Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures
The mesopelagic zooplankton community plays an important role in the cycling and sequestration of carbon via the biological pump. However, little is known about the physiology and ecology of key taxa found within this region, hindering our understanding of their influence on the pathways of energy a...
Published in: | Deep Sea Research Part I: Oceanographic Research Papers |
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Format: | Article in Journal/Newspaper |
Language: | English |
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Elsevier
2024
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Online Access: | http://nora.nerc.ac.uk/id/eprint/537398/ https://nora.nerc.ac.uk/id/eprint/537398/1/1-s2.0-S0967063724000876-main.pdf https://www.sciencedirect.com/science/article/pii/S0967063724000876#da0010 |
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ftnerc:oai:nora.nerc.ac.uk:537398 2024-06-23T07:56:37+00:00 Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures Savineau, Eloise L-R Cook, Kathryn B. Blackbird, Sabena J. Stowasser, Gabriele Kiriakoulakis, Konstadinos Preece, Calum Fielding, Sophie Belcher, Anna Wolff, George A. Tarling, Geraint Mayor, Daniel 2024-06 text http://nora.nerc.ac.uk/id/eprint/537398/ https://nora.nerc.ac.uk/id/eprint/537398/1/1-s2.0-S0967063724000876-main.pdf https://www.sciencedirect.com/science/article/pii/S0967063724000876#da0010 en eng Elsevier https://nora.nerc.ac.uk/id/eprint/537398/1/1-s2.0-S0967063724000876-main.pdf Savineau, Eloise L-R; Cook, Kathryn B. orcid:0000-0001-8590-3011 Blackbird, Sabena J.; Stowasser, Gabriele orcid:0000-0002-0595-0772 Kiriakoulakis, Konstadinos; Preece, Calum; Fielding, Sophie orcid:0000-0002-3152-4742 Belcher, Anna orcid:0000-0002-9583-5910 Wolff, George A.; Tarling, Geraint orcid:0000-0002-3753-5899 Mayor, Daniel orcid:0000-0002-1295-0041 . 2024 Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures. Deep Sea Research Part I: Oceanographic Research Papers, 208, 104317. 47, pp. https://doi.org/10.1016/j.dsr.2024.104317 <https://doi.org/10.1016/j.dsr.2024.104317> cc_by_4 Publication - Article PeerReviewed 2024 ftnerc https://doi.org/10.1016/j.dsr.2024.104317 2024-06-11T23:54:48Z The mesopelagic zooplankton community plays an important role in the cycling and sequestration of carbon via the biological pump. However, little is known about the physiology and ecology of key taxa found within this region, hindering our understanding of their influence on the pathways of energy and organic matter cycling. We sampled the eight most abundant zooplankton (Calanoides acutus, Rhincalanus gigas, Paraeuchaeta spp., Chaetognatha, Euphausia triacantha, Thysanoessa spp., Themisto gaudichaudii and Salpa thompsoni) from within the mesopelagic zone in the Scotia Sea during a sinking diatom bloom and investigated their physiological ecology using lipid biomarkers and stable isotopic signatures of nitrogen. Data suggest that the large calanoid copepods, C. acutus and R. gigas, were in, or emerging from, a period of metabolic inactivity during the study period (November 15th – December 15th 2017). Abundant, but decreasing lipid reserves in the predominantly herbivorous calanoid copepods, suggest these animals may have been metabolising previously stored lipids at the time of sampling, rather than deriving energy solely from the diatom bloom. This highlights the importance of understanding the timing of diapause of overwintering species as their feeding is likely to have an impact on the turnover of particulate organic matter (POM) in the upper mesopelagic. The δ15N signatures of POM became enriched with increasing depth, whereas all species of zooplankton except T. gaudichaudii did not. This suggests that animals were feeding on fresher, surface-derived POM, rather than reworked particles at depth, likely influencing the quantity and quality of organic matter leaving the upper mesopelagic. Our study highlights the complexity of mesopelagic food webs and suggests that the application of broad trophic functional types may lead to an incorrect understanding of ecosystem dynamics. Article in Journal/Newspaper Scotia Sea Southern Ocean Copepods Natural Environment Research Council: NERC Open Research Archive Scotia Sea Southern Ocean Deep Sea Research Part I: Oceanographic Research Papers 208 104317 |
institution |
Open Polar |
collection |
Natural Environment Research Council: NERC Open Research Archive |
op_collection_id |
ftnerc |
language |
English |
description |
