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Improving an existing proxy-based approach for floodplain denitrification assessment to facilitate decision making on restoration.
Kaden, Ute Susanne; Schulz-Zunkel, Christiane; Fuchs, Elmar; Horchler, Peter; Kasperidus, Hans Dieter; de Moraes Bonilha, Otavio; Rupp, Holger; Tschikof, Martin; Weigelhofer, Gabriele; Hein, Thomas; Scholz, Mathias.
Afiliação
  • Kaden US; UFZ Helmholtz Centre for Environmental Research, Department of Conservation Biology and Social-Ecological Systems, Permoserstraße 15, 04318 Leipzig, Germany; BOKU, University of Natural Resources and Life Sciences, Institute of Hydrobiology and Aquatic Ecosystem Management, Gregor-Mendel-Straße 33,
  • Schulz-Zunkel C; BfN, Federal Agency for Nature Conservation, Division II 1.4 Nationwide Biodiversity Monitoring and Marine Monitoring, Leipzig Office, Alte Messe 6, 043103 Leipzig, Germany. Electronic address: christiane.schulz-zunkel@bfn.de.
  • Fuchs E; BfG, Federal Institute of Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany. Electronic address: fuchs@bafg.de.
  • Horchler P; BfG, Federal Institute of Hydrology, Am Mainzer Tor 1, 56068 Koblenz, Germany. Electronic address: horchler@bafg.de.
  • Kasperidus HD; UFZ Helmholtz Centre for Environmental Research, Department of Conservation Biology and Social-Ecological Systems, Permoserstraße 15, 04318 Leipzig, Germany. Electronic address: hans.kasperidus@ufz.de.
  • de Moraes Bonilha O; UFZ Helmholtz Centre for Environmental Research, Department of Conservation Biology and Social-Ecological Systems, Permoserstraße 15, 04318 Leipzig, Germany. Electronic address: otavio.de-moraes-bonilha@ufz.de.
  • Rupp H; UFZ, Helmholtz Centre for Environmental Research, Department Soil System Science, Lysimeter Facility Falkenberg, Falkenberg 55, 39615 Altmärkische Wische, Germany. Electronic address: holger.rupp@ufz.de.
  • Tschikof M; BOKU, University of Natural Resources and Life Sciences, Institute of Hydrobiology and Aquatic Ecosystem Management, Gregor-Mendel-Straße 33, 1180 Vienna, Austria. Electronic address: martin.tschikof@boku.ac.at.
  • Weigelhofer G; BOKU, University of Natural Resources and Life Sciences, Institute of Hydrobiology and Aquatic Ecosystem Management, Gregor-Mendel-Straße 33, 1180 Vienna, Austria; WCL-WasserCluster Lunz, Dr. Carl Kupelwieser Promenade 5, 3293 Lunz/See, Austria. Electronic address: gabriele.weigelhofer@wcl.ac.at.
  • Hein T; BOKU, University of Natural Resources and Life Sciences, Institute of Hydrobiology and Aquatic Ecosystem Management, Gregor-Mendel-Straße 33, 1180 Vienna, Austria; WCL-WasserCluster Lunz, Dr. Carl Kupelwieser Promenade 5, 3293 Lunz/See, Austria; Christian Doppler Laboratory for Meta Ecosystem Dynami
  • Scholz M; UFZ Helmholtz Centre for Environmental Research, Department of Conservation Biology and Social-Ecological Systems, Permoserstraße 15, 04318 Leipzig, Germany. Electronic address: mathias.scholz@ufz.de.
Sci Total Environ ; 892: 164727, 2023 Sep 20.
Article em En | MEDLINE | ID: mdl-37290658
ABSTRACT
Excess nitrogen (N) from agricultural sources is a major contributor to the water pollution of rivers in Europe. Floodplains are of tremendous importance as they can permanently remove nitrate (NO3) from the environment by releasing reactive N to the atmosphere in its gaseous forms (N2O, N2) during denitrification. However, the quantitative assessment of this ecosystem function is still challenging, particularly on the national level. In this study, we modeled the potential of NO3-N removal through microbial denitrification in soils of the active floodplains of the river Elbe and river Rhine in Germany. We combined laboratory measurements of soil denitrification potentials with straightforward modelling data, covering the average inundation duration from six study areas, to improve an existing Germany-wide proxy-based approach (PBAe) on NO3-N retention potential. The PBAe estimates this potential to be 30-150 kg NO3-N ha-1 yr-1. However, with soil pH and Floodplain Status Category identified as essential parameters for the proxies, the improved PBA (PBAi) yields a removal potential of 5-480 kg N ha-1 yr-1. To account for these parameters, we applied scaling factors using a bonus-malus system with a base value of 10-120 N ha-1 yr-1. Upscaling the determined proxies of the PBAi to the entire active floodplains of the river Elbe and river Rhine results in similarly high NO3-N retention sums of ~7000 t yr-1 in spite of very different retention area sizes, strengthening the argument for area availability as the primary objective of restoration efforts. Although PBAs are always subject to uncertainty, the PBAi enables a more differentiated spatial quantification of denitrification because local key controlling parameters are included. Hence, the PBAi is an innovative and robust approach to quantify denitrification in floodplain soils, supporting a better assessment of ecosystem services for decision-making on floodplain restoration.
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Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ecossistema / Desnitrificação Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2023 Tipo de documento: Article

Texto completo: 1 Coleções: 01-internacional Base de dados: MEDLINE Assunto principal: Ecossistema / Desnitrificação Tipo de estudo: Prognostic_studies Idioma: En Ano de publicação: 2023 Tipo de documento: Article