{"type": "FeatureCollection", "features": [{"id": "10.1007/s10750-009-9715-y", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:14:51Z", "type": "Journal Article", "created": "2009-02-13", "title": "Heterotrophic Nitrogen Fixation In Oligotrophic Tropical Marshes: Changes After Phosphorus Addition", "description": "In order to determine the impact of nutrient enrichment on phosphorus (P) limited wetlands, we established experimental P additions in marshes throughout northern Belize. P significantly increased macrophyte primary production, which led to the rapid elimination of cyanobacterial mats. The replacement of cyanobacterial mats by macrophytes constrained autotrophic nitrogen (N) fixation, increased the quantity, and changed the quality of organic matter input to the sediments. We predicted that the activity of sediment heterotrophic N fixers will be impacted by these alterations in carbon input. We used the acetylene reduction technique to measure potential (glucose amended) nitrogenase activity (NA) in sediments from controls and treatment plots that have been P enriched for four years and dominated either by Eleocharis cellulosa, or Typha domingensis for two years. NA in P-enriched plots was 2\u20133 orders of magnitude higher than NA in controls. NA was positively correlated with the soil reactive P, both total organic and microbial carbon, live root biomass, and total phospholipid fatty acids (PLFA) as an indicator of active microbial biomass. It was negatively correlated with the concentration of ammonium-N. Path analysis revealed that the indirect effect of P on NA through the root biomass was more important than the direct effect of P. NA of the upper sediment layer was consistently higher in Eleocharis than in Typha dominated plots, despite the higher litter input by Typha. We feel that the higher levels of lignin and phenolics occurring in Typha litter, relative to Eleocharis, constrained NA in Typha plots.", "keywords": ["0106 biological sciences", "Freshwater & Marine Ecology", "Salinity", "Ecology", "Life Sciences", "Phosphorus", "04 agricultural and veterinary sciences", "Aquatic Science", "15. Life on land", "Cyanobacteria", "Pollution", "01 natural sciences", "6. Clean water", "Environmental Science(all)", "13. Climate action", "Heterotrophic nitrogen fixation", "0401 agriculture", " forestry", " and fisheries", "Zoology", "Typha", "Eleocharis"], "contacts": [{"organization": "\u010cern\u00e1, Barbora, Rejm\u00e1nkov\u00e1, Eli\u0161ka, Snyder, Jenise M., \u0160antr\u016f\u010dkov\u00e1, Hana,", "roles": ["creator"]}]}, "links": [{"href": "https://escholarship.org/content/qt0xk5x7sm/qt0xk5x7sm.pdf"}, {"href": "https://doi.org/10.1007/s10750-009-9715-y"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Hydrobiologia", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1007/s10750-009-9715-y", "name": "item", "description": "10.1007/s10750-009-9715-y", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1007/s10750-009-9715-y"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2009-02-13T00:00:00Z"}}, {"id": "10.1016/j.marpolbul.2016.05.049", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:16:34Z", "type": "Journal Article", "created": "2016-06-11", "title": "Rehabilitating Mangrove Ecosystem Services: A Case Study On The Relative Benefits Of Abandoned Pond Reversion From Panay Island, Philippines", "description": "Mangroves provide vital climate change mitigation and adaptation (CCMA) ecosystem services (ES), yet have suffered extensive tropics-wide declines. To mitigate losses, rehabilitation is high on the conservation agenda. However, the relative functionality and ES delivery of rehabilitated mangroves in different intertidal locations is rarely assessed. In a case study from Panay Island, Philippines, using field- and satellite-derived methods, we assess carbon stocks and coastal protection potential of rehabilitated low-intertidal seafront and mid- to upper-intertidal abandoned (leased) fishpond areas, against reference natural mangroves. Due to large sizes and appropriate site conditions, targeted abandoned fishpond reversion to former mangrove was found to be favourable for enhancing CCMA in the coastal zone. In a municipality-specific case study, 96.7% of abandoned fishponds with high potential for effective greenbelt rehabilitation had favourable tenure status for reversion. These findings have implications for coastal zone management in Asia in