Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth
Arctic Ocean surface sea-ice conditions are linked with the deep sea benthic oxygen fluxes via a cascade of interdependencies across ecosystem components such as primary production, food supply, activity of the benthic community, and their functions. Additionally, each ecosystem component is influen...
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ftunivgent:oai:archive.ugent.be:8606825 2023-06-11T04:09:09+02:00 Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth Hoffmann, Ralf Braeckman, Ulrike Hasemann, Christiane Wenzhöfer, Frank 2018 application/pdf https://biblio.ugent.be/publication/8606825 http://hdl.handle.net/1854/LU-8606825 https://doi.org/10.5194/bg-15-4849-2018 https://biblio.ugent.be/publication/8606825/file/8606826 eng eng https://biblio.ugent.be/publication/8606825 http://hdl.handle.net/1854/LU-8606825 http://dx.doi.org/10.5194/bg-15-4849-2018 https://biblio.ugent.be/publication/8606825/file/8606826 Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess BIOGEOSCIENCES ISSN: 1726-4170 ISSN: 1726-4189 Biology and Life Sciences Earth and Environmental Sciences ORGANIC-MATTER IN-SITU VERTICAL-DISTRIBUTION PHYTOPLANKTON BLOOMS PARTICULATE MATTER MICROBIAL BIOMASS SURFACE SEDIMENTS ATLANTIC WATER CLIMATE-CHANGE OCEAN journalArticle info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2018 ftunivgent https://doi.org/10.5194/bg-15-4849-2018 2023-05-10T22:36:21Z Arctic Ocean surface sea-ice conditions are linked with the deep sea benthic oxygen fluxes via a cascade of interdependencies across ecosystem components such as primary production, food supply, activity of the benthic community, and their functions. Additionally, each ecosystem component is influenced by abiotic factors such as light availability, temperature, water depth, and grain size structure. In this study, we investigated the coupling between surface sea-ice conditions and deep-sea benthic remineralization processes through a cascade of interdependencies in the Fram Strait. We measured sea-ice concentrations, a variety of different sediment characteristics, benthic community parameters, and oxygen fluxes at 12 stations of the LTER HAUSGARTEN observatory, Fram Strait, at water depths of 275-2500 m. Our investigations reveal that the Fram Strait is bisected into two long-lasting and stable regions: (i) a permanently and highly sea-ice-covered area and (ii) a seasonally and low sea-icecovered area. Within the Fram Strait ecosystem, sea-ice concentration and water depth are two independent abiotic factors, controlling the deep-sea benthos. Sea-ice concentration correlated with the available food and water depth with the oxygen flux. In addition, both abiotic factors sea-ice concentration and water depth correlate with the macrofauna biomass. However, at water depths > 1500m the influence of the surface sea-ice cover is minimal with water depth becoming more dominant. Benthic remineralization across the Fram Strait on average is similar to 1 mmol C m(-2)d(-1). Our data indicate that the portion of newly produced carbon that is remineralized by the benthos is 5 % in the seasonally low seaice-covered eastern part of Fram Strait but can be 14 % in the permanently high sea-ice-covered western part of Fram Strait. Here, by comparing a permanently sea-ice-covered area with a seasonally sea-ice-covered area, we discuss a potential scenario for the deep-sea benthic ecosystem in the future Arctic Ocean, in which an ... Article in Journal/Newspaper Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice Ghent University Academic Bibliography Arctic Arctic Ocean Biogeosciences 15 16 4849 4869 |
institution |
Open Polar |
collection |
Ghent University Academic Bibliography |
op_collection_id |
ftunivgent |
language |
English |
topic |
Biology and Life Sciences Earth and Environmental Sciences ORGANIC-MATTER IN-SITU VERTICAL-DISTRIBUTION PHYTOPLANKTON BLOOMS PARTICULATE MATTER MICROBIAL BIOMASS SURFACE SEDIMENTS ATLANTIC WATER CLIMATE-CHANGE OCEAN |
spellingShingle |
Biology and Life Sciences Earth and Environmental Sciences ORGANIC-MATTER IN-SITU VERTICAL-DISTRIBUTION PHYTOPLANKTON BLOOMS PARTICULATE MATTER MICROBIAL BIOMASS SURFACE SEDIMENTS ATLANTIC WATER CLIMATE-CHANGE OCEAN Hoffmann, Ralf Braeckman, Ulrike Hasemann, Christiane Wenzhöfer, Frank Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
