Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring
Zooplankton form an integral component of epi- and mesopelagic ecosystems, and there is a need to better understand their role in ocean biogeochemistry. The export and remineralisation of particulate organic matter at depth plays an important role in controlling atmospheric CO2 concentrations. Pelag...
Published in: | Deep Sea Research Part II: Topical Studies in Oceanography |
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Main Authors: | , , , , , , , , , , |
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Format: | Article in Journal/Newspaper |
Language: | English |
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2023
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Online Access: | http://hdl.handle.net/10553/123335 https://doi.org/10.1016/j.dsr2.2023.105296 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/123335 2023-07-16T04:00:47+02:00 Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring Cook, Kathryn B. Belcher, Anna Bondyale Juez, Daniel Rickue Stowasser, Gabriele Fielding, Sophie Saunders, Ryan A. Elsafi, Mohamed A. Wolff, George A. Blackbird, Sabena J. Tarling, Geraint A. Mayor, Daniel J. orcid:0000-0001-8590-3011 NO DATA 20336870400 57119292900 58266784800 57203673125 58266627500 36723452800 57218645731 57203196534 22833262200 6603871534 36801878300 BU-BAS 2023 http://hdl.handle.net/10553/123335 https://doi.org/10.1016/j.dsr2.2023.105296 eng eng Deep-Sea Research Part II: Topical Studies in Oceanography 210 0967-0645 Scopus http://hdl.handle.net/10553/123335 doi:10.1016/j.dsr2.2023.105296 85159775074 Sí Deep-Sea Research Part II: Topical Studies in Oceanography [ISSN 0967-0645], v. 210, 105296, (Agosto 2023) 251001 Oceanografía biológica 251008 Interacciones mar-aire Biological Gravitational Pump Carbon Ingestion Lipids Micronekton Respiration Scotia Sea Zooplankton info:eu-repo/semantics/Article Article 2023 ftunivlaspalmas https://doi.org/10.1016/j.dsr2.2023.105296 2023-06-27T23:15:19Z Zooplankton form an integral component of epi- and mesopelagic ecosystems, and there is a need to better understand their role in ocean biogeochemistry. The export and remineralisation of particulate organic matter at depth plays an important role in controlling atmospheric CO2 concentrations. Pelagic mesozooplankton and micronekton communities may influence the fate of organic matter in a number of ways, including: the consumption of primary producers and export of this material as fast-sinking faecal pellets, and the active flux of carbon by animals undertaking diel vertical migration (DVM) into the mesopelagic. We present day and night vertical biomass profiles of mesozooplankton and micronekton communities in the upper 500 m during three visits to an ocean observatory station (P3) to the NW of South Georgia (Scotia Sea, South Atlantic) in austral spring, alongside estimates of their daily rates of ingestion and respiration throughout the water column. Day and night community biomass estimates were dominated by copepods >330 μm, including the lipid-rich species, Calanoides acutus and Rhincalanus gigas. We found little evidence of synchronised DVM, with only Metridia spp. and Salpa thompsoni showing patterns consistent with migratory behaviour. At depths below 250 m, estimated community carbon ingestion rates exceeded those of metabolic costs, supporting the understanding that food quality in the mesopelagic is relatively poor, and organisms have to consume a large amount of food in order to fulfil their nutritional requirements. By contrast, estimated community rates of ingestion and metabolic costs at shallower depths were approximately balanced, but only when we assumed that the animals were predominantly catabolising lipids (i.e. respiratory quotient = 0.7) and had relatively high absorption efficiencies. Our work demonstrates that it is possible to balance the metabolic budgets of mesopelagic animals to within observational uncertainties, but highlights the need for a better understanding of the ... Article in Journal/Newspaper Scotia Sea Copepods Universidad de Las Palmas de Gran Canaria: Acceda Austral Scotia Sea Deep Sea Research Part II: Topical Studies in Oceanography 210 105296 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica 251008 Interacciones mar-aire Biological Gravitational Pump Carbon Ingestion Lipids Micronekton Respiration Scotia Sea Zooplankton |
spellingShingle |
