Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux
Abstract The oligotrophic subtropical gyre covers a vast area of the Atlantic Ocean. Decades of time-series monitoring have generated detailed temporal information about zooplankton species and abundances at fixed locations within the gyre, but their live/dead status is often omitted, especially in...
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2019
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Online Access: | http://dx.doi.org/10.1093/plankt/fbz038 http://academic.oup.com/plankt/article-pdf/41/4/549/30279543/fbz038.pdf |
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croxfordunivpr:10.1093/plankt/fbz038 2024-01-14T10:09:04+01:00 Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux Tang, Kam W Backhaus, Liv Riemann, Lasse Koski, Marja Grossart, Hans-Peter Munk, Peter Nielsen, Torkel Gissel Leibniz Society DFG Danish Centre for Marine Research Carlsberg Foundation 2019 http://dx.doi.org/10.1093/plankt/fbz038 http://academic.oup.com/plankt/article-pdf/41/4/549/30279543/fbz038.pdf en eng Oxford University Press (OUP) https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model Journal of Plankton Research volume 41, issue 4, page 549-560 ISSN 0142-7873 1464-3774 Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics journal-article 2019 croxfordunivpr https://doi.org/10.1093/plankt/fbz038 2023-12-15T09:36:00Z Abstract The oligotrophic subtropical gyre covers a vast area of the Atlantic Ocean. Decades of time-series monitoring have generated detailed temporal information about zooplankton species and abundances at fixed locations within the gyre, but their live/dead status is often omitted, especially in the dynamic subtropical convergence zone (STCZ) where the water column stratification pattern can change considerably across the front as warm and cold water masses converge. We conducted a detailed survey in the North Atlantic STCZ and showed that over 85% of the copepods were typically concentrated in the upper 200 m. Copepod carcasses were present in all samples and their proportional numerical abundances increased with depth, reaching up to 91% at 300–400 m. Overall, 14–19% of the copepods within the upper 200 m were carcasses. Shipboard experiments showed that during carcass decomposition, microbial respiration increased, and the bacterial community associated with the carcasses diverged from that in the ambient water. Combining field and experimental data, we estimated that decomposing copepod carcasses constitute a negligible oxygen sink in the STCZ, but sinking carcasses may represent an overlooked portion of the passive carbon sinking flux and should be incorporated in future studies of carbon flux in this area. Article in Journal/Newspaper North Atlantic Copepods Oxford University Press (via Crossref) Journal of Plankton Research 41 4 549 560 |
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Open Polar |
collection |
Oxford University Press (via Crossref) |
op_collection_id |
croxfordunivpr |
language |
English |
topic |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
spellingShingle |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics Tang, Kam W Backhaus, Liv Riemann, Lasse Koski, Marja Grossart, Hans-Peter Munk, Peter Nielsen, Torkel Gissel Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
topic_facet |
Ecology Aquatic Science Ecology, Evolution, Behavior and Systematics |
description |
Abstract The oligotrophic subtropical gyre covers a vast area of the Atlantic Ocean. Decades of time-series monitoring have generated detailed temporal information about zooplankton species and abundances at fixed locations within the gyre, but their live/dead status is often omitted, especially in the dynamic subtropical convergence zone (STCZ) where the water column stratification pattern can change considerably across the front as warm and cold water masses converge. We conducted a detailed survey in the North Atlantic STCZ and showed that over 85% of the copepods were typically concentrated in the upper 200 m. Copepod carcasses were present in all samples and their proportional numerical abundances increased with depth, reaching up to 91% at 300–400 m. Overall, 14–19% of the copepods within the upper 200 m were carcasses. Shipboard experiments showed that during carcass decomposition, microbial respiration increased, and the bacterial community associated with the carcasses diverged from that in the ambient water. Combining field and experimental data, we estimated that decomposing copepod carcasses constitute a negligible oxygen sink in the STCZ, but sinking carcasses may represent an overlooked portion of the passive carbon sinking flux and should be incorporated in future studies of carbon flux in this area. |
author2 |
Leibniz Society DFG Danish Centre for Marine Research Carlsberg Foundation |
format |
Article in Journal/Newspaper |
author |
Tang, Kam W Backhaus, Liv Riemann, Lasse Koski, Marja Grossart, Hans-Peter Munk, Peter Nielsen, Torkel Gissel |
author_facet |
Tang, Kam W Backhaus, Liv Riemann, Lasse Koski, Marja Grossart, Hans-Peter Munk, Peter Nielsen, Torkel Gissel |
author_sort |
Tang, Kam W |
title |
Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
title_short |
Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
title_full |
Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
title_fullStr |
Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
title_full_unstemmed |
Copepod carcasses in the subtropical convergence zone of the Sargasso Sea: implications for microbial community composition, system respiration and carbon flux |
title_sort |
copepod carcasses in the subtropical convergence zone of the sargasso sea: implications for microbial community composition, system respiration and carbon flux |
publisher |
Oxford University Press (OUP) |
publishDate |
2019 |
url |
http://dx.doi.org/10.1093/plankt/fbz038 http://academic.oup.com/plankt/article-pdf/41/4/549/30279543/fbz038.pdf |
genre |
North Atlantic Copepods |
genre_facet |
North Atlantic Copepods |
op_source |
Journal of Plankton Research volume 41, issue 4, page 549-560 ISSN 0142-7873 1464-3774 |
op_rights |
https://academic.oup.com/journals/pages/open_access/funder_policies/chorus/standard_publication_model |
op_doi |
https://doi.org/10.1093/plankt/fbz038 |
container_title |
Journal of Plankton Research |
container_volume |
41 |
container_issue |
4 |
container_start_page |
549 |
op_container_end_page |
560 |
_version_ |
1788063513510412288 |