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dc.contributor.authorStasko, Ashley D
dc.contributor.authorBluhm, Bodil
dc.contributor.authorMichel, Christine
dc.contributor.authorArchambault, Philippe
dc.contributor.authorMajewski, Andrew
dc.contributor.authorReist, James D
dc.contributor.authorSwanson, Heidi
dc.contributor.authorPower, Michael
dc.date.accessioned2019-02-22T13:40:45Z
dc.date.available2019-02-22T13:40:45Z
dc.date.issued2018-04-26
dc.description.abstractUnderstanding 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.en_US
dc.description.sponsorshipThe Fisheries Joint Management Committee; ? Aboriginal Affairs and Northern Development Canada (BREA); ? Natural Resources Canada (Environmental Research Fund, Program of Energy Research and Development); ? Internal Fisheries and Oceans Canada; ? NSERC Canada Graduate Scholarship; ? Michael Smith Foreign Study Supplement; ? NSERC Discovery grants; ?en_US
dc.descriptionSource at: <a href=http://doi.org/10.3354/meps12582> http://doi.org/10.3354/meps12582</a>en_US
dc.identifier.citationStasko, 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. <i>Marine Ecology Progress Series, 594</i>(1), 1-19. http://doi.org/10.3354/meps12582en_US
dc.identifier.cristinIDFRIDAID 1623505
dc.identifier.doi10.3354/meps12582
dc.identifier.issn0171-8630
dc.identifier.issn1616-1599
dc.identifier.urihttps://hdl.handle.net/10037/14750
dc.language.isoengen_US
dc.publisherInter-Researchen_US
dc.relation.journalMarine Ecology Progress Series
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480::Marine biology: 497en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480::Marinbiologi: 497en_US
dc.titleBenthic-pelagic trophic coupling in an Arctic marine food web along vertical water mass and organic matter gradientsen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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