the face of climate change.", "keywords": ["0106 biological sciences", "Carbon Sequestration", "Conservation of Natural Resources", "coastal protection", "mangroves", "Philippines", "Aquatic Science", "15. Life on land", "Oceanography", "Pollution", "01 natural sciences", "Carbon", "rehabilitation", "carbon stocks", "13. Climate action", "Wetlands", "11. Sustainability", "14. Life underwater", "ecosystem services", "Ponds", "abandoned aquaculture ponds", "Ecosystem", "Environmental Restoration and Remediation", "0105 earth and related environmental sciences"]}, "links": [{"href": "https://doi.org/10.1016/j.marpolbul.2016.05.049"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Marine%20Pollution%20Bulletin", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1016/j.marpolbul.2016.05.049", "name": "item", "description": "10.1016/j.marpolbul.2016.05.049", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1016/j.marpolbul.2016.05.049"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2016-08-01T00:00:00Z"}}, {"id": "10.1029/2018JE005899", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:17:25Z", "type": "Journal Article", "created": "2020-03-09", "title": "Initiation and Flow Conditions of Contemporary Flows in Martian Gullies", "description": "

<p>Understanding the initial and flow conditions of contemporary flows in Martian gullies, generally believed to be triggered and fluidized by CO<sub>2</sub> sublimation, is crucial for deciphering climate conditions needed to trigger and sustain them. We employ the RAMMS (RApid Mass Movement Simulation) debris flow and avalanche model to back-calculate initial and flow conditions of recent flows in three gullies in Hale crater. We infer minimum release depths of 1.0–1.5 m and initial release volumes of 100–200 m<sup>3</sup>. Entrainment leads to final flow volumes that are 2.5–5.5 times larger than initially released, and entrainment is found necessary to match the observed flow deposits. Simulated mean cross-channel flow velocities decrease from 3–4 m s<sup>-1</sup> to ~1 m s<sup>-1</sup> from release area to flow terminus, while flow depths generally decrease from 0.5–1 m to 0.1–0.2 m. The mean cross-channel erosion depth and deposition thicknesses are _0.1–0.3 m. Back-calculated dry-Coulomb friction ranges from 0.1 to 0.25 and viscous turbulent friction between 100–200 m s<sup>-2</sup>, which are values similar to those of granular debris flows on Earth. These results suggest that recent flows in gullies are fluidized to a similar degree as are granular debris flows on Earth. Using a novel model for mass-flow fluidization by CO<sub>2</sub> sublimation we are able to show that under Martian atmospheric conditions very small volumetric fractions of CO<sub>2</sub> of ~1% within mass flows may indeed yield sufficiently large gas fluxes to cause fluidization and enhance flow mobility.</p>

", "keywords": ["Atmospheric Science", "550", "[SDU.STU.GM] Sciences of the Universe [physics]/Earth Sciences/Geomorphology", "0211 other engineering and technologies", "Soil Science", "Mars", "Hale crater", "02 engineering and technology", "Aquatic Science", "carbon dioxide; gullies; Hale crater; Mars; modeling; RAMMS", "551", "Oceanography", "01 natural sciences", "[SDU.STU.PL]Sciences of the Universe [physics]/Earth Sciences/Planetology", "Geochemistry and Petrology", "Earth and Planetary Sciences (miscellaneous)", "SDG 13 - Climate Action", "Research Articles", "Water Science and Technology", "Earth-Surface Processes", "0105 earth and related environmental sciences", "Ecology", "Palaeontology", "carbon dioxide", "Forestry", "modeling", "RAMMS", "Geophysics", "Space and Planetary Science", "13. Climate action", "[SDU.STU.PL] Sciences of the Universe [physics]/Earth Sciences/Planetology", "gullies"]}, "links": [{"href": "http://dro.dur.ac.uk/28802/1/28802.pdf"}, {"href": "http://dro.dur.ac.uk/28802/2/28802.pdf"}, {"href": "https://agupubs.onlinelibrary.wiley.com/doi/pdf/10.1029/2018JE005899"}, {"href": "https://doi.org/10.1029/2018JE005899"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Geophysical%20Research%3A%20Planets", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "10.1029/2018JE005899", "name": "item", "description": "10.1029/2018JE005899", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/10.1029/2018JE005899"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-08-01T00:00:00Z"}}, {"id": "2268/252074", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:24:43Z", "type": "Other", "title": "Effects