Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries
Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using N-15-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 mu mol N l(-1) h(-1) and 0.00025 to 0.25 mu mol N l(-1) h(-1), respectively, and differe...
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Online Access: | https://pure.knaw.nl/portal/en/publications/7c58658f-66b0-4a17-b685-49d8c3805b6b https://doi.org/10.3354/meps192079 https://hdl.handle.net/20.500.11755/7c58658f-66b0-4a17-b685-49d8c3805b6b https://pure.knaw.nl/ws/files/471466/Middelburg_ea_2580.pdf |
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ftknawnlpublic:oai:pure.knaw.nl:publications/7c58658f-66b0-4a17-b685-49d8c3805b6b 2024-04-28T08:31:26+00:00 Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries Middelburg, J.J. Nieuwenhuize, J. 2000 application/pdf https://pure.knaw.nl/portal/en/publications/7c58658f-66b0-4a17-b685-49d8c3805b6b https://doi.org/10.3354/meps192079 https://hdl.handle.net/20.500.11755/7c58658f-66b0-4a17-b685-49d8c3805b6b https://pure.knaw.nl/ws/files/471466/Middelburg_ea_2580.pdf eng eng https://pure.knaw.nl/portal/en/publications/7c58658f-66b0-4a17-b685-49d8c3805b6b info:eu-repo/semantics/openAccess Middelburg , J J & Nieuwenhuize , J 2000 , ' Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries ' , Marine Ecology Progress Series , vol. 192 , pp. 79-88 . https://doi.org/10.3354/meps192079 article 2000 ftknawnlpublic https://doi.org/10.3354/meps19207920.500.11755/7c58658f-66b0-4a17-b685-49d8c3805b6b 2024-04-11T00:14:26Z Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using N-15-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 mu mol N l(-1) h(-1) and 0.00025 to 0.25 mu mol N l(-1) h(-1), respectively, and differed significantly between and within estuaries. Analysis of nitrogen uptake using the relative preferential index (RPI) indicated ammonium to be the preferred substrate. The turnover times of particulate nitrogen (0.7 to 31 d) and dissolved ammonium (0.1 to 27 d) were similar to or shorter than estuarine-water residence times, whereas turnover times of dissolved nitrate (19 to 2160 d) were longer than residence times. Assimilation of nitrate in the water column of estuaries consequently does not influence its distribution, and most nitrate entering or produced in estuaries flushes through unless significant denitrification and/or burial in the sediment occur. As ammonium and particulate nitrogen are efficiently recycled, most allochthonous organic matter is extensively microbially modified before export, burial, or consumption by higher trophic levels. [KEYWORDS: nitrogen uptake; nitrogen turnover; ammonium; nitrate; estuary; heterotrophy Ecosystem model moses; north-atlantic ocean; schelde estuary; sw netherlands; river estuary; heterotrophic bacteria; westerschelde estuary; organic nitrogen; delaware estuary; nitrate uptake] Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using N-15-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 mu mol N l(-1) h(-1) and 0.00025 to 0.25 mu mol N l(-1) h(-1), respectively, and differed significantly between and within estuaries. Analysis of nitrogen uptake using the relative preferential index (RPI) indicated ammonium to be the preferred substrate. The turnover times of particulate nitrogen (0.7 to 31 d) and dissolved ammonium (0.1 to 27 d) were similar to or shorter than ... Article in Journal/Newspaper North Atlantic KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) Marine Ecology Progress Series 192 79 88 |
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Open Polar |
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KNAW: Research Explorer (Royal Netherlands Academy of Arts and Sciences) |
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ftknawnlpublic |
language |
English |
description |
Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using N-15-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 mu mol N l(-1) h(-1) and 0.00025 to 0.25 mu mol N l(-1) h(-1), respectively, and differed significantly between and within estuaries. Analysis of nitrogen uptake using the relative preferential index (RPI) indicated ammonium to be the preferred substrate. The turnover times of particulate nitrogen (0.7 to 31 d) and dissolved ammonium (0.1 to 27 d) were similar to or shorter than estuarine-water residence times, whereas turnover times of dissolved nitrate (19 to 2160 d) were longer than residence times. Assimilation of nitrate in the water column of estuaries consequently does not influence its distribution, and most nitrate entering or produced in estuaries flushes through unless significant denitrification and/or burial in the sediment occur. As ammonium and particulate nitrogen are efficiently recycled, most allochthonous organic matter is extensively microbially modified before export, burial, or consumption by higher trophic levels. [KEYWORDS: nitrogen uptake; nitrogen turnover; ammonium; nitrate; estuary; heterotrophy Ecosystem model moses; north-atlantic ocean; schelde estuary; sw netherlands; river estuary; heterotrophic bacteria; westerschelde estuary; organic nitrogen; delaware estuary; nitrate uptake] Ammonium and nitrate uptake was measured in 6 European tidal estuaries (Ems, Rhine, Scheldt, Loire, Gironde and Douro) using N-15-tracer techniques. Uptake rates of ammonium and nitrate ranged from 0.005 to 1.56 mu mol N l(-1) h(-1) and 0.00025 to 0.25 mu mol N l(-1) h(-1), respectively, and differed significantly between and within estuaries. Analysis of nitrogen uptake using the relative preferential index (RPI) indicated ammonium to be the preferred substrate. The turnover times of particulate nitrogen (0.7 to 31 d) and dissolved ammonium (0.1 to 27 d) were similar to or shorter than ... |
format |
Article in Journal/Newspaper |
author |
Middelburg, J.J. Nieuwenhuize, J. |
spellingShingle |
Middelburg, J.J. Nieuwenhuize, J. Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
author_facet |
Middelburg, J.J. Nieuwenhuize, J. |
author_sort |
Middelburg, J.J. |
title |
Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
title_short |
Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
title_full |
Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
title_fullStr |
Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
title_full_unstemmed |
Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
title_sort |
uptake of dissolved inorganic nitrogen in turbid, tidal estuaries |
publishDate |
2000 |
url |
https://pure.knaw.nl/portal/en/publications/7c58658f-66b0-4a17-b685-49d8c3805b6b https://doi.org/10.3354/meps192079 https://hdl.handle.net/20.500.11755/7c58658f-66b0-4a17-b685-49d8c3805b6b https://pure.knaw.nl/ws/files/471466/Middelburg_ea_2580.pdf |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Middelburg , J J & Nieuwenhuize , J 2000 , ' Uptake of dissolved inorganic nitrogen in turbid, tidal estuaries ' , Marine Ecology Progress Series , vol. 192 , pp. 79-88 . https://doi.org/10.3354/meps192079 |
op_relation |
https://pure.knaw.nl/portal/en/publications/7c58658f-66b0-4a17-b685-49d8c3805b6b |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps19207920.500.11755/7c58658f-66b0-4a17-b685-49d8c3805b6b |
container_title |
Marine Ecology Progress Series |
container_volume |
192 |
container_start_page |
79 |
op_container_end_page |
88 |
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1797588975870803968 |