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...
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Online Access: | http://hdl.handle.net/10553/74502 https://doi.org/10.3389/feart.2020.00349 |
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ftunivlaspalmas:oai:accedacris.ulpgc.es:10553/74502 2023-05-15T17:36:36+02:00 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. 7006816204 7102553402 57194425333 16174484600 23476314200 12242847800 55636631300 2020 http://hdl.handle.net/10553/74502 https://doi.org/10.3389/feart.2020.00349 eng eng Flujos de Carbono en Un Sistema de Afloramiento Costero (Cabo Blanco, Nw de Africa). Papel Del Carbono Disuelto y en Suspension en El Contexto de la Bomba Biologica. COCA (REN20001471-C02-01-MAR) e-IMPACT (PID2019-109084RB-C2) Tropical and South Atlantic - climate-based marine ecosystem prediction for sustainable management Sustainable management of mesopelagic resources Frontiers in Earth Science 8 2296-6463 Scopus http://hdl.handle.net/10553/74502 doi:10.3389/feart.2020.00349 85090495118 Sí Frontiers in Earth Science [EISSN 2296-6463], v. 8, (Agosto 2020) 251001 Oceanografía biológica Canary Current Upwelling Region Dissolved Organic Carbon Ets Activity Mesopelagic Respiration Variability Suspended And Sinking Particulate Organic Carbon info:eu-repo/semantics/Article Article 2020 ftunivlaspalmas https://doi.org/10.3389/feart.2020.00349 2021-06-08T23:11:22Z 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. 12 1,159 2,689 Q1 Q2 Article in Journal/Newspaper North Atlantic Universidad de Las Palmas de Gran Canaria: Acceda Frontiers in Earth Science 8 |
institution |
Open Polar |
collection |
Universidad de Las Palmas de Gran Canaria: Acceda |
op_collection_id |
ftunivlaspalmas |
language |
English |
topic |
251001 Oceanografía biológica Canary Current Upwelling Region Dissolved Organic Carbon Ets Activity Mesopelagic Respiration Variability Suspended And Sinking Particulate Organic Carbon |
spellingShingle |
251001 Oceanografía biológica Canary Current Upwelling Region Dissolved Organic Carbon Ets Activity Mesopelagic Respiration Variability Suspended And Sinking Particulate Organic Carbon 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 |
topic_facet |
251001 Oceanografía biológica Canary Current Upwelling Region Dissolved Organic Carbon Ets Activity Mesopelagic Respiration Variability Suspended And Sinking Particulate Organic Carbon |
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. 12 1,159 2,689 Q1 Q2 |
author2 |
7006816204 7102553402 57194425333 16174484600 23476314200 12242847800 55636631300 |
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. |
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 |
publishDate |
2020 |
url |
http://hdl.handle.net/10553/74502 https://doi.org/10.3389/feart.2020.00349 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Earth Science [EISSN 2296-6463], v. 8, (Agosto 2020) |
op_relation |
Flujos de Carbono en Un Sistema de Afloramiento Costero (Cabo Blanco, Nw de Africa). Papel Del Carbono Disuelto y en Suspension en El Contexto de la Bomba Biologica. COCA (REN20001471-C02-01-MAR) e-IMPACT (PID2019-109084RB-C2) Tropical and South Atlantic - climate-based marine ecosystem prediction for sustainable management Sustainable management of mesopelagic resources Frontiers in Earth Science 8 2296-6463 Scopus http://hdl.handle.net/10553/74502 doi:10.3389/feart.2020.00349 85090495118 Sí |
op_doi |
https://doi.org/10.3389/feart.2020.00349 |
container_title |
Frontiers in Earth Science |
container_volume |
8 |
_version_ |
1766136131195240448 |