Climate Effects on High Latitude Daphnia via Food Quality and Thresholds
Climate change is proceeding rapidly at high northern latitudes and may have a variety of direct and indirect effects on aquatic food webs. One predicted effect is the potential shift in phytoplankton community structure towards increased cyanobacterial abundance. Given that cyanobacteria are known...
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ftpubmed:oai:pubmedcentral.nih.gov:4430472 2023-05-15T17:58:14+02:00 Climate Effects on High Latitude Daphnia via Food Quality and Thresholds Przytulska, Anna Bartosiewicz, Maciej Rautio, Milla Dufresne, France Vincent, Warwick F. 2015-05-13 http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430472/ http://www.ncbi.nlm.nih.gov/pubmed/25970289 https://doi.org/10.1371/journal.pone.0126231 en eng Public Library of Science http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430472/ http://www.ncbi.nlm.nih.gov/pubmed/25970289 http://dx.doi.org/10.1371/journal.pone.0126231 http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited CC-BY Research Article Text 2015 ftpubmed https://doi.org/10.1371/journal.pone.0126231 2015-05-24T00:08:17Z Climate change is proceeding rapidly at high northern latitudes and may have a variety of direct and indirect effects on aquatic food webs. One predicted effect is the potential shift in phytoplankton community structure towards increased cyanobacterial abundance. Given that cyanobacteria are known to be a nutritionally poor food source, we hypothesized that such a shift would reduce the efficiency of feeding and growth of northern zooplankton. To test this hypothesis, we first isolated a clone of Daphnia pulex from a permafrost thaw pond in subarctic Québec, and confirmed that it was triploid but otherwise genetically similar to a diploid, reference clone of the same species isolated from a freshwater pond in southern Québec. We used a controlled flow-through system to investigate the direct effect of temperature and indirect effect of subarctic picocyanobacteria (Synechococcus) on threshold food concentrations and growth rate of the high latitude clone. We also compared the direct effect of temperature on both Daphnia clones feeding on eukaryotic picoplankton (Nannochloropsis). The high latitude clone had a significantly lower food threshold for growth than the temperate clone at both 18 and 26°C, implying adaptation to lower food availability even under warmer conditions. Polyunsaturated fatty acids were present in the picoeukaryote but not the cyanobacterium, confirming the large difference in food quality. The food threshold for growth of the high latitude Daphnia was 3.7 (18°C) to 4.2 (26°C) times higher when fed Synechococcus versus Nannochloropsis, and there was also a significant negative effect of increased temperature and cyanobacterial food on zooplankton fatty acid content and composition. The combined effect of temperature and food quality on the performance of the high latitude Daphnia was greater than their effects added separately, further indicating the potentially strong indirect effects of climate warming on aquatic food web processes. Text permafrost Subarctic PubMed Central (PMC) PLOS ONE 10 5 e0126231 |
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Research Article Przytulska, Anna Bartosiewicz, Maciej Rautio, Milla Dufresne, France Vincent, Warwick F. Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
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description |
Climate change is proceeding rapidly at high northern latitudes and may have a variety of direct and indirect effects on aquatic food webs. One predicted effect is the potential shift in phytoplankton community structure towards increased cyanobacterial abundance. Given that cyanobacteria are known to be a nutritionally poor food source, we hypothesized that such a shift would reduce the efficiency of feeding and growth of northern zooplankton. To test this hypothesis, we first isolated a clone of Daphnia pulex from a permafrost thaw pond in subarctic Québec, and confirmed that it was triploid but otherwise genetically similar to a diploid, reference clone of the same species isolated from a freshwater pond in southern Québec. We used a controlled flow-through system to investigate the direct effect of temperature and indirect effect of subarctic picocyanobacteria (Synechococcus) on threshold food concentrations and growth rate of the high latitude clone. We also compared the direct effect of temperature on both Daphnia clones feeding on eukaryotic picoplankton (Nannochloropsis). The high latitude clone had a significantly lower food threshold for growth than the temperate clone at both 18 and 26°C, implying adaptation to lower food availability even under warmer conditions. Polyunsaturated fatty acids were present in the picoeukaryote but not the cyanobacterium, confirming the large difference in food quality. The food threshold for growth of the high latitude Daphnia was 3.7 (18°C) to 4.2 (26°C) times higher when fed Synechococcus versus Nannochloropsis, and there was also a significant negative effect of increased temperature and cyanobacterial food on zooplankton fatty acid content and composition. The combined effect of temperature and food quality on the performance of the high latitude Daphnia was greater than their effects added separately, further indicating the potentially strong indirect effects of climate warming on aquatic food web processes. |
format |
Text |
author |
Przytulska, Anna Bartosiewicz, Maciej Rautio, Milla Dufresne, France Vincent, Warwick F. |
author_facet |
Przytulska, Anna Bartosiewicz, Maciej Rautio, Milla Dufresne, France Vincent, Warwick F. |
author_sort |
Przytulska, Anna |
title |
Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
title_short |
Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
title_full |
Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
title_fullStr |
Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
title_full_unstemmed |
Climate Effects on High Latitude Daphnia via Food Quality and Thresholds |
title_sort |
climate effects on high latitude daphnia via food quality and thresholds |
publisher |
Public Library of Science |
publishDate |
2015 |
url |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430472/ http://www.ncbi.nlm.nih.gov/pubmed/25970289 https://doi.org/10.1371/journal.pone.0126231 |
genre |
permafrost Subarctic |
genre_facet |
permafrost Subarctic |
op_relation |
http://www.ncbi.nlm.nih.gov/pmc/articles/PMC4430472/ http://www.ncbi.nlm.nih.gov/pubmed/25970289 http://dx.doi.org/10.1371/journal.pone.0126231 |
op_rights |
http://creativecommons.org/licenses/by/4.0/ This is an open access article distributed under the terms of the Creative Commons Attribution License (http://creativecommons.org/licenses/by/4.0/) , 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.0126231 |
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PLOS ONE |
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10 |
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