Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients
Source at: http://doi.org/10.3354/meps12582 Understanding drivers of benthic-pelagic coupling in Arctic marine ecosystems is key to identifying benthic areas that may be sensitive to climate-driven changes in hydrography and surface production. We coupled algal biomass and sedimentary characteristic...
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Online Access: | https://hdl.handle.net/10037/14750 https://doi.org/10.3354/meps12582 |
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ftunivtroemsoe:oai:munin.uit.no:10037/14750 2023-05-15T13:22:57+02:00 Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients Stasko, Ashley D Bluhm, Bodil Michel, Christine Archambault, Philippe Majewski, Andrew Reist, James D Swanson, Heidi Power, Michael 2018-04-26 https://hdl.handle.net/10037/14750 https://doi.org/10.3354/meps12582 eng eng Inter-Research Marine Ecology Progress Series Stasko, A. D., Bluhm, B., Michel, C., Archambault, P., Majewski, A., Reist, J. D., Swanson, H. & Power, M. (2018). Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients. Marine Ecology Progress Series, 594 (1), 1-19. http://doi.org/10.3354/meps12582 FRIDAID 1623505 doi:10.3354/meps12582 0171-8630 1616-1599 https://hdl.handle.net/10037/14750 openAccess VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Journal article Tidsskriftartikkel Peer reviewed 2018 ftunivtroemsoe https://doi.org/10.3354/meps12582 2021-06-25T17:56:21Z Source at: http://doi.org/10.3354/meps12582 Understanding drivers of benthic-pelagic coupling in Arctic marine ecosystems is key to identifying benthic areas that may be sensitive to climate-driven changes in hydrography and surface production. We coupled algal biomass and sedimentary characteristics with stable isotope data for 113 fishes and invertebrates in the Canadian Beaufort Sea and Amundsen Gulf to examine how trophic structure was influenced by the vertical water mass structure and organic matter input regimes, from 20 to 1000 m depths. Indices of community-level trophic diversity (isotopic niche size, 13C enrichment relative to a pelagic baseline, and δ13C isotopic range) increased from west to east, coincident with the use of more diverse dietary carbon sources among benthic functional groups. Data suggested benthic-pelagic trophic coupling was strongest in the western study region where pelagic sinking flux is relatively high, intermediate in the central region dominated by riverine inputs of terrestrial organic matter, and weakest in the east where strong pelagic grazing is known to limit sinking flux. Differences in δ13C between pelagic and benthic functional groups (up to 5.7 ‰) increased from west to east, and from the nearshore shelf to the upper slope. On the upper slope, much of the sinking organic matter may be intercepted in the water column, and dynamic hydrography likely diversifies available food sources. In waters > 750 m, there were no clear trends in benthic-pelagic coupling or community-level trophic diversity. This study represents the first description of fish and invertebrate food web structure > 200 m in the Canadian Beaufort Sea. Article in Journal/Newspaper Amundsen Gulf Arctic Arctic Beaufort Sea University of Tromsø: Munin Open Research Archive Arctic Marine Ecology Progress Series 594 1 19 |
institution |
Open Polar |
collection |
University of Tromsø: Munin Open Research Archive |
op_collection_id |
ftunivtroemsoe |
language |
English |
topic |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
spellingShingle |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 Stasko, Ashley D Bluhm, Bodil Michel, Christine Archambault, Philippe Majewski, Andrew Reist, James D Swanson, Heidi Power, Michael Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
topic_facet |
VDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497 VDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497 |
description |
Source at: http://doi.org/10.3354/meps12582 Understanding drivers of benthic-pelagic coupling in Arctic marine ecosystems is key to identifying benthic areas that may be sensitive to climate-driven changes in hydrography and surface production. We coupled algal biomass and sedimentary characteristics with stable isotope data for 113 fishes and invertebrates in the Canadian Beaufort Sea and Amundsen Gulf to examine how trophic structure was influenced by the vertical water mass structure and organic matter input regimes, from 20 to 1000 m depths. Indices of community-level trophic diversity (isotopic niche size, 13C enrichment relative to a pelagic baseline, and δ13C isotopic range) increased from west to east, coincident with the use of more diverse dietary carbon sources among benthic functional groups. Data suggested benthic-pelagic trophic coupling was strongest in the western study region where pelagic sinking flux is relatively high, intermediate in the central region dominated by riverine inputs of terrestrial organic matter, and weakest in the east where strong pelagic grazing is known to limit sinking flux. Differences in δ13C between pelagic and benthic functional groups (up to 5.7 ‰) increased from west to east, and from the nearshore shelf to the upper slope. On the upper slope, much of the sinking organic matter may be intercepted in the water column, and dynamic hydrography likely diversifies available food sources. In waters > 750 m, there were no clear trends in benthic-pelagic coupling or community-level trophic diversity. This study represents the first description of fish and invertebrate food web structure > 200 m in the Canadian Beaufort Sea. |
format |
Article in Journal/Newspaper |
author |
Stasko, Ashley D Bluhm, Bodil Michel, Christine Archambault, Philippe Majewski, Andrew Reist, James D Swanson, Heidi Power, Michael |
author_facet |
Stasko, Ashley D Bluhm, Bodil Michel, Christine Archambault, Philippe Majewski, Andrew Reist, James D Swanson, Heidi Power, Michael |
author_sort |
Stasko, Ashley D |
title |
Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
title_short |
Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
title_full |
Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
title_fullStr |
Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
title_full_unstemmed |
Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients |
title_sort |
benthic-pelagic trophic coupling in an arctic marine food web along vertical water mass and organic matter gradients |
publisher |
Inter-Research |
publishDate |
2018 |
url |
https://hdl.handle.net/10037/14750 https://doi.org/10.3354/meps12582 |
geographic |
Arctic |
geographic_facet |
Arctic |
genre |
Amundsen Gulf Arctic Arctic Beaufort Sea |
genre_facet |
Amundsen Gulf Arctic Arctic Beaufort Sea |
op_relation |
Marine Ecology Progress Series Stasko, A. D., Bluhm, B., Michel, C., Archambault, P., Majewski, A., Reist, J. D., Swanson, H. & Power, M. (2018). Benthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradients. Marine Ecology Progress Series, 594 (1), 1-19. http://doi.org/10.3354/meps12582 FRIDAID 1623505 doi:10.3354/meps12582 0171-8630 1616-1599 https://hdl.handle.net/10037/14750 |
op_rights |
openAccess |
op_doi |
https://doi.org/10.3354/meps12582 |
container_title |
Marine Ecology Progress Series |
container_volume |
594 |
container_start_page |
1 |
op_container_end_page |
19 |
_version_ |
1766368049586241536 |