of the hydrogeochemical stratification on the distribution of GHGs concentrations and their production/consumption processes in groundwater", "description": "RestrictedRegulation of the concentrations of greenhouse gases (GHGs) in the environment has become one of the major challenges faced by global community. In order to understand better which measures could be applied to stop the rising concentrations of N2O, CO2 and CH4 in the atmosphere, it is important to better constrain their budgets. Research findings, devoted to the study of GHGs fluxes, have reported that under agricultural areas groundwater is generally characterized with increased concentrations of N2O due to microbial conversion of N compounds derived from the application of organic and inorganic fertilizers. Previous investigations performed in the Cretaceous Hesbaye chalk aquifer in Eastern Belgium have characterized the variability of GHGs along the lateral and vertical dimensions of the aquifer taking into account the difference in hydrogeochemistry, hydrogeology and urbanization level. Results obtained from the interpretations of NO3-, N2O, SO42-, B isotopes signatures and N2O isotopomers suggested that the dynamics of N2O in the chalk aquifer was governed by different, possibly overlapping reaction mechanisms such as nitrification, denitrification or nitrifier-denitrification. They also revealed the occurrence of CH4 in oxic conditions simultaneously with electron acceptors of higher energy yield. In order to understand the mechanisms governing the observed trends in GHGs concentrations, local scale investigations have been planified to better constrict the conditions of occurrence of GHGs transformation processes and disentangle their shifting dynamics. In this context, low-flow groundwater sampling procedures were applied at different depth intervals to obtain better insight into the possible vertical extent of oxic and anoxic zones, occurrence of biogeochemical processes typically active in these zones and accumulation of GHGs in different hydrogeochemical conditions. Afterwards, series of push-pull tests, using NO3- and NH4+ compounds labeled with heavy 15N isotope were conducted to quantify the rates of nitrification and denitrification processes. Such studies help to clarify which conditions are more prone to the accumulation of high concentrations of GHGs in aquifers and better constrain the mass-balance models of GHGs production/consumption in groundwater.", "keywords": ["2. Zero hunger", "Sciences aquatiques & oc\u00e9anologie", "13. Climate action", "Sciences du vivant", "Aquatic sciences & oceanology", "Greenhouse gases (GHGs)", "15. Life on land", "N isotopes", "Groundwater", "Life sciences", "6. Clean water"], "contacts": [{"organization": "Nikolenko, Olha, Orban, Philippe, Morana, C\u00e9dric, Borges, Alberto, Jamin, Pierre, Brouy\u00e8re, Serge,", "roles": ["creator"]}]}, "links": [{"href": "https://doi.org/2268/252074"}, {"rel": "self", "type": "application/geo+json", "title": "2268/252074", "name": "item", "description": "2268/252074", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/252074"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2019-09-01T00:00:00Z"}}, {"id": "2268/227432", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:24:43Z", "type": "Other", "title": "Dynamics of nitrous oxide in groundwater under agricultural areas: insights from multi-isotopic studies (15N, 34S, 18O, 13C, 3H)", "description": "Open AccessTransfer of GHGs in the soil \u2013 vadose zone \u2013 groundwater \u2013 river \u2013 atmosphere system", "keywords": ["Sciences aquatiques & oc\u00e9anologie", "Sciences de l\u2019environnement & \u00e9cologie", "Environmental sciences & ecology", "groundwater", "Sciences du vivant", "Aquatic sciences & oceanology", "Life sciences", "isotopes", "agriculture"], "contacts": [{"organization": "Nikolenko, Olha, Orban, Philippe, Jurado, Anna, Borges, Alberto, Brouy\u00e8re, Serge,", "roles": ["creator"]}]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/227432/1/abstract.pdf"}, {"href": "https://doi.org/2268/227432"}, {"rel": "self", "type": "application/geo+json", "title": "2268/227432", "name": "item", "description": "2268/227432", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/227432"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2018-04-20T00:00:00Z"}}, {"id": "2268/262547", "type": "Feature", "geometry": null, "properties": {"updated": "2026-05-24T16:24:43Z", "type": "Journal