (\u200999\u2009% of particulate Fe and about 90\u2009% of the colloidal Fe was observed across the shelf, while the truly dissolved phase was almost constant across the Laptev Sea. Thus, the truly dissolved Fe could be an important source of bioavailable Fe for plankton in the central Arctic Ocean, together with the colloidal Fe. Fe-isotope analysis showed that the particulate phase and the sediment below the Lena River freshwater plume had negative \u03b456Fe values (relative to IRMM-14). The colloidal Fe phase showed negative \u03b456Fe values close to the river mouth (about \u22120.20\u2009\u2030) and positive \u03b456Fe values in the outermost stations (about +0.10\u2009\u2030). We suggest that the shelf zone acts as a sink for Fe particles and colloids with negative \u03b456Fe values, representing chemically reactive ferrihydrites. While the positive \u03b456Fe values of the colloidal phase within the outer Lena River freshwater plume, might represent Fe-oxyhydroxides, which remain in the water column, and will be the predominant \u03b456Fe composition in the Arctic Ocean.

", "keywords": ["particles", "QE1-996.5", "Ecology", "truly dissolved iron", "Geology", "Geokemi", "Lena River Plume", "iron isotopes", "01 natural sciences", "estuarine mixing", "6. Clean water", "Geovetenskap och relaterad milj\u00f6vetenskap", "Geochemistry", "iron particles", "Life", "colloids", "13. Climate action", "QH501-531", "Laptev Sea", "Fe isotopes", "14. Life underwater", "Earth and Related Environmental Sciences", "QH540-549.5", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://bg.copernicus.org/articles/16/1305/2019/bg-16-1305-2019.pdf"}, {"href": "https://doi.org/10.5194/bg-16-1305-2019"}, {"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-16-1305-2019", "name": "item", "description": "10.5194/bg-16-1305-2019", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/bg-16-1305-2019"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-26T00:00:00Z"}}, {"id": "10.5194/bg-2018-181", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:21:39Z", "type": "Journal Article", "created": "2018-04-26", "title": "Distribution of Fe isotopes in particles and colloids in the salinity gradient along the Lena River plume, Laptev Sea", "description": "

Abstract. Riverine Fe input is the primary Fe source to the ocean. This study is focused on the distribution of Fe along the Lena River freshwater plume in the Laptev Sea using samples from a 600\u2009km long transect in front of the Lena River mouth. Separation of the particulate (>\u20090.22\u2009\u00b5m), colloidal (0.22\u2009\u00b5m\u20131\u2009kDa), and truly dissolved (\u200999\u2009% of particulate Fe and about 90\u2009% of the colloidal Fe was observed across the shelf, while the truly dissolved phase was almost constant across the Laptev Sea. Thus, the truly dissolved Fe could be an important source of bioavailable Fe for plankton in the central Arctic Ocean, together with the colloidal Fe. Fe-isotope analysis showed that the particulate phase and the sediment below the Lena River freshwater plume had negative \u03b456Fe values (relative to IRMM-14). The colloidal Fe phase showed negative \u03b456Fe values close to the river mouth (about \u22120.20\u2009\u2030) and positive \u03b456Fe values in the outermost stations (about +0.10\u2009\u2030). We suggest that the shelf zone acts as a sink for Fe particles and colloids with negative \u03b456Fe values, representing chemically reactive ferrihydrites. While the positive \u03b456Fe values of the colloidal phase within the outer Lena River freshwater plume, might represent Fe-oxyhydroxides, which remain in the water column, and will be the predominant \u03b456Fe composition in the Arctic Ocean.

