Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef
Ocean acidification is projected to shift coral reefs from a state of net accretion to one of net dissolution this century. Presently, our ability to predict global-scale changes to coral reef calcification is limited by insufficient data relating seawater carbonate chemistry parameters to in situ r...
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ftdoajarticles:oai:doaj.org/article:71b25b53995c4023823d53c7a772ac7d 2023-05-15T17:51:55+02:00 Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef R. Albright C. Langdon K. R. N. Anthony 2013-10-01T00:00:00Z https://doi.org/10.5194/bg-10-6747-2013 https://doaj.org/article/71b25b53995c4023823d53c7a772ac7d EN eng Copernicus Publications http://www.biogeosciences.net/10/6747/2013/bg-10-6747-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-6747-2013 1726-4170 1726-4189 https://doaj.org/article/71b25b53995c4023823d53c7a772ac7d Biogeosciences, Vol 10, Iss 10, Pp 6747-6758 (2013) Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 article 2013 ftdoajarticles https://doi.org/10.5194/bg-10-6747-2013 2022-12-31T00:36:17Z Ocean acidification is projected to shift coral reefs from a state of net accretion to one of net dissolution this century. Presently, our ability to predict global-scale changes to coral reef calcification is limited by insufficient data relating seawater carbonate chemistry parameters to in situ rates of reef calcification. Here, we investigate diel and seasonal trends in carbonate chemistry of the Davies Reef flat in the central Great Barrier Reef and relate these trends to benthic carbon fluxes by quantifying net ecosystem calcification (nec) and net community production (ncp). Results show that seawater carbonate chemistry of the Davies Reef flat is highly variable over both diel and seasonal cycles. pH (total scale) ranged from 7.92 to 8.17, p CO 2 ranged from 272 to 542 μatm, and aragonite saturation state (Ω arag ) ranged from 2.9 to 4.1. Diel cycles in carbonate chemistry were primarily driven by ncp, and warming explained 35% and 47% of the seasonal shifts in p CO 2 and pH, respectively. Daytime ncp averaged 37 ± 19 mmol C m −2 h −1 in summer and 33 ± 13 mmol C m −2 h −1 in winter; nighttime ncp averaged −30 ± 25 and −7 ± 6 mmol C m −2 h −1 in summer and winter, respectively. Daytime nec averaged 11 ± 4 mmol CaCO 3 m −2 h −1 in summer and 8 ± 3 mmol CaCO 3 m −2 h −1 in winter, whereas nighttime nec averaged 2 ± 4 mmol and −1 ± 3 mmol CaCO 3 m −2 h −1 in summer and winter, respectively. Net ecosystem calcification was highly sensitive to changes in Ω arag for both seasons, indicating that relatively small shifts in Ω arag may drive measurable shifts in calcification rates, and hence carbon budgets, of coral reefs throughout the year. Article in Journal/Newspaper Ocean acidification Directory of Open Access Journals: DOAJ Articles Biogeosciences 10 10 6747 6758 |
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Open Polar |
collection |
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 R. Albright C. Langdon K. R. N. Anthony Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
topic_facet |
Ecology QH540-549.5 Life QH501-531 Geology QE1-996.5 |
description |
Ocean acidification is projected to shift coral reefs from a state of net accretion to one of net dissolution this century. Presently, our ability to predict global-scale changes to coral reef calcification is limited by insufficient data relating seawater carbonate chemistry parameters to in situ rates of reef calcification. Here, we investigate diel and seasonal trends in carbonate chemistry of the Davies Reef flat in the central Great Barrier Reef and relate these trends to benthic carbon fluxes by quantifying net ecosystem calcification (nec) and net community production (ncp). Results show that seawater carbonate chemistry of the Davies Reef flat is highly variable over both diel and seasonal cycles. pH (total scale) ranged from 7.92 to 8.17, p CO 2 ranged from 272 to 542 μatm, and aragonite saturation state (Ω arag ) ranged from 2.9 to 4.1. Diel cycles in carbonate chemistry were primarily driven by ncp, and warming explained 35% and 47% of the seasonal shifts in p CO 2 and pH, respectively. Daytime ncp averaged 37 ± 19 mmol C m −2 h −1 in summer and 33 ± 13 mmol C m −2 h −1 in winter; nighttime ncp averaged −30 ± 25 and −7 ± 6 mmol C m −2 h −1 in summer and winter, respectively. Daytime nec averaged 11 ± 4 mmol CaCO 3 m −2 h −1 in summer and 8 ± 3 mmol CaCO 3 m −2 h −1 in winter, whereas nighttime nec averaged 2 ± 4 mmol and −1 ± 3 mmol CaCO 3 m −2 h −1 in summer and winter, respectively. Net ecosystem calcification was highly sensitive to changes in Ω arag for both seasons, indicating that relatively small shifts in Ω arag may drive measurable shifts in calcification rates, and hence carbon budgets, of coral reefs throughout the year. |
format |
Article in Journal/Newspaper |
author |
R. Albright C. Langdon K. R. N. Anthony |
author_facet |
R. Albright C. Langdon K. R. N. Anthony |
author_sort |
R. Albright |
title |
Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
title_short |
Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
title_full |
Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
title_fullStr |
Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
title_full_unstemmed |
Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
title_sort |
dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central great barrier reef |
publisher |
Copernicus Publications |
publishDate |
2013 |
url |
https://doi.org/10.5194/bg-10-6747-2013 https://doaj.org/article/71b25b53995c4023823d53c7a772ac7d |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_source |
Biogeosciences, Vol 10, Iss 10, Pp 6747-6758 (2013) |
op_relation |
http://www.biogeosciences.net/10/6747/2013/bg-10-6747-2013.pdf https://doaj.org/toc/1726-4170 https://doaj.org/toc/1726-4189 doi:10.5194/bg-10-6747-2013 1726-4170 1726-4189 https://doaj.org/article/71b25b53995c4023823d53c7a772ac7d |
op_doi |
https://doi.org/10.5194/bg-10-6747-2013 |
container_title |
Biogeosciences |
container_volume |
10 |
container_issue |
10 |
container_start_page |
6747 |
op_container_end_page |
6758 |
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1766159216164208640 |