Article", "created": "2021-03-18", "title": "Dynamics of nitrous oxide with depth in groundwater: Insights from ambient groundwater and laboratory incubation experiments (Hesbaye chalk aquifer, Belgium)", "description": "Aquifers under agricultural areas are considered to be an indirect source of nitrous oxide emission (N2O) to the atmosphere, which is the greenhouse gas (GHGs) characterized with the highest global warning potential and acts as a stratospheric ozone depletion agent. Previous investigations performed in the Cretaceous Hesbaye chalk aquifer in Eastern Belgium suggested that the dynamics of N2O in the aquifer is controlled by overlapping biochemical processes such as nitrification and denitrification. The current study aims to obtain better insight concerning the factors controlling the distribution of N2O concentration along a vertical dimension in the aquifer, and to capture and quantify the occurrence of nitrification and denitrification processes in the groundwater system. Low-flow groundwater sampling technique was undertaken at different depths in the aquifer to collect groundwater samples aiming at obtaining information about ambient aquifer hydrogeochemical conditions and their effect on the accumulation of GHGs. Afterwards, laboratory stable isotope experiments, using NO3- and NH4+ compounds labeled with heavy 15N isotope, were applied to quantify the rates of nitrification and denitrification processes. Ambient studies suggest that the occurrence of N transformation was related to denitrification while laboratory incubation experiments did not detect it. Such controversial results might be explained by the discrepancy between real aquifer conditions and lab design studies. Thus, additional in situ tracer experiments should be carried out in areas where natural groundwater fluxes do not flush the injected tracer too rapidly. In addition, it would be useful to conduct microbiological studies to obtain better insight into the nature of subsurface biofilm biotope.", "keywords": ["Sciences aquatiques & oc\u00e9anologie", "Physique", " chimie", " math\u00e9matiques & sciences de la terre", "Nitrous Oxide", "01 natural sciences", "Low-flow sampling", "Ing\u00e9nierie", " informatique & technologie", "Calcium Carbonate", "Physical", " chemical", " mathematical & earth Sciences", "Belgium", "Groundwater", "0105 earth and related environmental sciences", "2. Zero hunger", "Aquatic sciences & oceanology", "N stable isotope analysis", "Life sciences", "Nitrification", "Geological", " petroleum & mining engineering", "6. Clean water", "Engineering", " computing & technology", "Sciences de la terre & g\u00e9ographie physique", "Greenhouse gases", "13. Climate action", "Earth sciences & physical geography", "Sciences du vivant", "Denitrification", "G\u00e9ologie", " ing\u00e9nierie du p\u00e9trole & des mines", "Laboratories"]}, "links": [{"href": "https://orbi.uliege.be/bitstream/2268/262547/2/Dynamics%20of%20nitrous%20oxide%20with%20depth%20in%20groundwater%20insights%20from%20ambient%20groundwater.pdf"}, {"href": "https://doi.org/2268/262547"}, {"rel": "related", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/Journal%20of%20Contaminant%20Hydrology", "name": "related record", "description": "related record", "type": "application/json"}, {"rel": "self", "type": "application/geo+json", "title": "2268/262547", "name": "item", "description": "2268/262547", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items/2268/262547"}, {"rel": "collection", "type": "application/json", "title": "Collection", "name": "collection", "description": "Collection", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main"}], "time": {"date": "2021-08-01T00:00:00Z"}}], "links": [{"rel": "self", "type": "application/geo+json", "title": "This document as GeoJSON", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Aquatic+Science&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=Aquatic+Science&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=Aquatic+Science&", "hreflang": "en-US"}, {"rel": "last", "type": "application/geo+json", "title": "items (last)", "href": "https://repository.soilwise-he.eu/cat/collections/metadata:main/items?keywords=Aquatic+Science&offset=6", "hreflang": "en-US"}], "numberMatched": 6, "numberReturned": 6, "distributedFeatures": [], "timeStamp": "2026-05-25T00:55:34.599720Z"}