Isotopologue ratios of N2O and N-2 measurements underpin the importance of denitrification in differently N-loaded riparian alder forests
| العنوان: | Isotopologue ratios of N2O and N-2 measurements underpin the importance of denitrification in differently N-loaded riparian alder forests |
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| المؤلفون: | Ülo Mander, Kaido Soosaar, Arno Kanal, Krista Lõhmus, Martin Maddison, Julien Tournebize, Jaak Truu, Daniel Weymann, Jürgen Augustin, Reinhard Well |
| المساهمون: | UNIVERSITY OF TARTU INSTITUTE OF ECOLOGY AND EARTH SCIENCES EST, Partenaires IRSTEA, Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA)-Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), Hydrosystèmes et Bioprocédés (UR HBAN), Institut national de recherche en sciences et technologies pour l'environnement et l'agriculture (IRSTEA), THUNEN INSTITUTE OF CLIMATE SMART AGRICULTURE BRAUNSCHWEIG DEU, FORSCHUNGSZENTRUM JULICH AGROSPHERE INSTITUTE JULICH DEU, INSTITUTE OF LANDSCAPE MATTER DYNAMICS LEIBNIZ CENTRE FOR AGRICULTURAL LANDSCAPE AND LAND USE RESEARCH ZALF MUNCHEBERG DEU |
| المصدر: | Environmental Science and Technology Environmental Science and Technology, American Chemical Society, 2014, 48 (20), pp.11910-11918. ⟨10.1021/es501727h⟩ |
| بيانات النشر: | HAL CCSD, 2014. |
| سنة النشر: | 2014 |
| مصطلحات موضوعية: | Estonia, Biogeochemical cycle, Denitrification, Riparian buffer, Nitrogen, SITE PREFERENCE, Nitrous Oxide, Forests, 010501 environmental sciences, Alnus, 01 natural sciences, Alder, FILLED PORE SPACE, Water Quality, Environmental Chemistry, GASEOUS NITROGEN, Isotopologue, Groundwater, 0105 earth and related environmental sciences, Riparian zone, Hydrology, geography, CARBON FLUXES, geography.geographical_feature_category, biology, 04 agricultural and veterinary sciences, General Chemistry, 15. Life on land, biology.organism_classification, DUAL ISOTOPE, SOIL, 13. Climate action, NITRATE CONTAMINATED AQUIFERS, [SDE]Environmental Sciences, 040103 agronomy & agriculture, 0401 agriculture, forestry, and fisheries, Environmental science, Water quality, WASTE WATER TREATMENT |
| الوصف: | International audience; Known as biogeochemical hotspots in landscapes, riparian buffer zones exhibit considerable potential concerning mitigation of groundwater contaminants such as nitrate, but may in return enhance the risk for indirect N2O emission. Here we aim to assess and to compare two riparian gray alder forests in terms of gaseous N2O and N-2 fluxes and dissolved N2O, N-2, and NO3(-) in the near-surface groundwater. We further determine for the first time isotopologue ratios of N2O dissolved in the riparian groundwater in order to support our assumption that it mainly originated from denitrification. The study sites, both situated in Estonia, northeastern Europe, receive contrasting N loads from adjacent uphill arable land. Whereas N2O emissions were rather small at both sites, average gaseous N-2-to-N2O ratios inferred from closed-chamber measurements and HeO laboratory incubations were almost four times smaller for the heavily loaded site. In contrast, groundwater parameters were less variable among sites and between landscape positions. Campaign-based average N-15 site preferences of N2O (SP) in riparian groundwater ranged between 11 and 44. Besides the strong prevalence of N-2 emission over N2O fluxes and the correlation pattern between isotopologue and water quality data, this comparatively large range highlights the importance of denitrification and N2O reduction in both riparian gray alder stands. |
| اللغة: | English |
| تدمد: | 0013-936X 1520-5851 |
| DOI: | 10.1021/es501727h⟩ |
| URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::4131de6b3f258f895e37b3c99bb1c40d https://hal.inrae.fr/hal-02600786 |
| رقم الانضمام: | edsair.doi.dedup.....4131de6b3f258f895e37b3c99bb1c40d |
| قاعدة البيانات: | OpenAIRE |
| تدمد: | 0013936X 15205851 |
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| DOI: | 10.1021/es501727h⟩ |