Crustacean zooplankton release copious amounts of dissolved organic matter as taurine in the ocean
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 rel...
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ftpubmed:oai:pubmedcentral.nih.gov:5724677 2023-05-15T17:35:11+02:00 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 2017-06-20 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724677/ https://doi.org/10.1002/lno.10603 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724677/ http://dx.doi.org/10.1002/lno.10603 © 2017 The Authors Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Articles Text 2017 ftpubmed https://doi.org/10.1002/lno.10603 2017-12-17T01:15:53Z 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. Text North Atlantic Alaska Copepods PubMed Central (PMC) Gulf of Alaska Pacific Limnology and Oceanography 62 6 2745 2758 |
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Articles 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 |
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Articles |
description |
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. |
format |
Text |
author |
Clifford, Elisabeth L. Hansell, Dennis A. Varela, Marta M. Nieto‐Cid, Mar Herndl, Gerhard J. Sintes, Eva |
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 and Sons Inc. |
publishDate |
2017 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724677/ 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 |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC5724677/ http://dx.doi.org/10.1002/lno.10603 |
op_rights |
© 2017 The Authors Limnology and Oceanography published by Wiley Periodicals, Inc. on behalf of Association for the Sciences of Limnology and Oceanography This is an open access article under the terms of the Creative Commons Attribution (http://creativecommons.org/licenses/by/4.0/) License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/lno.10603 |
container_title |
Limnology and Oceanography |
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62 |
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6 |
container_start_page |
2745 |
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2758 |
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1766134268014100480 |