Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics
The hydrothermal vents on the East Scotia Ridge are the first to be explored in the Antarctic and are dominated by large peltospiroid gastropods, stalked barnacles (Vulcanolepas sp.) and anomuran crabs (Kiwa sp.) but their food webs are unknown. Vent fluid and macroconsumer samples were collected at...
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ftpubmed:oai:pubmedcentral.nih.gov:3676328 2023-05-15T13:56:13+02:00 Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics Reid, William D. K. Sweeting, Christopher J. Wigham, Ben D. Zwirglmaier, Katrin Hawkes, Jeffrey A. McGill, Rona A. R. Linse, Katrin Polunin, Nicholas V. C. 2013-06-07 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3676328 http://www.ncbi.nlm.nih.gov/pubmed/23762393 https://doi.org/10.1371/journal.pone.0065553 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3676328 http://www.ncbi.nlm.nih.gov/pubmed/23762393 http://dx.doi.org/10.1371/journal.pone.0065553 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Research Article Text 2013 ftpubmed https://doi.org/10.1371/journal.pone.0065553 2013-09-05T00:48:14Z The hydrothermal vents on the East Scotia Ridge are the first to be explored in the Antarctic and are dominated by large peltospiroid gastropods, stalked barnacles (Vulcanolepas sp.) and anomuran crabs (Kiwa sp.) but their food webs are unknown. Vent fluid and macroconsumer samples were collected at three vent sites (E2, E9N and E9S) at distances of tens of metres to hundreds of kilometres apart with contrasting vent fluid chemistries to describe trophic interactions and identify potential carbon fixation pathways using stable isotopes. δ13C of dissolved inorganic carbon from vent fluids ranged from −4.6‰ to 0.8‰ at E2 and from −4.4‰ to 1.5‰ at E9. The lowest macroconsumer δ13C was observed in peltospiroid gastropods (−30.0‰ to −31.1‰) and indicated carbon fixation via the Calvin-Benson-Bassham (CBB) cycle by endosymbiotic gamma-Proteobacteria. Highest δ13C occurred in Kiwa sp. (−19.0‰ to −10.5‰), similar to that of the epibionts sampled from their ventral setae. Kiwa sp. δ13C differed among sites, which were attributed to spatial differences in the epibiont community and the relative contribution of carbon fixed via the reductive tricarboxylic acid (rTCA) and CBB cycles assimilated by Kiwa sp. Site differences in carbon fixation pathways were traced into higher trophic levels e.g. a stichasterid asteroid that predates on Kiwa sp. Sponges and anemones at the periphery of E2 assimilated a proportion of epipelagic photosynthetic primary production but this was not observed at E9N. Differences in the δ13C and δ34S values of vent macroconsumers between E2 and E9 sites suggest the relative contributions of photosynthetic and chemoautotrophic carbon fixation (rTCA v CBB) entering the hydrothermal vent food webs vary between the sites. Text Antarc* Antarctic PubMed Central (PMC) Antarctic Calvin ENVELOPE(165.100,165.100,-71.283,-71.283) East Scotia Ridge ENVELOPE(-29.250,-29.250,-57.917,-57.917) The Antarctic PLoS ONE 8 6 e65553 |
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Open Polar |
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PubMed Central (PMC) |
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English |
topic |
Research Article |
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Research Article Reid, William D. K. Sweeting, Christopher J. Wigham, Ben D. Zwirglmaier, Katrin Hawkes, Jeffrey A. McGill, Rona A. R. Linse, Katrin Polunin, Nicholas V. C. Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
topic_facet |
Research Article |
description |
The hydrothermal vents on the East Scotia Ridge are the first to be explored in the Antarctic and are dominated by large peltospiroid gastropods, stalked barnacles (Vulcanolepas sp.) and anomuran crabs (Kiwa sp.) but their food webs are unknown. Vent fluid and macroconsumer samples were collected at three vent sites (E2, E9N and E9S) at distances of tens of metres to hundreds of kilometres apart with contrasting vent fluid chemistries to describe trophic interactions and identify potential carbon fixation pathways using stable isotopes. δ13C of dissolved inorganic carbon from vent fluids ranged from −4.6‰ to 0.8‰ at E2 and from −4.4‰ to 1.5‰ at E9. The lowest macroconsumer δ13C was observed in peltospiroid gastropods (−30.0‰ to −31.1‰) and indicated carbon fixation via the Calvin-Benson-Bassham (CBB) cycle by endosymbiotic gamma-Proteobacteria. Highest δ13C occurred in Kiwa sp. (−19.0‰ to −10.5‰), similar to that of the epibionts sampled from their ventral setae. Kiwa sp. δ13C differed among sites, which were attributed to spatial differences in the epibiont community and the relative contribution of carbon fixed via the reductive tricarboxylic acid (rTCA) and CBB cycles assimilated by Kiwa sp. Site differences in carbon fixation pathways were traced into higher trophic levels e.g. a stichasterid asteroid that predates on Kiwa sp. Sponges and anemones at the periphery of E2 assimilated a proportion of epipelagic photosynthetic primary production but this was not observed at E9N. Differences in the δ13C and δ34S values of vent macroconsumers between E2 and E9 sites suggest the relative contributions of photosynthetic and chemoautotrophic carbon fixation (rTCA v CBB) entering the hydrothermal vent food webs vary between the sites. |
format |
Text |
author |
Reid, William D. K. Sweeting, Christopher J. Wigham, Ben D. Zwirglmaier, Katrin Hawkes, Jeffrey A. McGill, Rona A. R. Linse, Katrin Polunin, Nicholas V. C. |
author_facet |
Reid, William D. K. Sweeting, Christopher J. Wigham, Ben D. Zwirglmaier, Katrin Hawkes, Jeffrey A. McGill, Rona A. R. Linse, Katrin Polunin, Nicholas V. C. |
author_sort |
Reid, William D. K. |
title |
Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
title_short |
Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
title_full |
Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
title_fullStr |
Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
title_full_unstemmed |
Spatial Differences in East Scotia Ridge Hydrothermal Vent Food Webs: Influences of Chemistry, Microbiology and Predation on Trophodynamics |
title_sort |
spatial differences in east scotia ridge hydrothermal vent food webs: influences of chemistry, microbiology and predation on trophodynamics |
publisher |
Public Library of Science |
publishDate |
2013 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3676328 http://www.ncbi.nlm.nih.gov/pubmed/23762393 https://doi.org/10.1371/journal.pone.0065553 |
long_lat |
ENVELOPE(165.100,165.100,-71.283,-71.283) ENVELOPE(-29.250,-29.250,-57.917,-57.917) |
geographic |
Antarctic Calvin East Scotia Ridge The Antarctic |
geographic_facet |
Antarctic Calvin East Scotia Ridge The Antarctic |
genre |
Antarc* Antarctic |
genre_facet |
Antarc* Antarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC3676328 http://www.ncbi.nlm.nih.gov/pubmed/23762393 http://dx.doi.org/10.1371/journal.pone.0065553 |
op_rights |
This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1371/journal.pone.0065553 |
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PLoS ONE |
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8 |
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6 |
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e65553 |
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1766263584321437696 |