Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau
Abstract Pteropods are a group of small marine gastropods that are highly sensitive to multiple stressors associated with climate change. Their trophic ecology is not well studied, with most research having focused primarily on the effects of ocean acidification on their fragile, aragonite shells. S...
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crwiley:10.1002/ece3.5380 2024-06-02T07:56:51+00:00 Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau Weldrick, Christine K. Trebilco, Rowan Davies, Diana M. Swadling, Kerrie M. Holsworth Wildlife Research Endowment Australian Nuclear Science and Technology Organisation Australian Antarctic Division 2019 http://dx.doi.org/10.1002/ece3.5380 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.5380 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5380 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.5380 en eng Wiley http://creativecommons.org/licenses/by/4.0/ Ecology and Evolution volume 9, issue 14, page 8119-8132 ISSN 2045-7758 2045-7758 journal-article 2019 crwiley https://doi.org/10.1002/ece3.5380 2024-05-03T11:35:32Z Abstract Pteropods are a group of small marine gastropods that are highly sensitive to multiple stressors associated with climate change. Their trophic ecology is not well studied, with most research having focused primarily on the effects of ocean acidification on their fragile, aragonite shells. Stable isotopes analysis coupled with isotope‐based Bayesian niche metrics is useful for characterizing the trophic structure of biological assemblages. These approaches have not been implemented for pteropod assemblages. We used isotope‐based Bayesian niche metrics to investigate the trophic relationships of three co‐occurring pteropod species, with distinct feeding behaviors, sampled from the Southern Kerguelen Plateau area in the Indian Sector of the Southern Ocean—a biologically and economically important but poorly studied region. Two of these species were gymnosomes (shell‐less pteropods), which are traditionally regarded as specialist predators on other pteropods, and the third species was a thecosome (shelled pteropod), which are typically generalist omnivores. For each species, we aimed to understand (a) variability and overlap among isotopic niches; and (b) whether there was a relationship between body size and trophic position. Observed isotopic niche areas were broadest for gymnosomes, especially Clione limacina antarctica , whose observed isotopic niche area was wider than expected on both δ 13 C and δ 15 N value axes. We also found that trophic position significantly increased with increasing body length for Spongiobranchaea australis . We found no indication of a dietary shift toward increased trophic position with increasing body size for Clio pyramidata f. sulcata . Trophic positions ranged from 2.8 to 3.5, revealing an assemblage composed of both primary and secondary consumer behaviors. This study provides a comprehensive comparative analysis on trophodynamics in Southern Ocean pteropod species, and supports previous studies using gut content, fatty acid and stable isotope analyses. Combined, our ... Article in Journal/Newspaper Antarc* Antarctica Clione limacina Limacina antarctica Ocean acidification Southern Ocean Wiley Online Library Indian Kerguelen Southern Ocean Ecology and Evolution 9 14 8119 8132 |
institution |
Open Polar |
collection |
Wiley Online Library |
op_collection_id |
crwiley |
language |
English |
description |
Abstract Pteropods are a group of small marine gastropods that are highly sensitive to multiple stressors associated with climate change. Their trophic ecology is not well studied, with most research having focused primarily on the effects of ocean acidification on their fragile, aragonite shells. Stable isotopes analysis coupled with isotope‐based Bayesian niche metrics is useful for characterizing the trophic structure of biological assemblages. These approaches have not been implemented for pteropod assemblages. We used isotope‐based Bayesian niche metrics to investigate the trophic relationships of three co‐occurring pteropod species, with distinct feeding behaviors, sampled from the Southern Kerguelen Plateau area in the Indian Sector of the Southern Ocean—a biologically and economically important but poorly studied region. Two of these species were gymnosomes (shell‐less pteropods), which are traditionally regarded as specialist predators on other pteropods, and the third species was a thecosome (shelled pteropod), which are typically generalist omnivores. For each species, we aimed to understand (a) variability and overlap among isotopic niches; and (b) whether there was a relationship between body size and trophic position. Observed isotopic niche areas were broadest for gymnosomes, especially Clione limacina antarctica , whose observed isotopic niche area was wider than expected on both δ 13 C and δ 15 N value axes. We also found that trophic position significantly increased with increasing body length for Spongiobranchaea australis . We found no indication of a dietary shift toward increased trophic position with increasing body size for Clio pyramidata f. sulcata . Trophic positions ranged from 2.8 to 3.5, revealing an assemblage composed of both primary and secondary consumer behaviors. This study provides a comprehensive comparative analysis on trophodynamics in Southern Ocean pteropod species, and supports previous studies using gut content, fatty acid and stable isotope analyses. Combined, our ... |
author2 |
Holsworth Wildlife Research Endowment Australian Nuclear Science and Technology Organisation Australian Antarctic Division |
format |
Article in Journal/Newspaper |
author |
Weldrick, Christine K. Trebilco, Rowan Davies, Diana M. Swadling, Kerrie M. |
spellingShingle |
Weldrick, Christine K. Trebilco, Rowan Davies, Diana M. Swadling, Kerrie M. Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
author_facet |
Weldrick, Christine K. Trebilco, Rowan Davies, Diana M. Swadling, Kerrie M. |
author_sort |
Weldrick, Christine K. |
title |
Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
title_short |
Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
title_full |
Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
title_fullStr |
Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
title_full_unstemmed |
Trophodynamics of Southern Ocean pteropods on the southern Kerguelen Plateau |
title_sort |
trophodynamics of southern ocean pteropods on the southern kerguelen plateau |
publisher |
Wiley |
publishDate |
2019 |
url |
http://dx.doi.org/10.1002/ece3.5380 https://api.wiley.com/onlinelibrary/tdm/v1/articles/10.1002%2Fece3.5380 https://onlinelibrary.wiley.com/doi/pdf/10.1002/ece3.5380 https://onlinelibrary.wiley.com/doi/full-xml/10.1002/ece3.5380 |
geographic |
Indian Kerguelen Southern Ocean |
geographic_facet |
Indian Kerguelen Southern Ocean |
genre |
Antarc* Antarctica Clione limacina Limacina antarctica Ocean acidification Southern Ocean |
genre_facet |
Antarc* Antarctica Clione limacina Limacina antarctica Ocean acidification Southern Ocean |
op_source |
Ecology and Evolution volume 9, issue 14, page 8119-8132 ISSN 2045-7758 2045-7758 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ |
op_doi |
https://doi.org/10.1002/ece3.5380 |
container_title |
Ecology and Evolution |
container_volume |
9 |
container_issue |
14 |
container_start_page |
8119 |
op_container_end_page |
8132 |
_version_ |
1800759541894217728 |