Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2
Ocean acidification (OA) has important implications for the persistence of coral reef ecosystems, due to potentially negative effects on biomineralization. Many coral reefs are dynamic with respect to carbonate chemistry, and experience fluctuations in pCO2 that exceed OA projections for the near fu...
Published in: | Journal of Comparative Physiology B |
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.3/138685 2023-05-15T17:51:06+02:00 Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 Johnson, Maggie D. Moriarty, Vincent W. Carpenter, Robert C. 2014 http://hdl.handle.net/10211.3/138685 en eng Public Library of Science doi.org/10.1010.1371/journal.pone.0087678 PLoS ONE 9(2), e87678. (2014) 1932-6203 http://hdl.handle.net/10211.3/138685 orcid.org/0000-0002-1319-2545 orcid.org/0000-0003-4232-1868 Copyright 2014 Johnson et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original author and source are credited. CC-BY Ocean acidification (OA) Coral reefs Porolithon onkodes Crustose coralline alga Moorea French Polynesia Article 2014 ftcalifstateuniv https://doi.org/10.1010.1371/journal.pone.0087678 2022-04-13T11:17:25Z Ocean acidification (OA) has important implications for the persistence of coral reef ecosystems, due to potentially negative effects on biomineralization. Many coral reefs are dynamic with respect to carbonate chemistry, and experience fluctuations in pCO2 that exceed OA projections for the near future. To understand the influence of dynamic pCO2 on an important reef calcifier, we tested the response of the crustose coralline alga Porolithon onkodes to oscillating pCO2. Individuals were exposed to ambient (400 ??atm), high (660 ??atm), or variable pCO2 (oscillating between 400/660 ??atm) treatments for 14 days. To explore the potential for coralline acclimatization, we collected individuals from low and high pCO2 variability sites (upstream and downstream respectively) on a back reef characterized by unidirectional water flow in Moorea, French Polynesia. We quantified the effects of treatment on algal calcification by measuring the change in buoyant weight, and on algal metabolism by conducting sealed incubations to measure rates of photosynthesis and respiration. Net photosynthesis was higher in the ambient treatment than the variable treatment, regardless of habitat origin, and there was no effect on respiration or gross photosynthesis. Exposure to high pCO2 decreased P. onkodes calcification by >70%, regardless of the original habitat. In the variable treatment, corallines from the high variability habitat calcified 42% more than corallines from the low variability habitat. The significance of the original habitat for the coralline calcification response to variable, high pCO2 indicates that individuals existing in dynamic pCO2 habitats may be acclimatized to OA within the scope of in situ variability. These results highlight the importance of accounting for natural pCO2 variability in OA manipulations, and provide insight into the potential for plasticity in habitat and species-specific responses to changing ocean chemistry. Funding was provided by grants from the National Science Foundation (OCE-0417412, OCE-10-26852, OCE-1041270) and gifts from the Gordon and Betty Moore Foundation. The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. Article in Journal/Newspaper Ocean acidification California State University (CSU): DSpace Journal of Comparative Physiology B 188 5 739 747 |
institution |
Open Polar |
collection |
California State University (CSU): DSpace |
op_collection_id |
ftcalifstateuniv |
language |
English |
topic |
Ocean acidification (OA) Coral reefs Porolithon onkodes Crustose coralline alga Moorea French Polynesia |
spellingShingle |
Ocean acidification (OA) Coral reefs Porolithon onkodes Crustose coralline alga Moorea French Polynesia Johnson, Maggie D. Moriarty, Vincent W. Carpenter, Robert C. Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
topic_facet |
Ocean acidification (OA) Coral reefs Porolithon onkodes Crustose coralline alga Moorea French Polynesia |
description |
Ocean acidification (OA) has important implications for the persistence of coral reef ecosystems, due to potentially negative effects on biomineralization. Many coral reefs are dynamic with respect to carbonate chemistry, and experience fluctuations in pCO2 that exceed OA projections for the near future. To understand the influence of dynamic pCO2 on an important reef calcifier, we tested the response of the crustose coralline alga Porolithon onkodes to oscillating pCO2. Individuals were exposed to ambient (400 ??atm), high (660 ??atm), or variable pCO2 (oscillating between 400/660 ??atm) treatments for 14 days. To explore the potential for coralline acclimatization, we collected individuals from low and high pCO2 variability sites (upstream and downstream respectively) on a back reef characterized by unidirectional water flow in Moorea, French Polynesia. We quantified the effects of treatment on algal calcification by measuring the change in buoyant weight, and on algal metabolism by conducting sealed incubations to measure rates of photosynthesis and respiration. Net photosynthesis was higher in the ambient treatment than the variable treatment, regardless of habitat origin, and there was no effect on respiration or gross photosynthesis. Exposure to high pCO2 decreased P. onkodes calcification by >70%, regardless of the original habitat. In the variable treatment, corallines from the high variability habitat calcified 42% more than corallines from the low variability habitat. The significance of the original habitat for the coralline calcification response to variable, high pCO2 indicates that individuals existing in dynamic pCO2 habitats may be acclimatized to OA within the scope of in situ variability. These results highlight the importance of accounting for natural pCO2 variability in OA manipulations, and provide insight into the potential for plasticity in habitat and species-specific responses to changing ocean chemistry. Funding was provided by grants from the National Science Foundation (OCE-0417412, OCE-10-26852, OCE-1041270) and gifts from the Gordon and Betty Moore Foundation. The funders had no role in the study design, data collection and analysis, decision to publish, or preparation of the manuscript. |
format |
Article in Journal/Newspaper |
author |
Johnson, Maggie D. Moriarty, Vincent W. Carpenter, Robert C. |
author_facet |
Johnson, Maggie D. Moriarty, Vincent W. Carpenter, Robert C. |
author_sort |
Johnson, Maggie D. |
title |
Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
title_short |
Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
title_full |
Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
title_fullStr |
Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
title_full_unstemmed |
Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
title_sort |
acclimatization of the crustose coralline alga porolithon onkodes to variable pco2 |
publisher |
Public Library of Science |
publishDate |
2014 |
url |
http://hdl.handle.net/10211.3/138685 |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi.org/10.1010.1371/journal.pone.0087678 PLoS ONE 9(2), e87678. (2014) 1932-6203 http://hdl.handle.net/10211.3/138685 orcid.org/0000-0002-1319-2545 orcid.org/0000-0003-4232-1868 |
op_rights |
Copyright 2014 Johnson et al. This is an open-access article distributed under the terms of the Creative Commons Attribution License, 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/10.1010.1371/journal.pone.0087678 |
container_title |
Journal of Comparative Physiology B |
container_volume |
188 |
container_issue |
5 |
container_start_page |
739 |
op_container_end_page |
747 |
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1766158112337690624 |