The mesopelagic zooplankton community plays an important role in the cycling and sequestration of carbon via the biological pump. However, little is known about the physiology and ecology of key taxa found within this region, hindering our understanding of their influence on the pathways of energy and organic matter cycling. We sampled the eight most abundant zooplankton (Calanoides acutus, Rhincalanus gigas, Paraeuchaeta spp., Chaetognatha, Euphausia triacantha, Thysanoessa spp., Themisto gaudichaudii and Salpa thompsoni) from within the mesopelagic zone in the Scotia Sea during a sinking diatom bloom and investigated their physiological ecology using lipid biomarkers and stable isotopic signatures of nitrogen. Data suggest that the large calanoid copepods, C. acutus and R. gigas, were in, or emerging from, a period of metabolic inactivity during the study period (November 15th – December 15th 2017). Abundant, but decreasing lipid reserves in the predominantly herbivorous calanoid copepods, suggest these animals may have been metabolising previously stored lipids at the time of sampling, rather than deriving energy solely from the diatom bloom. This highlights the importance of understanding the timing of diapause of overwintering species as their feeding is likely to have an impact on the turnover of particulate organic matter (POM) in the upper mesopelagic. The δ15N signatures of POM became enriched with increasing depth, whereas all species of zooplankton except T. gaudichaudii did not. This suggests that animals were feeding on fresher, surface-derived POM, rather than reworked particles at depth, likely influencing the quantity and quality of organic matter leaving the upper mesopelagic. Our study highlights the complexity of mesopelagic food webs and suggests that the application of broad trophic functional types may lead to an incorrect understanding of ecosystem dynamics. |
format |
Article in Journal/Newspaper |
author |
Savineau, Eloise L-R Cook, Kathryn B. Blackbird, Sabena J. Stowasser, Gabriele Kiriakoulakis, Konstadinos Preece, Calum Fielding, Sophie Belcher, Anna Wolff, George A. Tarling, Geraint Mayor, Daniel |
spellingShingle |
Savineau, Eloise L-R Cook, Kathryn B. Blackbird, Sabena J. Stowasser, Gabriele Kiriakoulakis, Konstadinos Preece, Calum Fielding, Sophie Belcher, Anna Wolff, George A. Tarling, Geraint Mayor, Daniel Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
author_facet |
Savineau, Eloise L-R Cook, Kathryn B. Blackbird, Sabena J. Stowasser, Gabriele Kiriakoulakis, Konstadinos Preece, Calum Fielding, Sophie Belcher, Anna Wolff, George A. Tarling, Geraint Mayor, Daniel |
author_sort |
Savineau, Eloise L-R |
title |
Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
title_short |
Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
title_full |
Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
title_fullStr |
Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
title_full_unstemmed |
Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures |
title_sort |
investigating the physiological ecology of mesopelagic zooplankton in the scotia sea (southern ocean) using lipid and stable isotope signatures |
publisher |
Elsevier |
publishDate |
2024 |
url |
http://nora.nerc.ac.uk/id/eprint/537398/ https://nora.nerc.ac.uk/id/eprint/537398/1/1-s2.0-S0967063724000876-main.pdf https://www.sciencedirect.com/science/article/pii/S0967063724000876#da0010 |
geographic |
Scotia Sea Southern Ocean |
geographic_facet |
Scotia Sea Southern Ocean |
genre |
Scotia Sea Southern Ocean Copepods |
genre_facet |
Scotia Sea Southern Ocean Copepods |
op_relation |
https://nora.nerc.ac.uk/id/eprint/537398/1/1-s2.0-S0967063724000876-main.pdf Savineau, Eloise L-R; Cook, Kathryn B. orcid:0000-0001-8590-3011 Blackbird, Sabena J.; Stowasser, Gabriele orcid:0000-0002-0595-0772 Kiriakoulakis, Konstadinos; Preece, Calum; Fielding, Sophie orcid:0000-0002-3152-4742 Belcher, Anna orcid:0000-0002-9583-5910 Wolff, George A.; Tarling, Geraint orcid:0000-0002-3753-5899 Mayor, Daniel orcid:0000-0002-1295-0041 . 2024 Investigating the physiological ecology of mesopelagic zooplankton in the Scotia Sea (Southern Ocean) using lipid and stable isotope signatures. Deep Sea Research Part I: Oceanographic Research Papers, 208, 104317. 47, pp. https://doi.org/10.1016/j.dsr.2024.104317 <https://doi.org/10.1016/j.dsr.2024.104317> |
op_rights |
cc_by_4 |
op_doi |
https://doi.org/10.1016/j.dsr.2024.104317 |
container_title |
Deep Sea Research Part I: Oceanographic Research Papers |
container_volume |
208 |
container_start_page |
104317 |
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1802649884533194752 |