Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content
Concerns about increasing atmospheric CO2 concentrations and global warming have initiated studies on the consequences of multiple-stressor interactions on marine organisms and ecosystems. We present a fully-crossed factorial mesocosm study and assess how warming and acidification affect the abundan...
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ftoceanrep:oai:oceanrep.geomar.de:32959 2023-05-15T17:51:44+02:00 Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content Garzke, Jessica Hansen, Thomas Ismar, Stefanie M. H. Sommer, Ulrich 2016-05-25 text https://oceanrep.geomar.de/id/eprint/32959/ https://oceanrep.geomar.de/id/eprint/32959/1/journal.pone.0155952.pdf https://doi.org/10.1371/journal.pone.0155952 en eng Public Library of Science https://oceanrep.geomar.de/id/eprint/32959/1/journal.pone.0155952.pdf Garzke, J., Hansen, T., Ismar, S. M. H. and Sommer, U. (2016) Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content. Open Access PLoS ONE, 11 (5). e0155952. DOI 10.1371/journal.pone.0155952 <https://doi.org/10.1371/journal.pone.0155952>. doi:10.1371/journal.pone.0155952 cc_by_3.0 info:eu-repo/semantics/openAccess Article PeerReviewed 2016 ftoceanrep https://doi.org/10.1371/journal.pone.0155952 2023-04-07T15:25:51Z Concerns about increasing atmospheric CO2 concentrations and global warming have initiated studies on the consequences of multiple-stressor interactions on marine organisms and ecosystems. We present a fully-crossed factorial mesocosm study and assess how warming and acidification affect the abundance, body size, and fatty acid composition of copepods as a measure of nutritional quality. The experimental set-up allowed us to determine whether the effects of warming and acidification act additively, synergistically, or antagonistically on the abundance, body size, and fatty acid content of copepods, a major group of lower level consumers in marine food webs. Copepodite (developmental stages 1–5) and nauplii abundance were antagonistically affected by warming and acidification. Higher temperature decreased copepodite and nauplii abundance, while acidification partially compensated for the temperature effect. The abundance of adult copepods was negatively affected by warming. The prosome length of copepods was significantly reduced by warming, and the interaction of warming and CO2 antagonistically affected prosome length. Fatty acid composition was also significantly affected by warming. The content of saturated fatty acids increased, and the ratios of the polyunsaturated essential fatty acids docosahexaenoic- (DHA) and arachidonic acid (ARA) to total fatty acid content increased with higher temperatures. Additionally, here was a significant additive interaction effect of both parameters on arachidonic acid. Our results indicate that in a future ocean scenario, acidification might partially counteract some observed effects of increased temperature on zooplankton, while adding to others. These may be results of a fertilizing effect on phytoplankton as a copepod food source. In summary, copepod populations will be more strongly affected by warming rather than by acidifying oceans, but ocean acidification effects can modify some temperature impacts Article in Journal/Newspaper Ocean acidification Copepods OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) PLOS ONE 11 5 e0155952 |
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OceanRep (GEOMAR Helmholtz Centre für Ocean Research Kiel) |
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English |
description |
Concerns about increasing atmospheric CO2 concentrations and global warming have initiated studies on the consequences of multiple-stressor interactions on marine organisms and ecosystems. We present a fully-crossed factorial mesocosm study and assess how warming and acidification affect the abundance, body size, and fatty acid composition of copepods as a measure of nutritional quality. The experimental set-up allowed us to determine whether the effects of warming and acidification act additively, synergistically, or antagonistically on the abundance, body size, and fatty acid content of copepods, a major group of lower level consumers in marine food webs. Copepodite (developmental stages 1–5) and nauplii abundance were antagonistically affected by warming and acidification. Higher temperature decreased copepodite and nauplii abundance, while acidification partially compensated for the temperature effect. The abundance of adult copepods was negatively affected by warming. The prosome length of copepods was significantly reduced by warming, and the interaction of warming and CO2 antagonistically affected prosome length. Fatty acid composition was also significantly affected by warming. The content of saturated fatty acids increased, and the ratios of the polyunsaturated essential fatty acids docosahexaenoic- (DHA) and arachidonic acid (ARA) to total fatty acid content increased with higher temperatures. Additionally, here was a significant additive interaction effect of both parameters on arachidonic acid. Our results indicate that in a future ocean scenario, acidification might partially counteract some observed effects of increased temperature on zooplankton, while adding to others. These may be results of a fertilizing effect on phytoplankton as a copepod food source. In summary, copepod populations will be more strongly affected by warming rather than by acidifying oceans, but ocean acidification effects can modify some temperature impacts |
format |
Article in Journal/Newspaper |
author |
Garzke, Jessica Hansen, Thomas Ismar, Stefanie M. H. Sommer, Ulrich |
spellingShingle |
Garzke, Jessica Hansen, Thomas Ismar, Stefanie M. H. Sommer, Ulrich Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
author_facet |
Garzke, Jessica Hansen, Thomas Ismar, Stefanie M. H. Sommer, Ulrich |
author_sort |
Garzke, Jessica |
title |
Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
title_short |
Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
title_full |
Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
title_fullStr |
Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
title_full_unstemmed |
Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content |
title_sort |
combined effects of ocean warming and acidification on copepod abundance, body size and fatty acid content |
publisher |
Public Library of Science |
publishDate |
2016 |
url |
https://oceanrep.geomar.de/id/eprint/32959/ https://oceanrep.geomar.de/id/eprint/32959/1/journal.pone.0155952.pdf https://doi.org/10.1371/journal.pone.0155952 |
genre |
Ocean acidification Copepods |
genre_facet |
Ocean acidification Copepods |
op_relation |
https://oceanrep.geomar.de/id/eprint/32959/1/journal.pone.0155952.pdf Garzke, J., Hansen, T., Ismar, S. M. H. and Sommer, U. (2016) Combined Effects of Ocean Warming and Acidification on Copepod Abundance, Body Size and Fatty Acid Content. Open Access PLoS ONE, 11 (5). e0155952. DOI 10.1371/journal.pone.0155952 <https://doi.org/10.1371/journal.pone.0155952>. doi:10.1371/journal.pone.0155952 |
op_rights |
cc_by_3.0 info:eu-repo/semantics/openAccess |
op_doi |
https://doi.org/10.1371/journal.pone.0155952 |
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PLOS ONE |
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11 |
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5 |
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e0155952 |
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