Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents
Sedimented hydrothermal vents are those in which hydrothermal fluid vents through sediment and are among the least studied deep-sea ecosystems. We present a combination of microbial and biochemical data to assess trophodynamics between and within hydrothermally active and off-vent areas of the Brans...
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ftcopernicus:oai:publications.copernicus.org:bgd53987 2023-05-15T13:43:09+02:00 Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents Bell, James B. Reid, William D. K. Pearce, David A. Glover, Adrian G. Sweeting, Christopher J. Newton, Jason Woulds, Clare 2018-09-26 application/pdf https://doi.org/10.5194/bg-2016-318 https://www.biogeosciences-discuss.net/bg-2016-318/ eng eng doi:10.5194/bg-2016-318 https://www.biogeosciences-discuss.net/bg-2016-318/ eISSN: 1726-4189 Text 2018 ftcopernicus https://doi.org/10.5194/bg-2016-318 2019-12-24T09:52:02Z Sedimented hydrothermal vents are those in which hydrothermal fluid vents through sediment and are among the least studied deep-sea ecosystems. We present a combination of microbial and biochemical data to assess trophodynamics between and within hydrothermally active and off-vent areas of the Bransfield Strait (1050–1647 m depth). Microbial composition, biomass and fatty acid signatures varied widely between and within vent and non-vent sites and provided evidence of diverse metabolic activity. Several species showed diverse feeding strategies and occupied different trophic positions in vent and non-vent areas and stable isotope values of consumers were generally not consistent with feeding structure morphology. Niche area and the diversity of microbial fatty acids reflected trends in species diversity and was lowest at the most hydrothermally active site. Faunal utilisation of chemosynthetic activity was relatively limited but was detected at both vent and non-vent sites as evidenced by carbon and sulphur isotopic signatures, suggesting that the hydrothermal activity can affect trophodynamics over a much wider area than previously thought. Text Antarc* Antarctic Bransfield Strait Copernicus Publications: E-Journals Antarctic Bransfield Strait |
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Copernicus Publications: E-Journals |
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ftcopernicus |
language |
English |
description |
Sedimented hydrothermal vents are those in which hydrothermal fluid vents through sediment and are among the least studied deep-sea ecosystems. We present a combination of microbial and biochemical data to assess trophodynamics between and within hydrothermally active and off-vent areas of the Bransfield Strait (1050–1647 m depth). Microbial composition, biomass and fatty acid signatures varied widely between and within vent and non-vent sites and provided evidence of diverse metabolic activity. Several species showed diverse feeding strategies and occupied different trophic positions in vent and non-vent areas and stable isotope values of consumers were generally not consistent with feeding structure morphology. Niche area and the diversity of microbial fatty acids reflected trends in species diversity and was lowest at the most hydrothermally active site. Faunal utilisation of chemosynthetic activity was relatively limited but was detected at both vent and non-vent sites as evidenced by carbon and sulphur isotopic signatures, suggesting that the hydrothermal activity can affect trophodynamics over a much wider area than previously thought. |
format |
Text |
author |
Bell, James B. Reid, William D. K. Pearce, David A. Glover, Adrian G. Sweeting, Christopher J. Newton, Jason Woulds, Clare |
spellingShingle |
Bell, James B. Reid, William D. K. Pearce, David A. Glover, Adrian G. Sweeting, Christopher J. Newton, Jason Woulds, Clare Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
author_facet |
Bell, James B. Reid, William D. K. Pearce, David A. Glover, Adrian G. Sweeting, Christopher J. Newton, Jason Woulds, Clare |
author_sort |
Bell, James B. |
title |
Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
title_short |
Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
title_full |
Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
title_fullStr |
Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
title_full_unstemmed |
Hydrothermal activity lowers trophic diversity in Antarctic sedimented hydrothermal vents |
title_sort |
hydrothermal activity lowers trophic diversity in antarctic sedimented hydrothermal vents |
publishDate |
2018 |
url |
https://doi.org/10.5194/bg-2016-318 https://www.biogeosciences-discuss.net/bg-2016-318/ |
geographic |
Antarctic Bransfield Strait |
geographic_facet |
Antarctic Bransfield Strait |
genre |
Antarc* Antarctic Bransfield Strait |
genre_facet |
Antarc* Antarctic Bransfield Strait |
op_source |
eISSN: 1726-4189 |
op_relation |
doi:10.5194/bg-2016-318 https://www.biogeosciences-discuss.net/bg-2016-318/ |
op_doi |
https://doi.org/10.5194/bg-2016-318 |
_version_ |
1766185189770264576 |