Chemosynthesis influences food web and community structure in high-Arctic benthos
Cold 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 se...
Published in: | Marine Ecology Progress Series |
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Language: | English |
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ftnioz:oai:imis.nioz.nl:323651 2023-05-15T14:58:37+02:00 Chemosynthesis influences food web and community structure in high-Arctic benthos Åström, E.K.L. Carroll, M. Sen, A. Niemann, H. Ambrose, W.G. Lehmann, M.F. Carroll, J. 2019 application/pdf https://www.vliz.be/imisdocs/publications/99/344399.pdf en eng info:eu-repo/semantics/altIdentifier/wos/000521168400002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/meps13101 https://www.vliz.be/imisdocs/publications/99/344399.pdf info:eu-repo/semantics/openAccess %3Ci%3EMar.+Ecol.+Prog.+Ser.+629%3C%2Fi%3E%3A+19-42.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps13101%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps13101%3C%2Fa%3E info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion 2019 ftnioz https://doi.org/10.3354/meps13101 2022-05-01T14:11:41Z Cold 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 -2 ), and thyasirid bivalves, cf. pygmaea (up to 4770 ind. m -2 ). We detected low δ 13 C signatures in chemosymbiotic polychaetes and in 3 species of omnivorous/predatory polychaetes. These δ 13 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 ecosystem. Article in Journal/Newspaper Arctic Barents Sea NIOZ Repository (Royal Netherlands Institute for Sea Research) Arctic Barents Sea Marine Ecology Progress Series 629 19 42 |
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Open Polar |
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NIOZ Repository (Royal Netherlands Institute for Sea Research) |
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ftnioz |
language |
English |
description |
Cold 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 -2 ), and thyasirid bivalves, cf. pygmaea (up to 4770 ind. m -2 ). We detected low δ 13 C signatures in chemosymbiotic polychaetes and in 3 species of omnivorous/predatory polychaetes. These δ 13 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 ecosystem. |
format |
Article in Journal/Newspaper |
author |
Åström, E.K.L. Carroll, M. Sen, A. Niemann, H. Ambrose, W.G. Lehmann, M.F. Carroll, J. |
spellingShingle |
Åström, E.K.L. Carroll, M. Sen, A. Niemann, H. Ambrose, W.G. Lehmann, M.F. Carroll, J. Chemosynthesis influences food web and community structure in high-Arctic benthos |
author_facet |
Åström, E.K.L. Carroll, M. Sen, A. Niemann, H. Ambrose, W.G. Lehmann, M.F. Carroll, J. |
author_sort |
Åström, E.K.L. |
title |
Chemosynthesis influences food web and community structure in high-Arctic benthos |
title_short |
Chemosynthesis influences food web and community structure in high-Arctic benthos |
title_full |
Chemosynthesis influences food web and community structure in high-Arctic benthos |
title_fullStr |
Chemosynthesis influences food web and community structure in high-Arctic benthos |
title_full_unstemmed |
Chemosynthesis influences food web and community structure in high-Arctic benthos |
title_sort |
chemosynthesis influences food web and community structure in high-arctic benthos |
publishDate |
2019 |
url |
https://www.vliz.be/imisdocs/publications/99/344399.pdf |
geographic |
Arctic Barents Sea |
geographic_facet |
Arctic Barents Sea |
genre |
Arctic Barents Sea |
genre_facet |
Arctic Barents Sea |
op_source |
%3Ci%3EMar.+Ecol.+Prog.+Ser.+629%3C%2Fi%3E%3A+19-42.+%3Ca+href%3D%22https%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps13101%22+target%3D%22_blank%22%3Ehttps%3A%2F%2Fdx.doi.org%2F10.3354%2Fmeps13101%3C%2Fa%3E |
op_relation |
info:eu-repo/semantics/altIdentifier/wos/000521168400002 info:eu-repo/semantics/altIdentifier/doi/doi.org/10.3354/meps13101 https://www.vliz.be/imisdocs/publications/99/344399.pdf |
op_rights |
info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.3354/meps13101 |
container_title |
Marine Ecology Progress Series |
container_volume |
629 |
container_start_page |
19 |
op_container_end_page |
42 |
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1766330754232483840 |