Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region
Plankton respiration (R) is a key factor governing the ocean carbon cycle. However, although the ocean supports respiratory activity throughout its entire volume, to our knowledge there are no studies that tackle both the spatial and temporal variability of respiration in the dark ocean and its depe...
Published in: | Frontiers in Earth Science |
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Main Authors: | , , , , , , |
Other Authors: | , , , , , , |
Format: | Article in Journal/Newspaper |
Language: | unknown |
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Frontiers Media SA
2020
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Online Access: | http://hdl.handle.net/10754/665182 https://doi.org/10.3389/feart.2020.00349 |
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Open Polar |
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King Abdullah University of Science and Technology: KAUST Repository |
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ftkingabdullahun |
language |
unknown |
description |
Plankton respiration (R) is a key factor governing the ocean carbon cycle. However, although the ocean supports respiratory activity throughout its entire volume, to our knowledge there are no studies that tackle both the spatial and temporal variability of respiration in the dark ocean and its dependence on organic carbon sources. Here, we have studied the variability of epipelagic and mesopelagic R via the enzymatic activity of the electron transport system (ETS) in microbial communities, along two zonal sections (21°N and 26°N) extending from the northwest African coastal upwelling to the open-ocean waters of the North Atlantic subtropical gyre, during the fall 2002 and the spring 2003. Overall, integrated R in epipelagic (Repi; 0–200 m) waters, was similar during the two periods, while integrated mesopelagic respiration (Rmeso; 200–1000 m) was >25% higher in the fall. The two seasons, however, exhibited contrasting zonal and meridional patterns of ETS distribution in the water column, largely influenced by upwelling effects and associated mesoscale variability. Multiple linear regression between average R and average concentrations of dissolved organic carbon (DOC) and slow-sinking (suspended) particulate organic carbon (POCsus) indicates that POCsus is the main contributor to Rmeso, supporting previous results in the same area. Rmeso exceeded satellite-derived net primary production (NPP) at all stations except at the most coastal ones, with the imbalance increasing offshore. Moreover, the export flux of sinking POC collected at 200 m with sediment traps, represented on average less than 6% of the NPP. All this indicates that Rmeso depends largely on small particles with low sinking rates, which would be laterally advected at mid water depths from the continental margin toward the open ocean, or transported by mesoscale features from the surface to the mesopelagic ocean, providing support to inferences from modeling studies in the region. We thank the captain, crew, and technical staff of the B.I.O ... |
author2 |
Biological and Environmental Sciences and Engineering (BESE) Division Marine Science Program Red Sea Research Center (RSRC) Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain OCEOMIC, Marine Bio and Technology S.L., Parque Tecnológico de Fuerteventura, Puerto del Rosario, Spain Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Department of Climate Geochemistry, Max Planck Institute for Chemistry, Mainz, Germany |
format |
Article in Journal/Newspaper |
author |
Arístegui, Javier Montero, María F. Hernández-Hernández, Nauzet Alonso-González, Iván J. Baltar, Federico Calleja, Maria Ll Duarte, Carlos M. |
spellingShingle |
Arístegui, Javier Montero, María F. Hernández-Hernández, Nauzet Alonso-González, Iván J. Baltar, Federico Calleja, Maria Ll Duarte, Carlos M. Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
author_facet |
Arístegui, Javier Montero, María F. Hernández-Hernández, Nauzet Alonso-González, Iván J. Baltar, Federico Calleja, Maria Ll Duarte, Carlos M. |
author_sort |
Arístegui, Javier |
title |
Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
title_short |
Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
title_full |
Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
title_fullStr |
Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
title_full_unstemmed |
Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region |
title_sort |
variability in water-column respiration and its dependence on organic carbon sources in the canary current upwelling region |
publisher |
Frontiers Media SA |
publishDate |
2020 |
url |
http://hdl.handle.net/10754/665182 https://doi.org/10.3389/feart.2020.00349 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_relation |
