Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus
In the Arctic Ocean, increased sea surface temperature and sea ice retreat have triggered shifts in phytoplankton communities. In Fram Strait, coccolithophorids have been occasionally observed to replace diatoms as the dominating taxon of spring blooms. Deep-sea benthic communities depend strongly o...
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Language: | English |
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2018
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ftvliz:oai:oma.vliz.be:307887 2023-05-15T14:52:34+02:00 Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus Braeckman, U. Janssen, F. Lavik, G. Elvert, M. Marchant, H. Buckner, C. Bienhold, C. Wenzhöfer, F. 2018 application/pdf https://www.vliz.be/imisdocs/publications/326245.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000449481500001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/bg-15-6537-2018 https://www.vliz.be/imisdocs/publications/326245.pdf info:eu-repo/semantics/openAccess %3Ci%3EBiogeosciences+15%2821%29%3C%2Fi%3E%3A+6537-6557.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.5194%2Fbg-15-6537-2018%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.5194%2Fbg-15-6537-2018%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftvliz https://doi.org/10.5194/bg-15-6537-2018 2022-05-01T11:16:49Z In the Arctic Ocean, increased sea surface temperature and sea ice retreat have triggered shifts in phytoplankton communities. In Fram Strait, coccolithophorids have been occasionally observed to replace diatoms as the dominating taxon of spring blooms. Deep-sea benthic communities depend strongly on such blooms, but with a change in quality and quantity of primarily produced organic matter (OM) input, this may likely have implications for deep-sea life. We compared the in situ responses of Arctic deep-sea benthos to input of phytodetritus from a diatom ( Thalassiosira sp.) and a coccolithophorid ( Emiliania huxleyi ) species. We traced the fate of 13 C - and 15 N -labelled phytodetritus into respiration, assimilation by bacteria and infauna in a 4-day and 14-day experiment. Bacteria were key assimilators in the Thalassiosira OM degradation, whereas Foraminifera and other infauna were at least as important as bacteria in the Emiliania OM assimilation. After 14days, 5times less carbon and 3.8times less nitrogen of the Emiliania detritus was recycled compared to Thalassiosira detritus. This implies that the utilization of Emiliania OM may be less efficient than for Thalassiosira OM. Our results indicate that a shift from diatom-dominated input to a coccolithophorid-dominated pulse could entail a delay in OM cycling, which may affect benthopelagic coupling. Article in Journal/Newspaper Arctic Arctic Ocean Foraminifera* Fram Strait Phytoplankton Sea ice Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) Arctic Arctic Ocean Biogeosciences 15 21 6537 6557 |
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Open Polar |
collection |
Flanders Marine Institute (VLIZ): Open Marine Archive (OMA) |
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ftvliz |
language |
English |
description |
In the Arctic Ocean, increased sea surface temperature and sea ice retreat have triggered shifts in phytoplankton communities. In Fram Strait, coccolithophorids have been occasionally observed to replace diatoms as the dominating taxon of spring blooms. Deep-sea benthic communities depend strongly on such blooms, but with a change in quality and quantity of primarily produced organic matter (OM) input, this may likely have implications for deep-sea life. We compared the in situ responses of Arctic deep-sea benthos to input of phytodetritus from a diatom ( Thalassiosira sp.) and a coccolithophorid ( Emiliania huxleyi ) species. We traced the fate of 13 C - and 15 N -labelled phytodetritus into respiration, assimilation by bacteria and infauna in a 4-day and 14-day experiment. Bacteria were key assimilators in the Thalassiosira OM degradation, whereas Foraminifera and other infauna were at least as important as bacteria in the Emiliania OM assimilation. After 14days, 5times less carbon and 3.8times less nitrogen of the Emiliania detritus was recycled compared to Thalassiosira detritus. This implies that the utilization of Emiliania OM may be less efficient than for Thalassiosira OM. Our results indicate that a shift from diatom-dominated input to a coccolithophorid-dominated pulse could entail a delay in OM cycling, which may affect benthopelagic coupling. |
format |
Article in Journal/Newspaper |
author |
Braeckman, U. Janssen, F. Lavik, G. Elvert, M. Marchant, H. Buckner, C. Bienhold, C. Wenzhöfer, F. |
spellingShingle |
Braeckman, U. Janssen, F. Lavik, G. Elvert, M. Marchant, H. Buckner, C. Bienhold, C. Wenzhöfer, F. Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
author_facet |
Braeckman, U. Janssen, F. Lavik, G. Elvert, M. Marchant, H. Buckner, C. Bienhold, C. Wenzhöfer, F. |
author_sort |
Braeckman, U. |
title |
Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
title_short |
Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
title_full |
Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
title_fullStr |
Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
title_full_unstemmed |
Carbon and nitrogen turnover in the Arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
title_sort |
carbon and nitrogen turnover in the arctic deep sea: in situ benthic community response to diatom and coccolithophorid phytodetritus |
publishDate |
2018 |
url |
https://www.vliz.be/imisdocs/publications/326245.pdf |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Foraminifera* Fram Strait Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Foraminifera* Fram Strait Phytoplankton Sea ice |
op_source |
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op_relation |
info:eu-repo/semantics/altIdentifier/wos/000449481500001 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.5194/bg-15-6537-2018 https://www.vliz.be/imisdocs/publications/326245.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-15-6537-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
21 |
container_start_page |
6537 |
op_container_end_page |
6557 |
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1766323805064527872 |