Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size
It has been suggested that giant Antarctic marine invertebrates will be particularly vulnerable to declining O(2) levels as our ocean warms in line with current climate change predictions. Our study provides some support for this oxygen limitation hypothesis, with larger body sizes being generally m...
Published in: | Philosophical Transactions of the Royal Society B: Biological Sciences |
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ftpubmed:oai:pubmedcentral.nih.gov:6606459 2023-05-15T13:58:40+02:00 Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size Spicer, John I. Morley, Simon A. 2019-08-05 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6606459/ http://www.ncbi.nlm.nih.gov/pubmed/31203754 https://doi.org/10.1098/rstb.2019.0034 en eng The Royal Society http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6606459/ http://www.ncbi.nlm.nih.gov/pubmed/31203754 http://dx.doi.org/10.1098/rstb.2019.0034 © 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. Philos Trans R Soc Lond B Biol Sci Articles Text 2019 ftpubmed https://doi.org/10.1098/rstb.2019.0034 2020-08-09T00:15:10Z It has been suggested that giant Antarctic marine invertebrates will be particularly vulnerable to declining O(2) levels as our ocean warms in line with current climate change predictions. Our study provides some support for this oxygen limitation hypothesis, with larger body sizes being generally more sensitive to O(2) reductions than smaller body sizes. However, it also suggests that the overall picture is a little more complex. We tested predictions from three different, but overlapping, O(2)-related hypotheses accounting for gigantism, using four Antarctic amphipod species encompassing a wide range of body sizes. We found a significant effect of body size, but also of species, in their respiratory responses to acutely declining O(2) tensions. The more active lifestyle of intermediate-sized Prostebbingia brevicornis was supported by a better respiratory performance than predicted by the oxygen limitation hypothesis alone, but consistent with the symmorphosis hypothesis. We suggest that giant polar amphipods are likely to be some of the first to fare badly in an O(2)-poor ocean. However, the products of past evolutionary innovation, such as respiratory pigments that enhance O(2)-transport and novel gas exchange structures, may in some species offset any respiratory disadvantages of either large or small body size. This article is part of the theme issue ‘Physiological diversity, biodiversity patterns and global climate change: testing key hypotheses involving temperature and oxygen’. Text Antarc* Antarctic PubMed Central (PMC) Antarctic Philosophical Transactions of the Royal Society B: Biological Sciences 374 1778 20190034 |
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Articles Spicer, John I. Morley, Simon A. Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
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Articles |
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It has been suggested that giant Antarctic marine invertebrates will be particularly vulnerable to declining O(2) levels as our ocean warms in line with current climate change predictions. Our study provides some support for this oxygen limitation hypothesis, with larger body sizes being generally more sensitive to O(2) reductions than smaller body sizes. However, it also suggests that the overall picture is a little more complex. We tested predictions from three different, but overlapping, O(2)-related hypotheses accounting for gigantism, using four Antarctic amphipod species encompassing a wide range of body sizes. We found a significant effect of body size, but also of species, in their respiratory responses to acutely declining O(2) tensions. The more active lifestyle of intermediate-sized Prostebbingia brevicornis was supported by a better respiratory performance than predicted by the oxygen limitation hypothesis alone, but consistent with the symmorphosis hypothesis. We suggest that giant polar amphipods are likely to be some of the first to fare badly in an O(2)-poor ocean. However, the products of past evolutionary innovation, such as respiratory pigments that enhance O(2)-transport and novel gas exchange structures, may in some species offset any respiratory disadvantages of either large or small body size. This article is part of the theme issue ‘Physiological diversity, biodiversity patterns and global climate change: testing key hypotheses involving temperature and oxygen’. |
format |
Text |
author |
Spicer, John I. Morley, Simon A. |
author_facet |
Spicer, John I. Morley, Simon A. |
author_sort |
Spicer, John I. |
title |
Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
title_short |
Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
title_full |
Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
title_fullStr |
Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
title_full_unstemmed |
Will giant polar amphipods be first to fare badly in an oxygen-poor ocean? Testing hypotheses linking oxygen to body size |
title_sort |
will giant polar amphipods be first to fare badly in an oxygen-poor ocean? testing hypotheses linking oxygen to body size |
publisher |
The Royal Society |
publishDate |
2019 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6606459/ http://www.ncbi.nlm.nih.gov/pubmed/31203754 https://doi.org/10.1098/rstb.2019.0034 |
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Antarctic |
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Antarctic |
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Antarc* Antarctic |
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Antarc* Antarctic |
op_source |
Philos Trans R Soc Lond B Biol Sci |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC6606459/ http://www.ncbi.nlm.nih.gov/pubmed/31203754 http://dx.doi.org/10.1098/rstb.2019.0034 |
op_rights |
© 2019 The Author(s) http://royalsocietypublishing.org/licence Published by the Royal Society. All rights reserved. |
op_doi |
https://doi.org/10.1098/rstb.2019.0034 |
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Philosophical Transactions of the Royal Society B: Biological Sciences |
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374 |
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1778 |
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20190034 |
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