topic_facet |
Biology and Life Sciences Earth and Environmental Sciences ORGANIC-MATTER IN-SITU VERTICAL-DISTRIBUTION PHYTOPLANKTON BLOOMS PARTICULATE MATTER MICROBIAL BIOMASS SURFACE SEDIMENTS ATLANTIC WATER CLIMATE-CHANGE OCEAN |
description |
Arctic Ocean surface sea-ice conditions are linked with the deep sea benthic oxygen fluxes via a cascade of interdependencies across ecosystem components such as primary production, food supply, activity of the benthic community, and their functions. Additionally, each ecosystem component is influenced by abiotic factors such as light availability, temperature, water depth, and grain size structure. In this study, we investigated the coupling between surface sea-ice conditions and deep-sea benthic remineralization processes through a cascade of interdependencies in the Fram Strait. We measured sea-ice concentrations, a variety of different sediment characteristics, benthic community parameters, and oxygen fluxes at 12 stations of the LTER HAUSGARTEN observatory, Fram Strait, at water depths of 275-2500 m. Our investigations reveal that the Fram Strait is bisected into two long-lasting and stable regions: (i) a permanently and highly sea-ice-covered area and (ii) a seasonally and low sea-icecovered area. Within the Fram Strait ecosystem, sea-ice concentration and water depth are two independent abiotic factors, controlling the deep-sea benthos. Sea-ice concentration correlated with the available food and water depth with the oxygen flux. In addition, both abiotic factors sea-ice concentration and water depth correlate with the macrofauna biomass. However, at water depths > 1500m the influence of the surface sea-ice cover is minimal with water depth becoming more dominant. Benthic remineralization across the Fram Strait on average is similar to 1 mmol C m(-2)d(-1). Our data indicate that the portion of newly produced carbon that is remineralized by the benthos is 5 % in the seasonally low seaice-covered eastern part of Fram Strait but can be 14 % in the permanently high sea-ice-covered western part of Fram Strait. Here, by comparing a permanently sea-ice-covered area with a seasonally sea-ice-covered area, we discuss a potential scenario for the deep-sea benthic ecosystem in the future Arctic Ocean, in which an ... |
format |
Article in Journal/Newspaper |
author |
Hoffmann, Ralf Braeckman, Ulrike Hasemann, Christiane Wenzhöfer, Frank |
author_facet |
Hoffmann, Ralf Braeckman, Ulrike Hasemann, Christiane Wenzhöfer, Frank |
author_sort |
Hoffmann, Ralf |
title |
Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
title_short |
Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
title_full |
Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
title_fullStr |
Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
title_full_unstemmed |
Deep-sea benthic communities and oxygen fluxes in the Arctic Fram Strait controlled by sea-ice cover and water depth |
title_sort |
deep-sea benthic communities and oxygen fluxes in the arctic fram strait controlled by sea-ice cover and water depth |
publishDate |
2018 |
url |
https://biblio.ugent.be/publication/8606825 http://hdl.handle.net/1854/LU-8606825 https://doi.org/10.5194/bg-15-4849-2018 https://biblio.ugent.be/publication/8606825/file/8606826 |
geographic |
Arctic Arctic Ocean |
geographic_facet |
Arctic Arctic Ocean |
genre |
Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice |
genre_facet |
Arctic Arctic Ocean Climate change Fram Strait Phytoplankton Sea ice |
op_source |
BIOGEOSCIENCES ISSN: 1726-4170 ISSN: 1726-4189 |
op_relation |
https://biblio.ugent.be/publication/8606825 http://hdl.handle.net/1854/LU-8606825 http://dx.doi.org/10.5194/bg-15-4849-2018 https://biblio.ugent.be/publication/8606825/file/8606826 |
op_rights |
Creative Commons Attribution 4.0 International Public License (CC-BY 4.0) info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.5194/bg-15-4849-2018 |
container_title |
Biogeosciences |
container_volume |
15 |
container_issue |
16 |
container_start_page |
4849 |
op_container_end_page |
4869 |
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1768382880909623296 |