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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Gespeichert in:

Autor*in:	Nicholas Baetge [verfasserIn] Jason R. Graff [verfasserIn] Michael J. Behrenfeld [verfasserIn] Craig A. Carlson [verfasserIn]

Format:	E-Artikel
Sprache:	Englisch

Erschienen:	2020

Schlagwörter:	North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export

Übergeordnetes Werk:	In: Frontiers in Marine Science - Frontiers Media S.A., 2015, 7(2020)
Übergeordnetes Werk:	volume:7 ; year:2020

Links:	Link aufrufen Link aufrufen Link aufrufen Journal toc

DOI / URN:	10.3389/fmars.2020.00227

Katalog-ID:	DOAJ001181726

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520			\|a 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.
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allfieldsSound	10.3389/fmars.2020.00227 doi (DE-627)DOAJ001181726 (DE-599)DOAJ01938471aec0455c9afb33326747a429 DE-627 ger DE-627 rakwb eng QH1-199.5 Nicholas Baetge verfasserin aut Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic 2020 Text txt rdacontent Computermedien c rdamedia Online-Ressource cr rdacarrier 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. 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 Jason R. Graff verfasserin aut Michael J. Behrenfeld verfasserin aut Craig A. Carlson verfasserin aut In Frontiers in Marine Science Frontiers Media S.A., 2015 7(2020) (DE-627)779393945 (DE-600)2757748-X 22967745 nnns volume:7 year:2020 https://doi.org/10.3389/fmars.2020.00227 kostenfrei https://doaj.org/article/01938471aec0455c9afb33326747a429 kostenfrei https://www.frontiersin.org/article/10.3389/fmars.2020.00227/full kostenfrei https://doaj.org/toc/2296-7745 Journal toc kostenfrei GBV_USEFLAG_A SYSFLAG_A GBV_DOAJ GBV_ILN_11 GBV_ILN_20 GBV_ILN_22 GBV_ILN_23 GBV_ILN_24 GBV_ILN_31 GBV_ILN_39 GBV_ILN_40 GBV_ILN_60 GBV_ILN_62 GBV_ILN_63 GBV_ILN_65 GBV_ILN_69 GBV_ILN_70 GBV_ILN_73 GBV_ILN_95 GBV_ILN_105 GBV_ILN_110 GBV_ILN_151 GBV_ILN_161 GBV_ILN_170 GBV_ILN_213 GBV_ILN_230 GBV_ILN_285 GBV_ILN_293 GBV_ILN_370 GBV_ILN_602 GBV_ILN_2003 GBV_ILN_2014 GBV_ILN_4012 GBV_ILN_4037 GBV_ILN_4112 GBV_ILN_4125 GBV_ILN_4126 GBV_ILN_4249 GBV_ILN_4305 GBV_ILN_4306 GBV_ILN_4307 GBV_ILN_4313 GBV_ILN_4322 GBV_ILN_4323 GBV_ILN_4324 GBV_ILN_4325 GBV_ILN_4338 GBV_ILN_4367 GBV_ILN_4700 AR 7 2020
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authorswithroles_txt_mv	Nicholas Baetge @@aut@@ Jason R. Graff @@aut@@ Michael J. Behrenfeld @@aut@@ Craig A. Carlson @@aut@@
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author	Nicholas Baetge
spellingShingle	Nicholas Baetge misc QH1-199.5 misc North Atlantic Aerosols and Marine Ecosystems Study misc net community production misc dissolved organic carbon misc ARGO misc convective overturn misc vertical export misc Science misc Q misc General. Including nature conservation, geographical distribution Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
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topic_title	QH1-199.5 Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic North Atlantic Aerosols and Marine Ecosystems Study net community production dissolved organic carbon ARGO convective overturn vertical export
topic	misc QH1-199.5 misc North Atlantic Aerosols and Marine Ecosystems Study misc net community production misc dissolved organic carbon misc ARGO misc convective overturn misc vertical export misc Science misc Q misc General. Including nature conservation, geographical distribution
topic_unstemmed	misc QH1-199.5 misc North Atlantic Aerosols and Marine Ecosystems Study misc net community production misc dissolved organic carbon misc ARGO misc convective overturn misc vertical export misc Science misc Q misc General. Including nature conservation, geographical distribution
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title	Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
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title_full	Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
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title_sort	net community production, dissolved organic carbon accumulation, and vertical export in the western north atlantic
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title_auth	Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
abstract	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.
abstractGer	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.
abstract_unstemmed	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.
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title_short	Net Community Production, Dissolved Organic Carbon Accumulation, and Vertical Export in the Western North Atlantic
url	https://doi.org/10.3389/fmars.2020.00227 https://doaj.org/article/01938471aec0455c9afb33326747a429 https://www.frontiersin.org/article/10.3389/fmars.2020.00227/full https://doaj.org/toc/2296-7745
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