Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
The annual North Atlantic phytoplankton bloom represents a hot spot of biological activity during which a significant fraction of net community production (NCP) can be partitioned into dissolved organic carbon (DOC). The fraction of seasonal NCP that is not respired by the heterotrophic bacterial co...
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ftdoajarticles:oai:doaj.org/article:01938471aec0455c9afb33326747a429 2023-05-15T17:25:55+02:00 Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic Nicholas Baetge Jason R. Graff Michael J. Behrenfeld Craig A. Carlson 2020-04-01T00:00:00Z https://doi.org/10.3389/fmars.2020.00227 https://doaj.org/article/01938471aec0455c9afb33326747a429 EN eng Frontiers Media S.A. https://www.frontiersin.org/article/10.3389/fmars.2020.00227/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00227 https://doaj.org/article/01938471aec0455c9afb33326747a429 Frontiers in Marine Science, Vol 7 (2020) North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export Science Q General. Including nature conservation geographical distribution QH1-199.5 article 2020 ftdoajarticles https://doi.org/10.3389/fmars.2020.00227 2022-12-31T12:14:42Z The annual North Atlantic phytoplankton bloom represents a hot spot of biological activity during which a significant fraction of net community production (NCP) can be partitioned into dissolved organic carbon (DOC). The fraction of seasonal NCP that is not respired by the heterotrophic bacterial community and accumulates as seasonal surplus DOC (ΔDOC) in the surface layer represents DOC export potential to the upper mesopelagic zone, and in the North Atlantic this is facilitated by winter convective mixing that can extend to depths > 400 m. However, estimates of ΔDOC and vertical DOC export for the western North Atlantic remain ill-constrained and the influence of phytoplankton community structure on the partitioning of seasonal NCP as ΔDOC is unresolved. Here, we couple hydrographic properties from autonomous in situ sensors (ARGO floats) with biogeochemical data from two meridional transects in the late spring (∼44–56°N along ∼−41°W) and early autumn (∼42–53°N along ∼−41°W) as part of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES). We estimate that 4–35% of seasonal NCP is partitioned as ΔDOC and that annual vertical DOC export ranges between 0.34 and 1.15 mol C m–2 in the temperate and subpolar western North Atlantic. Two lines of evidence reveal that non-siliceous picophytoplankton, like Prochlorococcus, are indicator species of the conditions that control the accumulation of DOC and the partitioning of NCP as ΔDOC. Article in Journal/Newspaper North Atlantic Directory of Open Access Journals: DOAJ Articles Frontiers in Marine Science 7 |
institution |
Open Polar |
collection |
Directory of Open Access Journals: DOAJ Articles |
op_collection_id |
ftdoajarticles |
language |
English |
topic |
North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export Science Q General. Including nature conservation geographical distribution QH1-199.5 |
spellingShingle |
North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export Science Q General. Including nature conservation geographical distribution QH1-199.5 Nicholas Baetge Jason R. Graff Michael J. Behrenfeld Craig A. Carlson Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
topic_facet |
North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export Science Q General. Including nature conservation geographical distribution QH1-199.5 |
description |
The annual North Atlantic phytoplankton bloom represents a hot spot of biological activity during which a significant fraction of net community production (NCP) can be partitioned into dissolved organic carbon (DOC). The fraction of seasonal NCP that is not respired by the heterotrophic bacterial community and accumulates as seasonal surplus DOC (ΔDOC) in the surface layer represents DOC export potential to the upper mesopelagic zone, and in the North Atlantic this is facilitated by winter convective mixing that can extend to depths > 400 m. However, estimates of ΔDOC and vertical DOC export for the western North Atlantic remain ill-constrained and the influence of phytoplankton community structure on the partitioning of seasonal NCP as ΔDOC is unresolved. Here, we couple hydrographic properties from autonomous in situ sensors (ARGO floats) with biogeochemical data from two meridional transects in the late spring (∼44–56°N along ∼−41°W) and early autumn (∼42–53°N along ∼−41°W) as part of the North Atlantic Aerosols and Marine Ecosystems Study (NAAMES). We estimate that 4–35% of seasonal NCP is partitioned as ΔDOC and that annual vertical DOC export ranges between 0.34 and 1.15 mol C m–2 in the temperate and subpolar western North Atlantic. Two lines of evidence reveal that non-siliceous picophytoplankton, like Prochlorococcus, are indicator species of the conditions that control the accumulation of DOC and the partitioning of NCP as ΔDOC. |
format |
Article in Journal/Newspaper |
author |
Nicholas Baetge Jason R. Graff Michael J. Behrenfeld Craig A. Carlson |
author_facet |
Nicholas Baetge Jason R. Graff Michael J. Behrenfeld Craig A. Carlson |
author_sort |
Nicholas Baetge |
title |
Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
title_short |
Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
title_full |
Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
title_fullStr |
Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
title_full_unstemmed |
Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic |
title_sort |
net community production, dissolved organic carbon accumulation, and vertical export in the western north atlantic |
publisher |
Frontiers Media S.A. |
publishDate |
2020 |
url |
https://doi.org/10.3389/fmars.2020.00227 https://doaj.org/article/01938471aec0455c9afb33326747a429 |
genre |
North Atlantic |
genre_facet |
North Atlantic |
op_source |
Frontiers in Marine Science, Vol 7 (2020) |
op_relation |
https://www.frontiersin.org/article/10.3389/fmars.2020.00227/full https://doaj.org/toc/2296-7745 2296-7745 doi:10.3389/fmars.2020.00227 https://doaj.org/article/01938471aec0455c9afb33326747a429 |
op_doi |
https://doi.org/10.3389/fmars.2020.00227 |
container_title |
Frontiers in Marine Science |
container_volume |
7 |
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1766117436051947520 |