Decades of dietary data demonstrate regional food web structures in the Southern Ocean
Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antar...
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ftpubmed:oai:pubmedcentral.nih.gov:7790630 2023-05-15T13:55:29+02:00 Decades of dietary data demonstrate regional food web structures in the Southern Ocean McCormack, Stacey A. Melbourne‐Thomas, Jessica Trebilco, Rowan Blanchard, Julia L. Raymond, Ben Constable, Andrew 2020-12-09 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790630/ http://www.ncbi.nlm.nih.gov/pubmed/33437425 https://doi.org/10.1002/ece3.7017 en eng John Wiley and Sons Inc. http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790630/ http://www.ncbi.nlm.nih.gov/pubmed/33437425 http://dx.doi.org/10.1002/ece3.7017 © 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. CC-BY Ecol Evol Original Research Text 2020 ftpubmed https://doi.org/10.1002/ece3.7017 2021-01-17T01:31:27Z Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antarctic krill, which provide a short, highly efficient food chain, linking primary producers to higher trophic levels. Over the last 15 years, the presence of alternative energy pathways has been identified and hypotheses on their relative importance in different regions raised. Using the largest circumpolar dietary database ever compiled, we tested these hypotheses using an empirical circumpolar comparison of food webs across the four major regions/sectors of the Southern Ocean (defined as south of 40°S) within the austral summer period. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant as the mid‐trophic level for the Atlantic and East Pacific food webs (including the Scotia Arc and Western Antarctic Peninsula), mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions (East Antarctica and the Ross Sea). We also highlight how tracking data and habitat modeling for mobile top predators in the Southern Ocean show that these species integrate food webs over large regional scales. Our study provides a quantitative assessment, based on field observations, of the degree of regional differentiation in Southern Ocean food webs and the relative importance of alternative energy pathways between regions. Text Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica East Antarctica Ross Sea Southern Ocean PubMed Central (PMC) Antarctic Antarctic Peninsula Austral East Antarctica Indian Pacific Ross Sea Southern Ocean Ecology and Evolution 11 1 227 241 |
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English |
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Original Research |
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Original Research McCormack, Stacey A. Melbourne‐Thomas, Jessica Trebilco, Rowan Blanchard, Julia L. Raymond, Ben Constable, Andrew Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
topic_facet |
Original Research |
description |
Understanding regional‐scale food web structure in the Southern Ocean is critical to informing fisheries management and assessments of climate change impacts on Southern Ocean ecosystems and ecosystem services. Historically, a large component of Southern Ocean ecosystem research has focused on Antarctic krill, which provide a short, highly efficient food chain, linking primary producers to higher trophic levels. Over the last 15 years, the presence of alternative energy pathways has been identified and hypotheses on their relative importance in different regions raised. Using the largest circumpolar dietary database ever compiled, we tested these hypotheses using an empirical circumpolar comparison of food webs across the four major regions/sectors of the Southern Ocean (defined as south of 40°S) within the austral summer period. We used network analyses and generalizations of taxonomic food web structure to confirm that while Antarctic krill are dominant as the mid‐trophic level for the Atlantic and East Pacific food webs (including the Scotia Arc and Western Antarctic Peninsula), mesopelagic fish and other krill species are dominant contributors to predator diets in the Indian and West Pacific regions (East Antarctica and the Ross Sea). We also highlight how tracking data and habitat modeling for mobile top predators in the Southern Ocean show that these species integrate food webs over large regional scales. Our study provides a quantitative assessment, based on field observations, of the degree of regional differentiation in Southern Ocean food webs and the relative importance of alternative energy pathways between regions. |
format |
Text |
author |
McCormack, Stacey A. Melbourne‐Thomas, Jessica Trebilco, Rowan Blanchard, Julia L. Raymond, Ben Constable, Andrew |
author_facet |
McCormack, Stacey A. Melbourne‐Thomas, Jessica Trebilco, Rowan Blanchard, Julia L. Raymond, Ben Constable, Andrew |
author_sort |
McCormack, Stacey A. |
title |
Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
title_short |
Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
title_full |
Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
title_fullStr |
Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
title_full_unstemmed |
Decades of dietary data demonstrate regional food web structures in the Southern Ocean |
title_sort |
decades of dietary data demonstrate regional food web structures in the southern ocean |
publisher |
John Wiley and Sons Inc. |
publishDate |
2020 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790630/ http://www.ncbi.nlm.nih.gov/pubmed/33437425 https://doi.org/10.1002/ece3.7017 |
geographic |
Antarctic Antarctic Peninsula Austral East Antarctica Indian Pacific Ross Sea Southern Ocean |
geographic_facet |
Antarctic Antarctic Peninsula Austral East Antarctica Indian Pacific Ross Sea Southern Ocean |
genre |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica East Antarctica Ross Sea Southern Ocean |
genre_facet |
Antarc* Antarctic Antarctic Krill Antarctic Peninsula Antarctica East Antarctica Ross Sea Southern Ocean |
op_source |
Ecol Evol |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC7790630/ http://www.ncbi.nlm.nih.gov/pubmed/33437425 http://dx.doi.org/10.1002/ece3.7017 |
op_rights |
© 2020 The Authors. Ecology and Evolution published by John Wiley & Sons Ltd. This is an open access article under the terms of the http://creativecommons.org/licenses/by/4.0/ License, which permits use, distribution and reproduction in any medium, provided the original work is properly cited. |
op_rightsnorm |
CC-BY |
op_doi |
https://doi.org/10.1002/ece3.7017 |
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Ecology and Evolution |
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11 |
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1 |
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227 |
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241 |
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1766262150822625280 |