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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Copernicus Publications
2013
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ftnonlinearchiv:oai:noa.gwlb.de:cop_mods_00021292 2023-05-15T17:51:45+02:00 Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef Albright, R. Langdon, C. Anthony, K. R. N. 2013-10 electronic https://doi.org/10.5194/bg-10-6747-2013 https://noa.gwlb.de/receive/cop_mods_00021292 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021247/bg-10-6747-2013.pdf https://bg.copernicus.org/articles/10/6747/2013/bg-10-6747-2013.pdf eng eng Copernicus Publications Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-10-6747-2013 https://noa.gwlb.de/receive/cop_mods_00021292 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021247/bg-10-6747-2013.pdf https://bg.copernicus.org/articles/10/6747/2013/bg-10-6747-2013.pdf uneingeschränkt info:eu-repo/semantics/openAccess article Verlagsveröffentlichung article Text doc-type:article 2013 ftnonlinearchiv https://doi.org/10.5194/bg-10-6747-2013 2022-02-08T22:51:45Z 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, pCO2 ranged from 272 to 542 μatm, and aragonite saturation state (Ωarag) 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 pCO2 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 CaCO3 m−2 h−1 in summer and 8 ± 3 mmol CaCO3 m−2 h−1 in winter, whereas nighttime nec averaged 2 ± 4 mmol and −1 ± 3 mmol CaCO3 m−2 h−1 in summer and winter, respectively. Net ecosystem calcification was highly sensitive to changes in Ωarag for both seasons, indicating that relatively small shifts in Ωarag may drive measurable shifts in calcification rates, and hence carbon budgets, of coral reefs throughout the year. Article in Journal/Newspaper Ocean acidification Niedersächsisches Online-Archiv NOA Biogeosciences 10 10 6747 6758 |
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English |
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article Verlagsveröffentlichung Albright, R. Langdon, C. Anthony, K. R. N. Dynamics of seawater carbonate chemistry, production, and calcification of a coral reef flat, central Great Barrier Reef |
topic_facet |
article Verlagsveröffentlichung |
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, pCO2 ranged from 272 to 542 μatm, and aragonite saturation state (Ωarag) 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 pCO2 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 CaCO3 m−2 h−1 in summer and 8 ± 3 mmol CaCO3 m−2 h−1 in winter, whereas nighttime nec averaged 2 ± 4 mmol and −1 ± 3 mmol CaCO3 m−2 h−1 in summer and winter, respectively. Net ecosystem calcification was highly sensitive to changes in Ωarag for both seasons, indicating that relatively small shifts in Ωarag may drive measurable shifts in calcification rates, and hence carbon budgets, of coral reefs throughout the year. |
format |
Article in Journal/Newspaper |
author |
Albright, R. Langdon, C. Anthony, K. R. N. |
author_facet |
Albright, R. Langdon, C. Anthony, K. R. N. |
author_sort |
Albright, R. |
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://noa.gwlb.de/receive/cop_mods_00021292 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021247/bg-10-6747-2013.pdf https://bg.copernicus.org/articles/10/6747/2013/bg-10-6747-2013.pdf |
genre |
Ocean acidification |
genre_facet |
Ocean acidification |
op_relation |
Biogeosciences -- http://www.bibliothek.uni-regensburg.de/ezeit/?2158181 -- http://www.copernicus.org/EGU/bg/bg.html -- 1726-4189 https://doi.org/10.5194/bg-10-6747-2013 https://noa.gwlb.de/receive/cop_mods_00021292 https://noa.gwlb.de/servlets/MCRFileNodeServlet/cop_derivate_00021247/bg-10-6747-2013.pdf https://bg.copernicus.org/articles/10/6747/2013/bg-10-6747-2013.pdf |
op_rights |
uneingeschränkt info:eu-repo/semantics/openAccess |
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 |
_version_ |
1766159001297354752 |