High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition
Using a model of plankton and organic-matter cycling we demonstrate that variable stoichiometric ratios can lead to a more than 5-fold higher sensitivity of simulated carbon export to atmospheric N deposition in the ultra-oligotrophic eastern part of the North Atlantic subtropical gyre compared to t...
Published in: | Geophysical Research Letters |
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2012
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Online Access: | https://oceanrep.geomar.de/id/eprint/13995/ https://oceanrep.geomar.de/id/eprint/13995/1/2011GL050606.pdf https://doi.org/10.1029/2011GL050606 |
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ftoceanrep:oai:oceanrep.geomar.de:13995 2023-05-15T17:32:25+02:00 High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition Mouriño-Carballido, Beatriz Pahlow, Markus Oschlies, Andreas 2012 text https://oceanrep.geomar.de/id/eprint/13995/ https://oceanrep.geomar.de/id/eprint/13995/1/2011GL050606.pdf https://doi.org/10.1029/2011GL050606 en eng AGU (American Geophysical Union) https://oceanrep.geomar.de/id/eprint/13995/1/2011GL050606.pdf Mouriño-Carballido, B., Pahlow, M. and Oschlies, A. (2012) High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition. Open Access Geophysical Research Letters, 39 . L05601. DOI 10.1029/2011GL050606 <https://doi.org/10.1029/2011GL050606>. doi:10.1029/2011GL050606 info:eu-repo/semantics/openAccess Article PeerReviewed 2012 ftoceanrep https://doi.org/10.1029/2011GL050606 2023-04-07T15:03:20Z Using a model of plankton and organic-matter cycling we demonstrate that variable stoichiometric ratios can lead to a more than 5-fold higher sensitivity of simulated carbon export to atmospheric N deposition in the ultra-oligotrophic eastern part of the North Atlantic subtropical gyre compared to the westerly oligotrophic region near Bermuda, often used as a reference site for subtropical regions. Stronger nutrient limitation in the ultra-oligotrophic east causes higher phytoplankton C:N ratios and lower carbon assimilation efficiency of zooplankton in the model, which results in a higher export efficiency of carbon to the deep ocean compared to the less nutrient-limited western site. Our results indicate that previous estimates of oceanic carbon uptake associated with atmospheric nitrogen deposition may not be fully robust and that spatial variability in nutrient stress and ecological stoichiometry could significantly affect the biogeochemical impact of increasing atmospheric deposition of anthropogenic nitrogen. Article in Journal/Newspaper North Atlantic OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) Geophysical Research Letters 39 5 n/a n/a |
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Open Polar |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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ftoceanrep |
language |
English |
description |
Using a model of plankton and organic-matter cycling we demonstrate that variable stoichiometric ratios can lead to a more than 5-fold higher sensitivity of simulated carbon export to atmospheric N deposition in the ultra-oligotrophic eastern part of the North Atlantic subtropical gyre compared to the westerly oligotrophic region near Bermuda, often used as a reference site for subtropical regions. Stronger nutrient limitation in the ultra-oligotrophic east causes higher phytoplankton C:N ratios and lower carbon assimilation efficiency of zooplankton in the model, which results in a higher export efficiency of carbon to the deep ocean compared to the less nutrient-limited western site. Our results indicate that previous estimates of oceanic carbon uptake associated with atmospheric nitrogen deposition may not be fully robust and that spatial variability in nutrient stress and ecological stoichiometry could significantly affect the biogeochemical impact of increasing atmospheric deposition of anthropogenic nitrogen. |
format |
Article in Journal/Newspaper |
author |
Mouriño-Carballido, Beatriz Pahlow, Markus Oschlies, Andreas |
spellingShingle |
Mouriño-Carballido, Beatriz Pahlow, Markus Oschlies, Andreas High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
author_facet |
Mouriño-Carballido, Beatriz Pahlow, Markus Oschlies, Andreas |
author_sort |
Mouriño-Carballido, Beatriz |
title |
High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
title_short |
High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
title_full |
High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
title_fullStr |
High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
title_full_unstemmed |
High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
title_sort |
high sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition |
publisher |
AGU (American Geophysical Union) |
publishDate |
2012 |
url |
https://oceanrep.geomar.de/id/eprint/13995/ https://oceanrep.geomar.de/id/eprint/13995/1/2011GL050606.pdf https://doi.org/10.1029/2011GL050606 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
https://oceanrep.geomar.de/id/eprint/13995/1/2011GL050606.pdf Mouriño-Carballido, B., Pahlow, M. and Oschlies, A. (2012) High sensitivity of ultra-oligotrophic marine ecosystems to atmospheric nitrogen deposition. Open Access Geophysical Research Letters, 39 . L05601. DOI 10.1029/2011GL050606 <https://doi.org/10.1029/2011GL050606>. doi:10.1029/2011GL050606 |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1029/2011GL050606 |
container_title |
Geophysical Research Letters |
container_volume |
39 |
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5 |
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_version_ |
1766130560587005952 |