DOI:10.1594/pangaea.930838 https://www.frontiersin.org/article/10.3389/feart.2020.00349/full Arístegui, J., Montero, M. F., Hernández-Hernández, N., Alonso-González, I. J., Baltar, F., Calleja, M. L., & Duarte, C. M. (2020). Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region. Frontiers in Earth Science, 8. doi:10.3389/feart.2020.00349 doi:10.3389/feart.2020.00349 2-s2.0-85090495118 2296-6463 Frontiers in Earth Science http://hdl.handle.net/10754/665182 8 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. https://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.3389/feart.2020.0034910.1594/pangaea.930838 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1787426748638429184 |
spelling |
ftkingabdullahun:oai:repository.kaust.edu.sa:10754/665182 2024-01-07T09:45:16+01:00 Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region Arístegui, Javier Montero, María F. Hernández-Hernández, Nauzet Alonso-González, Iván J. Baltar, Federico Calleja, Maria Ll Duarte, Carlos M. Biological and Environmental Sciences and Engineering (BESE) Division Marine Science Program Red Sea Research Center (RSRC) Instituto de Oceanografía y Cambio Global, IOCAG, Universidad de Las Palmas de Gran Canaria, Las Palmas de Gran Canaria, Spain OCEOMIC, Marine Bio and Technology S.L., Parque Tecnológico de Fuerteventura, Puerto del Rosario, Spain Department of Functional and Evolutionary Ecology, University of Vienna, Vienna, Austria Department of Climate Geochemistry, Max Planck Institute for Chemistry, Mainz, Germany 2020-09-16T11:11:23Z application/pdf http://hdl.handle.net/10754/665182 https://doi.org/10.3389/feart.2020.00349 unknown Frontiers Media SA DOI:10.1594/pangaea.930838 https://www.frontiersin.org/article/10.3389/feart.2020.00349/full Arístegui, J., Montero, M. F., Hernández-Hernández, N., Alonso-González, I. J., Baltar, F., Calleja, M. L., & Duarte, C. M. (2020). Variability in Water-Column Respiration and Its Dependence on Organic Carbon Sources in the Canary Current Upwelling Region. Frontiers in Earth Science, 8. doi:10.3389/feart.2020.00349 doi:10.3389/feart.2020.00349 2-s2.0-85090495118 2296-6463 Frontiers in Earth Science http://hdl.handle.net/10754/665182 8 This is an open-access article distributed under the terms of the Creative Commons Attribution License (CC BY). The use, distribution or reproduction in other forums is permitted, provided the original author(s) and the copyright owner(s) are credited and that the original publication in this journal is cited, in accordance with accepted academic practice. No use, distribution or reproduction is permitted which does not comply with these terms. https://creativecommons.org/licenses/by/4.0/ Article 2020 ftkingabdullahun https://doi.org/10.3389/feart.2020.0034910.1594/pangaea.930838 2023-12-09T20:18:59Z Plankton respiration (R) is a key factor governing the ocean carbon cycle. However, although the ocean supports respiratory activity throughout its entire volume, to our knowledge there are no studies that tackle both the spatial and temporal variability of respiration in the dark ocean and its dependence on organic carbon sources. Here, we have studied the variability of epipelagic and mesopelagic R via the enzymatic activity of the electron transport system (ETS) in microbial communities, along two zonal sections (21°N and 26°N) extending from the northwest African coastal upwelling to the open-ocean waters of the North Atlantic subtropical gyre, during the fall 2002 and the spring 2003. Overall, integrated R in epipelagic (Repi; 0–200 m) waters, was similar during the two periods, while integrated mesopelagic respiration (Rmeso; 200–1000 m) was >25% higher in the fall. The two seasons, however, exhibited contrasting zonal and meridional patterns of ETS distribution in the water column, largely influenced by upwelling effects and associated mesoscale variability. Multiple linear regression between average R and average concentrations of dissolved organic carbon (DOC) and slow-sinking (suspended) particulate organic carbon (POCsus) indicates that POCsus is the main contributor to Rmeso, supporting previous results in the same area. Rmeso exceeded satellite-derived net primary production (NPP) at all stations except at the most coastal ones, with the imbalance increasing offshore. Moreover, the export flux of sinking POC collected at 200 m with sediment traps, represented on average less than 6% of the NPP. All this indicates that Rmeso depends largely on small particles with low sinking rates, which would be laterally advected at mid water depths from the continental margin toward the open ocean, or transported by mesoscale features from the surface to the mesopelagic ocean, providing support to inferences from modeling studies in the region. We thank the captain, crew, and technical staff of the B.I.O ... Article in Journal/Newspaper North Atlantic King Abdullah University of Science and Technology: KAUST Repository Frontiers in Earth Science 8 |