Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2
The threat represented by ocean acidification (OA) for coral reefs has received considerable attention because of the sensitivity of calcifiers to changing seawater carbonate chemistry. However, most studies have focused on the organismic response of calcification to OA, and only a few have addresse...
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ftdoajarticles:oai:doaj.org/article:9b798504bd9141e9b77a7282b3be415c 2023-05-15T17:51:51+02:00 Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 S. Comeau P. J. Edmunds C. A. Lantz R. C. Carpenter 2017-07-01T00:00:00Z https://doi.org/10.5194/bg-14-3549-2017 https://doaj.org/article/9b798504bd9141e9b77a7282b3be415c EN eng Copernicus Publications https://www.biogeosciences.net/14/3549/2017/bg-14-3549-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-14-3549-2017 1726-4170 1726-4189 https://doaj.org/article/9b798504bd9141e9b77a7282b3be415c Biogeosciences, Vol 14, Pp 3549-3560 (2017) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2017 ftdoajarticles https://doi.org/10.5194/bg-14-3549-2017 2022-12-31T01:42:49Z The threat represented by ocean acidification (OA) for coral reefs has received considerable attention because of the sensitivity of calcifiers to changing seawater carbonate chemistry. However, most studies have focused on the organismic response of calcification to OA, and only a few have addressed community-level effects, or investigated parameters other than calcification, such as photosynthesis. Light (photosynthetically active radiation, PAR) is a driver of biological processes on coral reefs, and the possibility that these processes might be perturbed by OA has important implications for community function. Here we investigate how CO 2 enrichment affects the relationships between PAR and community net O 2 production ( P net ), and between PAR and community net calcification ( G net ), using experiments on three coral communities constructed to match (i) the back reef of Mo'orea, French Polynesia, (ii) the fore reef of Mo'orea, and (iii) the back reef of O'ahu, Hawaii. The results were used to test the hypothesis that OA affects the relationship between P net and G net . For the three communities tested, p CO 2 did not affect the P net –PAR relationship, but it affected the intercept of the hyperbolic tangent curve fitting the G net –PAR relationship for both reef communities in Mo'orea (but not in O'ahu). For the three communities, the slopes of the linear relationships between P net and G net were not affected by OA, although the intercepts were depressed by the inhibitory effect of high p CO 2 on G net . Our result indicates that OA can modify the balance between net calcification and net photosynthesis of reef communities by depressing community calcification, but without affecting community photosynthesis. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 14 14 3549 3560 |
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Directory of Open Access Journals: DOAJ Articles |
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ftdoajarticles |
language |
English |
topic |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
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Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 S. Comeau P. J. Edmunds C. A. Lantz R. C. Carpenter Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
The threat represented by ocean acidification (OA) for coral reefs has received considerable attention because of the sensitivity of calcifiers to changing seawater carbonate chemistry. However, most studies have focused on the organismic response of calcification to OA, and only a few have addressed community-level effects, or investigated parameters other than calcification, such as photosynthesis. Light (photosynthetically active radiation, PAR) is a driver of biological processes on coral reefs, and the possibility that these processes might be perturbed by OA has important implications for community function. Here we investigate how CO 2 enrichment affects the relationships between PAR and community net O 2 production ( P net ), and between PAR and community net calcification ( G net ), using experiments on three coral communities constructed to match (i) the back reef of Mo'orea, French Polynesia, (ii) the fore reef of Mo'orea, and (iii) the back reef of O'ahu, Hawaii. The results were used to test the hypothesis that OA affects the relationship between P net and G net . For the three communities tested, p CO 2 did not affect the P net –PAR relationship, but it affected the intercept of the hyperbolic tangent curve fitting the G net –PAR relationship for both reef communities in Mo'orea (but not in O'ahu). For the three communities, the slopes of the linear relationships between P net and G net were not affected by OA, although the intercepts were depressed by the inhibitory effect of high p CO 2 on G net . Our result indicates that OA can modify the balance between net calcification and net photosynthesis of reef communities by depressing community calcification, but without affecting community photosynthesis. |
format |
Article in Journal/Newspaper |
author |
S. Comeau P. J. Edmunds C. A. Lantz R. C. Carpenter |
author_facet |
S. Comeau P. J. Edmunds C. A. Lantz R. C. Carpenter |
author_sort |
S. Comeau |
title |
Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
title_short |
Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
title_full |
Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
title_fullStr |
Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
title_full_unstemmed |
Daily variation in net primary production and net calcification in coral reef communities exposed to elevated p CO 2 |
title_sort |
daily variation in net primary production and net calcification in coral reef communities exposed to elevated p co 2 |
publisher |
Copernicus Publications |
publishDate |
2017 |
url |
https://doi.org/10.5194/bg-14-3549-2017 https://doaj.org/article/9b798504bd9141e9b77a7282b3be415c |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Biogeosciences, Vol 14, Pp 3549-3560 (2017) |
op_relation |
https://www.biogeosciences.net/14/3549/2017/bg-14-3549-2017.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-14-3549-2017 1726-4170 1726-4189 https://doaj.org/article/9b798504bd9141e9b77a7282b3be415c |
op_doi |
https://doi.org/10.5194/bg-14-3549-2017 |
container_title |
Biogeosciences |
container_volume |
14 |
container_issue |
14 |
container_start_page |
3549 |
op_container_end_page |
3560 |
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1766159116331384832 |