", "keywords": ["particles", "QE1-996.5", "Ecology", "truly dissolved iron", "Geology", "Geokemi", "Lena River Plume", "iron isotopes", "01 natural sciences", "estuarine mixing", "6. Clean water", "Geovetenskap och relaterad milj\u00f6vetenskap", "Geochemistry", "iron particles", "Life", "colloids", "13. Climate action", "QH501-531", "Laptev Sea", "Fe isotopes", "14. Life underwater", "Earth and Related Environmental Sciences", "QH540-549.5", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://bg.copernicus.org/articles/16/1305/2019/bg-16-1305-2019.pdf"}, {"href": "https://doi.org/10.5194/bg-2018-181"}, {"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-2018-181", "name": "item", "description": "10.5194/bg-2018-181", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5194/bg-2018-181"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-26T00:00:00Z"}}, {"id": "10.5281/zenodo.1211769", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:22:16Z", "type": "Dataset", "title": "A global distribution of dissolved organic carbon in soil and in leaching - (database)", "description": "Current global carbon (C) models are not representing the fraction of C which is displaced along the terrestrial aquatic continuum thus overestimating the land sink capacity. In order to obtain more reliable C budgets, we need to integrate the lateral transfers of C from terrestrial ecosystems through the inland water network down to the oceans, including biogeochemical transformation during transport and C exchange with the atmosphere.Representing the production and cycling of dissolved organic C (DOC) in the soil column and the leaching of DOC into the inland water network is a first major step in this development. In this study we used newly developed model JULES-DOCM to obtain the first global estimate of global soil DOC stock and DOC concentration, DOC concentration in runoff and DOC leaching flux. In this dataset model produced files are stored as netcdf files including soil DOC stocks (at Top (0-35 cm) and Total soil (0-300cm), soil DOC concentration (at Top (0-35 cm) and Bottom ( 35-300cm)), DOC leaching flux (averaged over 1980-2010) and DOC concentration in runoff (averaged over 1980-2010). The measured DOC collected database is enclosed as the Excel file.", "keywords": ["13. Climate action", "15. Life on land", "Dissolved organic carbon", "DOC leaching"], "contacts": [{"organization": "Nakhavali, Mahdi", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.1211769"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.1211769", "name": "item", "description": "10.5281/zenodo.1211769", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.1211769"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-03T00:00:00Z"}}, {"id": "10.5281/zenodo.14438980", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:22:40Z", "type": "Dataset", "title": "Supporting data: Temporary waterlogging alters CO2 flux dynamics but not cumulative emissions in cultivated mineral soils", "description": "Data for publication: Kronberg et al. Temporary waterlogging alters CO2 flux dynamics but not cumulative emissions in cultivated mineral soils.\u00a0 The manuscript has been submitted to Biogeosciences (EGUSPHERE) with an identifier egusphere-2025-2801. The reader is referred to the above article for the detailed methodology of data collection. The data was collected from a soil monolith experiment conducted at University of Helsinki greenhouse facilities in 2021-2022. The experimental procedure has been described in detail in Kronberg et al. (2024). Kronberg, R., Kanerva, S., Koskinen, M., Polvinen, T., Heinonsalo, J., & Pihlatie, M. (2024). Controlled soil monolith experiment for studying the effects of waterlogging on redox processes. Geoderma, 452, 117110. https://doi.org/10.1016/j.geoderma.2024.117110 \u00a0 Methods: Soil temperature (T) and soil volumetric water content (SVWC) were measured with Teros12 sensors (METER Group, USA). CO2 and CH4 fluxes were measured with a non-dispersive infrared gas analyzer (Li 850, Li-cor Environment, USA) and laser spectroscopy-based gas analyzer (LGR N2OM1-919, ABB Group, Switzerland), respectively. Pore water dissolved carbon concentrations (DC, DOC, DIC) were measured with combustion catalytic oxidation method (TOC-L, Shimadzu, Japan). Porewater dissolved Fe concentration was measured colorimetrically with a 1,10-phenantroline method.", "keywords": ["dissolved carbon", "greenhouse gas", "CO2", "soil respiration", "dissolved organic carbon", "agriculture", "soil"], "contacts": [{"organization": "Kronberg, Reija Anna Marjatta, Koskinen, Markku, Polvinen, Tatu, Leinonen, Lisa, Viinikainen, Anne, Pihlatie, Mari,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/10.5281/zenodo.14438980"}, {"rel": "self", "type": "application/geo+json", "title": "10.5281/zenodo.14438980", "name": "item", "description": "10.5281/zenodo.14438980", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.5281/zenodo.14438980"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2025-06-19T00:00:00Z"}}, {"id": "10.5281/zenodo.14563816", "type": "Feature", "geometry": null, "properties": {"updated": "2026-07-26T16:22:42Z", "type": "Dataset", "title": "Transformation Rate Maps of Dissolved Organic Carbon in the Contiguous U.S.", "description": "unspecifiedWe develop two new maps of the dissolved organic carbon (DOC) transformation rate ( (P_r )) over the contiguous United States. Those maps are derived by combining the USGS riverine DOC observations, soil organic carbon (SOC) data from two sources\u2014HWSD v1.2 and SoilGrids 2.0, and the watershed characteristics from two existing datasets medium-resolution NHDplus and ScienceBase, and state-of-the-art machine learning techniques.", "keywords": ["13. Climate action", "Machine learning", "Earth system modeling", "15. 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