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dc.contributor.authorMcMahon, Kelton W.  Concept link
dc.contributor.authorAmbrose, William G.  Concept link
dc.contributor.authorJohnson, Beverly J.  Concept link
dc.contributor.authorSun, Ming-Yi  Concept link
dc.contributor.authorLopez, Glenn R.  Concept link
dc.contributor.authorClough, Lisa M.  Concept link
dc.contributor.authorCarroll, Michael L.  Concept link
dc.date.accessioned2011-04-22T18:02:08Z
dc.date.available2011-04-22T18:02:08Z
dc.date.issued2006-04-03
dc.identifier.citationMarine Ecology Progress Series 310 (2006): 1-14en_US
dc.identifier.urihttps://hdl.handle.net/1912/4505
dc.descriptionAuthor Posting. © Inter-Research, 2006. This article is posted here by permission of Inter-Research for personal use, not for redistribution. The definitive version was published in Marine Ecology Progress Series 310 (2006): 1-14, doi:10.3354/meps310001.en_US
dc.description.abstractWe assessed the digestibility and utilization of ice algae and phytoplankton by the shallow, subtidal benthos in Ny Ålesund (Kongsfjord) on Svalbard (79°N, 12°E) using chlorophyll a (chl a), essential fatty acids (EFAs) and stable isotopes as tracers of food consumption and assimilation. Intact benthic communities in sediment cores and individuals of dominant benthic taxa were given ice algae, phytoplankton, 13C-enriched ice algae or a no food addition control for 19 to 32 d. Ice algae and phytoplankton had significantly different isotopic signatures and relative concentrations of fatty acids. In the food addition cores, sediment concentrations of chl a and the EFA C20:5(n-3) were elevated by 80 and 93%, respectively, compared to the control after 12 h, but decreased to background levels by 19 d, suggesting that both ice algae and phytoplankton were rapidly consumed. Whole core respiration rates in the ice algae treatments were 1.4 times greater than in the other treatments within 12 h of food addition. In the ice algae treatment, both suspension and deposit feeding taxa from 3 different phyla (Mollusca, Annelida and Sipuncula) exhibited significant enrichment in δ13C values compared to the control. Deposit feeders (15% uptake), however, exhibited significantly greater uptake of the 13C-enriched ice algae tracer than suspension feeders (3% uptake). Our study demonstrates that ice algae are readily consumed and assimilated by the Arctic benthos, and may be preferentially selected by some benthic species (i.e. deposit feeders) due to their elevated EFA content, thus serving as an important component of the Arctic benthic food web.en_US
dc.description.sponsorshipFunding for this study came from the National Science Foundation (Grant numbers OPP- 0514115 to W.G.A.; OPP-0222410 to L.M.C.; OPP-0222408 to M.-Y.S.; OPP0222500 to G.R.L.), the Norwegian Research Council (Grant number 151815-720 to M.L.C.), the Howard Hughes Medical Institute through Bates College and the Maine Marine Research Fund.en_US
dc.format.mimetypeapplication/pdf
dc.language.isoenen_US
dc.publisherInter-Researchen_US
dc.relation.urihttps://doi.org/10.3354/meps310001
dc.subjectIce algaeen_US
dc.subjectPhytoplanktonen_US
dc.subjectFood qualityen_US
dc.subjectArctic benthosen_US
dc.subjectClimate changeen_US
dc.subjectStable isotopesen_US
dc.subjectEssential fatty acidsen_US
dc.subjectSvalbarden_US
dc.titleBenthic community response to ice algae and phytoplankton in Ny Ålesund, Svalbarden_US
dc.typeArticleen_US
dc.identifier.doi10.3354/meps310001


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