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...
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ftcalifstateuniv:oai:scholarworks:n296x189t 2024-09-30T14:40:45+00:00 Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 Maggie D. Johnson Vincent W. Moriarty Robert C. Carpenter 2014 http://hdl.handle.net/10211.3/138685 English eng Public Library of Science http://hdl.handle.net/10211.3/138685 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. Moorea French Polynesia Crustose coralline alga Coral reefs Porolithon onkodes Ocean acidification (OA) Article 2014 ftcalifstateuniv 2024-09-10T17:06:14Z 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 µatm), high (660 µatm), or variable pCO2 (oscillating between 400/660 µatm) 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. PLoS ONE 9(2), e87678. (2014) 1932-6203 Article in Journal/Newspaper Ocean acidification Scholarworks from California State University |
institution |
Open Polar |
collection |
Scholarworks from California State University |
op_collection_id |
ftcalifstateuniv |
language |
English |
topic |
Moorea French Polynesia Crustose coralline alga Coral reefs Porolithon onkodes Ocean acidification (OA) |
spellingShingle |
Moorea French Polynesia Crustose coralline alga Coral reefs Porolithon onkodes Ocean acidification (OA) Maggie D. Johnson Vincent W. Moriarty Robert C. Carpenter Acclimatization of the crustose coralline alga Porolithon onkodes to variable pCO2 |
topic_facet |
Moorea French Polynesia Crustose coralline alga Coral reefs Porolithon onkodes Ocean acidification (OA) |
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 µatm), high (660 µatm), or variable pCO2 (oscillating between 400/660 µatm) 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. PLoS ONE 9(2), e87678. (2014) 1932-6203 |
format |
Article in Journal/Newspaper |
author |
Maggie D. Johnson Vincent W. Moriarty Robert C. Carpenter |
author_facet |
Maggie D. Johnson Vincent W. Moriarty Robert C. Carpenter |
author_sort |
Maggie D. Johnson |
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 |
http://hdl.handle.net/10211.3/138685 |
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. |
_version_ |
1811643227983314944 |