The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point
The objective of this study was to investigate whether a tipping point exists in the calcification responses of coral reef calcifiers to CO 2 . We compared the effects of six partial pressures of CO 2 (P CO2 ) from 28 Pa to 210 Pa on the net calcification of four corals ( Acropora pulchra, Porites r...
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Language: | English |
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Limnology and Oceanography
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ftcalifstateuniv:oai:dspace.calstate.edu:10211.3/138842 2023-05-15T17:50:49+02:00 The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point Carpenter, Robert C. Comeau, Steeve Edmunds, Peter J. Spindel, Nathan B. 2013 http://hdl.handle.net/10211.3/138842 en eng Limnology and Oceanography doi.org/10.4319/lo.2013.58.1.0388 Limnology and Oceanography 58(1), 388-398. (2013) 0024-3590 http://hdl.handle.net/10211.3/138842 orcid.org/0000-0003-4232-1868 Copyright 2013 by the Association for the Sciences of Limnology and Oceanography, Inc. Coral reefs Ocean acidification (OA) Carbon dioxide (CO2) Calcification Acropora pulchra Porites rus Pocillopora damicornis Pavona cactus Hydrolithon onkodes Lithophyllum flavescens Halimeda macroloba Halimeda minima Article 2013 ftcalifstateuniv https://doi.org/10.4319/lo.2013.58.1.0388 2022-04-13T11:17:29Z The objective of this study was to investigate whether a tipping point exists in the calcification responses of coral reef calcifiers to CO 2 . We compared the effects of six partial pressures of CO 2 (P CO2 ) from 28 Pa to 210 Pa on the net calcification of four corals ( Acropora pulchra, Porites rus, Pocillopora damicornis, and Pavona cactus ), and four calcified algae ( Hydrolithon onkodes, Lithophyllum flavescens, Halimeda macroloba, and Halimeda minima ). After 2 weeks of acclimation in a common environment, organisms were incubated in 12 aquaria for 2 weeks at the targeted P CO2 levels and net calcification was quantified. All eight species calcified at the highest P CO2 in which the calcium carbonate aragonite saturation state was ???1. Calcification decreased linearly as a function of increasing partial P CO2 in three corals and three algae. Overall, the decrease in net calcification as a function of decreasing pH was ???10% when ambient P CO2 (39 Pa) was doubled. The calcification responses of P. damicornis and H. macroloba were unaffected by increasing P CO2 . These results are inconsistent with the notion that coral reefs will be affected by rising P CO2 in a response characterized by a tipping point. Instead, our findings combined among taxa suggest a gradual decline in calcification will occur, but this general response includes specific cases of complete resistance to rising P CO2 . Together our results suggest that the overall response of coral reef communities to ocean acidification will be monotonic and inversely proportional to P CO2 , with reef???wide responses dependent on the species composition of calcifying taxa. Article in Journal/Newspaper Ocean acidification California State University (CSU): DSpace Rus’ ENVELOPE(155.950,155.950,54.200,54.200) Limnology and Oceanography 58 1 388 398 |
institution |
Open Polar |
collection |
California State University (CSU): DSpace |
op_collection_id |
ftcalifstateuniv |
language |
English |
topic |
Coral reefs Ocean acidification (OA) Carbon dioxide (CO2) Calcification Acropora pulchra Porites rus Pocillopora damicornis Pavona cactus Hydrolithon onkodes Lithophyllum flavescens Halimeda macroloba Halimeda minima |
spellingShingle |
Coral reefs Ocean acidification (OA) Carbon dioxide (CO2) Calcification Acropora pulchra Porites rus Pocillopora damicornis Pavona cactus Hydrolithon onkodes Lithophyllum flavescens Halimeda macroloba Halimeda minima Carpenter, Robert C. Comeau, Steeve Edmunds, Peter J. Spindel, Nathan B. The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
topic_facet |
Coral reefs Ocean acidification (OA) Carbon dioxide (CO2) Calcification Acropora pulchra Porites rus Pocillopora damicornis Pavona cactus Hydrolithon onkodes Lithophyllum flavescens Halimeda macroloba Halimeda minima |
description |
The objective of this study was to investigate whether a tipping point exists in the calcification responses of coral reef calcifiers to CO 2 . We compared the effects of six partial pressures of CO 2 (P CO2 ) from 28 Pa to 210 Pa on the net calcification of four corals ( Acropora pulchra, Porites rus, Pocillopora damicornis, and Pavona cactus ), and four calcified algae ( Hydrolithon onkodes, Lithophyllum flavescens, Halimeda macroloba, and Halimeda minima ). After 2 weeks of acclimation in a common environment, organisms were incubated in 12 aquaria for 2 weeks at the targeted P CO2 levels and net calcification was quantified. All eight species calcified at the highest P CO2 in which the calcium carbonate aragonite saturation state was ???1. Calcification decreased linearly as a function of increasing partial P CO2 in three corals and three algae. Overall, the decrease in net calcification as a function of decreasing pH was ???10% when ambient P CO2 (39 Pa) was doubled. The calcification responses of P. damicornis and H. macroloba were unaffected by increasing P CO2 . These results are inconsistent with the notion that coral reefs will be affected by rising P CO2 in a response characterized by a tipping point. Instead, our findings combined among taxa suggest a gradual decline in calcification will occur, but this general response includes specific cases of complete resistance to rising P CO2 . Together our results suggest that the overall response of coral reef communities to ocean acidification will be monotonic and inversely proportional to P CO2 , with reef???wide responses dependent on the species composition of calcifying taxa. |
format |
Article in Journal/Newspaper |
author |
Carpenter, Robert C. Comeau, Steeve Edmunds, Peter J. Spindel, Nathan B. |
author_facet |
Carpenter, Robert C. Comeau, Steeve Edmunds, Peter J. Spindel, Nathan B. |
author_sort |
Carpenter, Robert C. |
title |
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
title_short |
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
title_full |
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
title_fullStr |
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
title_full_unstemmed |
The responses of eight coral reef calcifiers to increasing partial pressure of CO2 do not exhibit a tipping point |
title_sort |
responses of eight coral reef calcifiers to increasing partial pressure of co2 do not exhibit a tipping point |
publisher |
Limnology and Oceanography |
publishDate |
2013 |
url |
http://hdl.handle.net/10211.3/138842 |
long_lat |
ENVELOPE(155.950,155.950,54.200,54.200) |
geographic |
Rus’ |
geographic_facet |
Rus’ |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
doi.org/10.4319/lo.2013.58.1.0388 Limnology and Oceanography 58(1), 388-398. (2013) 0024-3590 http://hdl.handle.net/10211.3/138842 orcid.org/0000-0003-4232-1868 |
op_rights |
Copyright 2013 by the Association for the Sciences of Limnology and Oceanography, Inc. |
op_doi |
https://doi.org/10.4319/lo.2013.58.1.0388 |
container_title |
Limnology and Oceanography |
container_volume |
58 |
container_issue |
1 |
container_start_page |
388 |
op_container_end_page |
398 |
_version_ |
1766157723693481984 |