251001 Oceanografía biológica 251008 Interacciones mar-aire Biological Gravitational Pump Carbon Ingestion Lipids Micronekton Respiration Scotia Sea Zooplankton Cook, Kathryn B. Belcher, Anna Bondyale Juez, Daniel Rickue Stowasser, Gabriele Fielding, Sophie Saunders, Ryan A. Elsafi, Mohamed A. Wolff, George A. Blackbird, Sabena J. Tarling, Geraint A. Mayor, Daniel J. Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
topic_facet |
251001 Oceanografía biológica 251008 Interacciones mar-aire Biological Gravitational Pump Carbon Ingestion Lipids Micronekton Respiration Scotia Sea Zooplankton |
description |
Zooplankton form an integral component of epi- and mesopelagic ecosystems, and there is a need to better understand their role in ocean biogeochemistry. The export and remineralisation of particulate organic matter at depth plays an important role in controlling atmospheric CO2 concentrations. Pelagic mesozooplankton and micronekton communities may influence the fate of organic matter in a number of ways, including: the consumption of primary producers and export of this material as fast-sinking faecal pellets, and the active flux of carbon by animals undertaking diel vertical migration (DVM) into the mesopelagic. We present day and night vertical biomass profiles of mesozooplankton and micronekton communities in the upper 500 m during three visits to an ocean observatory station (P3) to the NW of South Georgia (Scotia Sea, South Atlantic) in austral spring, alongside estimates of their daily rates of ingestion and respiration throughout the water column. Day and night community biomass estimates were dominated by copepods >330 μm, including the lipid-rich species, Calanoides acutus and Rhincalanus gigas. We found little evidence of synchronised DVM, with only Metridia spp. and Salpa thompsoni showing patterns consistent with migratory behaviour. At depths below 250 m, estimated community carbon ingestion rates exceeded those of metabolic costs, supporting the understanding that food quality in the mesopelagic is relatively poor, and organisms have to consume a large amount of food in order to fulfil their nutritional requirements. By contrast, estimated community rates of ingestion and metabolic costs at shallower depths were approximately balanced, but only when we assumed that the animals were predominantly catabolising lipids (i.e. respiratory quotient = 0.7) and had relatively high absorption efficiencies. Our work demonstrates that it is possible to balance the metabolic budgets of mesopelagic animals to within observational uncertainties, but highlights the need for a better understanding of the ... |
author2 |
orcid:0000-0001-8590-3011 NO DATA 20336870400 57119292900 58266784800 57203673125 58266627500 36723452800 57218645731 57203196534 22833262200 6603871534 36801878300 BU-BAS |
format |
Article in Journal/Newspaper |
author |
Cook, Kathryn B. Belcher, Anna Bondyale Juez, Daniel Rickue Stowasser, Gabriele Fielding, Sophie Saunders, Ryan A. Elsafi, Mohamed A. Wolff, George A. Blackbird, Sabena J. Tarling, Geraint A. Mayor, Daniel J. |
author_facet |
Cook, Kathryn B. Belcher, Anna Bondyale Juez, Daniel Rickue Stowasser, Gabriele Fielding, Sophie Saunders, Ryan A. Elsafi, Mohamed A. Wolff, George A. Blackbird, Sabena J. Tarling, Geraint A. Mayor, Daniel J. |
author_sort |
Cook, Kathryn B. |
title |
Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
title_short |
Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
title_full |
Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
title_fullStr |
Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
title_full_unstemmed |
Carbon budgets of Scotia Sea mesopelagic zooplankton and micronekton communities during austral spring |
title_sort |
carbon budgets of scotia sea mesopelagic zooplankton and micronekton communities during austral spring |
publishDate |
2023 |
url |
http://hdl.handle.net/10553/123335 https://doi.org/10.1016/j.dsr2.2023.105296 |
geographic |
Austral Scotia Sea |
geographic_facet |
Austral Scotia Sea |
genre |
Scotia Sea Copepods |
genre_facet |
Scotia Sea Copepods |
op_source |
Deep-Sea Research Part II: Topical Studies in Oceanography [ISSN 0967-0645], v. 210, 105296, (Agosto 2023) |
op_relation |
Deep-Sea Research Part II: Topical Studies in Oceanography 210 0967-0645 Scopus http://hdl.handle.net/10553/123335 doi:10.1016/j.dsr2.2023.105296 85159775074 Sí |
op_doi |
https://doi.org/10.1016/j.dsr2.2023.105296 |
container_title |
Deep Sea Research Part II: Topical Studies in Oceanography |
container_volume |
210 |
container_start_page |
105296 |
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1771549964728532992 |