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dc.contributor.authorÅström, Emmelie
dc.contributor.authorCarroll, Michael
dc.contributor.authorSen, Arunima
dc.contributor.authorNiemann, Helge
dc.contributor.authorAmbrose Jr., William G.
dc.contributor.authorLehmann, Moritz F
dc.contributor.authorCarroll, JoLynn
dc.date.accessioned2019-10-30T10:25:28Z
dc.date.available2019-10-30T10:25:28Z
dc.date.issued2019-10-25
dc.description.abstractCold seeps are locations where seafloor communities are influenced by the seepage of methane and other reduced compounds from the seabed. We examined macro-infaunal benthos through community analysis and trophic structure using stable isotope analysis at 3 seep locations in the Barents Sea. These seeps were characterized by high densities of the chemosymbiotic polychaetes Siboglinidae, clade Frenulata (up to 32120 ind. m<sup>-2</sup>), and thyasirid bivalves, <i>Mendicula</i> cf. <i>pygmaea</i> (up to 4770 ind. m<sup>-2</sup>). We detected low δ<sup>13</sup>C signatures in chemosymbiotic polychaetes and in 3 species of omnivorous/predatory polychaetes. These δ<sup>13</sup>C signatures indicate the input of chemosynthesis-based carbon (CBC) into the food web. Applying a 2-source mixing model, we demonstrated that 28-41% of the nutrition of non-chemosymbiotic polychaetes originates from CBC. We also documented large community variations and small-scale variability within and among the investigated seeps, showing that the impact of seepage on faunal community structure transcends geographic boundaries within the Barents Sea. Moreover, aggregations of heterotrophic macro- and megafauna associated with characteristic seep features (microbial mats, carbonate outcrops, and chemosymbiotic worm-tufts) add 3-dimensional structure and habitat complexity to the seafloor. Cold seeps contribute to the hydrocarbon-derived chemoautotrophy component of these ecosystems and to habitat complexity. These characteristics make the cold seeps of potential high ecological relevance in the functioning of the larger Arctic-Barents Sea ecosystemen_US
dc.descriptionSource at <a href=https://doi.org/10.3354/meps13101>https://doi.org/10.3354/meps13101. </a>en_US
dc.identifier.citationÅström, E.K.L., Carroll, M.L., Sen, A., Niemann, H., Ambrose Jr., W.G., Lehmann, M.F. & Carroll, J. (2019). Chemosynthesis influences food web and community structure in high-Arctic benthos. <i>Marine Ecology Progress Series, 629</i>, 19-42. https://doi.org/10.3354/meps13101en_US
dc.identifier.cristinIDFRIDAID 1741512
dc.identifier.doi10.3354/meps13101
dc.identifier.issn0171-8630
dc.identifier.issn1616-1599
dc.identifier.urihttps://hdl.handle.net/10037/16522
dc.language.isoengen_US
dc.publisherInter Researchen_US
dc.relation.journalMarine Ecology Progress Series
dc.relation.projectIDinfo:eu-repo/grantAgreement/RCN/SFF/223259/Norway/Centre for Arctic Gas Hydrate, Environment and Climate/CAGE/en_US
dc.rights.accessRightsopenAccessen_US
dc.subjectVDP::Mathematics and natural science: 400::Geosciences: 450en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Geofag: 450en_US
dc.subjectVDP::Mathematics and natural science: 400::Zoology and botany: 480en_US
dc.subjectVDP::Matematikk og Naturvitenskap: 400::Zoologiske og botaniske fag: 480en_US
dc.subjectCold seepsen_US
dc.subjectBenthosen_US
dc.subjectMethaneen_US
dc.subjectTrophic structureen_US
dc.subjectStable isotopesen_US
dc.subjectBarents Seaen_US
dc.subjectSvalbarden_US
dc.titleChemosynthesis influences food web and community structure in high-Arctic benthosen_US
dc.typeJournal articleen_US
dc.typeTidsskriftartikkelen_US
dc.typePeer revieweden_US


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