Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean
14 pages, 3 figures, 2 tables.-- This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited Taurine (Tau), an amino acid-like compound, is present in almost a...
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Online Access: | http://hdl.handle.net/10261/160202 https://doi.org/10.1002/lno.10603 |
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ftcsic:oai:digital.csic.es:10261/160202 2024-02-11T10:06:41+01:00 Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean Clifford, Elisabeth L. Hansell, Dennis A. Varela, Marta M. Nieto-Cid, Mar Herndl, Gerhard J. Sintes, Eva 2017 http://hdl.handle.net/10261/160202 https://doi.org/10.1002/lno.10603 en eng John Wiley & Sons Publisher's version Sí Limnology and Oceanography 62(6): 2745-2758 (2017) 0024-3590 http://hdl.handle.net/10261/160202 doi:10.1002/lno.10603 1939-5590 29242669 open artículo http://purl.org/coar/resource_type/c_6501 2017 ftcsic https://doi.org/10.1002/lno.10603 2024-01-16T10:28:06Z 14 pages, 3 figures, 2 tables.-- This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited Taurine (Tau), an amino acid-like compound, is present in almost all marine metazoans including crustacean zooplankton. It plays an important physiological role in these organisms and is released into the ambient water throughout their life cycle. However, limited information is available on the release rates by marine organisms, the concentrations and turnover of Tau in the ocean. We determined dissolved free Tau concentrations throughout the water column and its release by abundant crustacean mesozooplankton at two open ocean sites (Gulf of Alaska and North Atlantic). At both locations, the concentrations of dissolved free Tau were in the low nM range (up to 15.7 nM) in epipelagic waters, declining sharply in the mesopelagic to about 0.2 nM and remaining fairly stable throughout the bathypelagic waters. Pacific amphipod–copepod assemblages exhibited lower dissolved free Tau release rates per unit biomass (0.8 ± 0.4 μmol g−1 C-biomass h−1) than Atlantic copepods (ranging between 1.3 ± 0.4 μmol g−1 C-biomass h−1 and 9.5 ± 2.1 μmol g−1 C-biomass h−1), in agreement with the well-documented inverse relationship between biomass-normalized excretion rates and body size. Our results indicate that crustacean zooplankton might contribute significantly to the dissolved organic matter flux in marine ecosystems via dissolved free Tau release. Based on the release rates and assuming steady state dissolved free Tau concentrations, turnover times of dissolved free Tau range from 0.05 d to 2.3 d in the upper water column and are therefore similar to those of dissolved free amino acids. This rapid turnover indicates that dissolved free Tau is efficiently consumed in oceanic waters, most likely by heterotrophic bacteria This study was supported by the Austrian Science Fund (FWF; P27696-B22) to ... Article in Journal/Newspaper North Atlantic Alaska Copepods Digital.CSIC (Spanish National Research Council) Gulf of Alaska Pacific Limnology and Oceanography 62 6 2745 2758 |
institution |
Open Polar |
collection |
Digital.CSIC (Spanish National Research Council) |
op_collection_id |
ftcsic |
language |
English |
description |
14 pages, 3 figures, 2 tables.-- This is an open access article under the terms of the Creative Commons Attribution License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited Taurine (Tau), an amino acid-like compound, is present in almost all marine metazoans including crustacean zooplankton. It plays an important physiological role in these organisms and is released into the ambient water throughout their life cycle. However, limited information is available on the release rates by marine organisms, the concentrations and turnover of Tau in the ocean. We determined dissolved free Tau concentrations throughout the water column and its release by abundant crustacean mesozooplankton at two open ocean sites (Gulf of Alaska and North Atlantic). At both locations, the concentrations of dissolved free Tau were in the low nM range (up to 15.7 nM) in epipelagic waters, declining sharply in the mesopelagic to about 0.2 nM and remaining fairly stable throughout the bathypelagic waters. Pacific amphipod–copepod assemblages exhibited lower dissolved free Tau release rates per unit biomass (0.8 ± 0.4 μmol g−1 C-biomass h−1) than Atlantic copepods (ranging between 1.3 ± 0.4 μmol g−1 C-biomass h−1 and 9.5 ± 2.1 μmol g−1 C-biomass h−1), in agreement with the well-documented inverse relationship between biomass-normalized excretion rates and body size. Our results indicate that crustacean zooplankton might contribute significantly to the dissolved organic matter flux in marine ecosystems via dissolved free Tau release. Based on the release rates and assuming steady state dissolved free Tau concentrations, turnover times of dissolved free Tau range from 0.05 d to 2.3 d in the upper water column and are therefore similar to those of dissolved free amino acids. This rapid turnover indicates that dissolved free Tau is efficiently consumed in oceanic waters, most likely by heterotrophic bacteria This study was supported by the Austrian Science Fund (FWF; P27696-B22) to ... |
format |
Article in Journal/Newspaper |
author |
Clifford, Elisabeth L. Hansell, Dennis A. Varela, Marta M. Nieto-Cid, Mar Herndl, Gerhard J. Sintes, Eva |
spellingShingle |
Clifford, Elisabeth L. Hansell, Dennis A. Varela, Marta M. Nieto-Cid, Mar Herndl, Gerhard J. Sintes, Eva Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
author_facet |
Clifford, Elisabeth L. Hansell, Dennis A. Varela, Marta M. Nieto-Cid, Mar Herndl, Gerhard J. Sintes, Eva |
author_sort |
Clifford, Elisabeth L. |
title |
Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
title_short |
Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
title_full |
Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
title_fullStr |
Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
title_full_unstemmed |
Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
title_sort |
crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean |
publisher |
John Wiley & Sons |
publishDate |
2017 |
url |
http://hdl.handle.net/10261/160202 https://doi.org/10.1002/lno.10603 |
geographic |
Gulf of Alaska Pacific |
geographic_facet |
Gulf of Alaska Pacific |
genre |
North Atlantic Alaska Copepods |
genre_facet |
North Atlantic Alaska Copepods |
op_relation |
Publisher's version Sí Limnology and Oceanography 62(6): 2745-2758 (2017) 0024-3590 http://hdl.handle.net/10261/160202 doi:10.1002/lno.10603 1939-5590 29242669 |
op_rights |
open |
op_doi |
https://doi.org/10.1002/lno.10603 |
container_title |
Limnology and Oceanography |
container_volume |
62 |
container_issue |
6 |
container_start_page |
2745 |
op_container_end_page |
2758 |
_version_ |
1790604558970388480 |