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Framework of barrier reefs threatened by ocean acidification.
Glob Chang Biol. 2016 Mar; 22(3):1225-34.GC

Abstract

To date, studies of ocean acidification (OA) on coral reefs have focused on organisms rather than communities, and the few community effects that have been addressed have focused on shallow back reef habitats. The effects of OA on outer barrier reefs, which are the most striking of coral reef habitats and are functionally and physically different from back reefs, are unknown. Using 5-m long outdoor flumes to create treatment conditions, we constructed coral reef communities comprised of calcified algae, corals, and reef pavement that were assembled to match the community structure at 17 m depth on the outer barrier reef of Moorea, French Polynesia. Communities were maintained under ambient and 1200 μatm pCO2 for 7 weeks, and net calcification rates were measured at different flow speeds. Community net calcification was significantly affected by OA, especially at night when net calcification was depressed ~78% compared to ambient pCO2 . Flow speed (2-14 cm s(-1)) enhanced net calcification only at night under elevated pCO2 . Reef pavement also was affected by OA, with dissolution ~86% higher under elevated pCO2 compared to ambient pCO2 . These results suggest that net accretion of outer barrier reef communities will decline under OA conditions predicted within the next 100 years, largely because of increased dissolution of reef pavement. Such extensive dissolution poses a threat to the carbonate foundation of barrier reef communities.

Authors+Show Affiliations

Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA. ARC Centre of Excellence in Coral Reef Studies, The University of Western Australia, School of Earth & Environment & Ocean's Institute, Western Australia 6009, Australia.Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA. ARC Centre of Excellence in Coral Reef Studies, The University of Western Australia, School of Earth & Environment & Ocean's Institute, Western Australia 6009, Australia.Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA. ARC Centre of Excellence in Coral Reef Studies, The University of Western Australia, School of Earth & Environment & Ocean's Institute, Western Australia 6009, Australia.Department of Biology, California State University, 18111 Nordhoff Street, Northridge, CA, 91330-8303, USA. ARC Centre of Excellence in Coral Reef Studies, The University of Western Australia, School of Earth & Environment & Ocean's Institute, Western Australia 6009, Australia.

Pub Type(s)

Journal Article
Research Support, Non-U.S. Gov't
Research Support, U.S. Gov't, Non-P.H.S.

Language

eng

PubMed ID

26154126

Citation

Comeau, Steeve, et al. "Framework of Barrier Reefs Threatened By Ocean Acidification." Global Change Biology, vol. 22, no. 3, 2016, pp. 1225-34.
Comeau S, Lantz CA, Edmunds PJ, et al. Framework of barrier reefs threatened by ocean acidification. Glob Chang Biol. 2016;22(3):1225-34.
Comeau, S., Lantz, C. A., Edmunds, P. J., & Carpenter, R. C. (2016). Framework of barrier reefs threatened by ocean acidification. Global Change Biology, 22(3), 1225-34. https://doi.org/10.1111/gcb.13023
Comeau S, et al. Framework of Barrier Reefs Threatened By Ocean Acidification. Glob Chang Biol. 2016;22(3):1225-34. PubMed PMID: 26154126.
* Article titles in AMA citation format should be in sentence-case
TY - JOUR T1 - Framework of barrier reefs threatened by ocean acidification. AU - Comeau,Steeve, AU - Lantz,Coulson A, AU - Edmunds,Peter J, AU - Carpenter,Robert C, Y1 - 2016/01/04/ PY - 2015/01/31/received PY - 2015/05/29/accepted PY - 2015/7/9/entrez PY - 2015/7/15/pubmed PY - 2016/11/3/medline KW - calcification KW - coralline algae KW - corals KW - flow KW - fore reef KW - ocean acidification KW - reef pavement SP - 1225 EP - 34 JF - Global change biology JO - Glob Chang Biol VL - 22 IS - 3 N2 - To date, studies of ocean acidification (OA) on coral reefs have focused on organisms rather than communities, and the few community effects that have been addressed have focused on shallow back reef habitats. The effects of OA on outer barrier reefs, which are the most striking of coral reef habitats and are functionally and physically different from back reefs, are unknown. Using 5-m long outdoor flumes to create treatment conditions, we constructed coral reef communities comprised of calcified algae, corals, and reef pavement that were assembled to match the community structure at 17 m depth on the outer barrier reef of Moorea, French Polynesia. Communities were maintained under ambient and 1200 μatm pCO2 for 7 weeks, and net calcification rates were measured at different flow speeds. Community net calcification was significantly affected by OA, especially at night when net calcification was depressed ~78% compared to ambient pCO2 . Flow speed (2-14 cm s(-1)) enhanced net calcification only at night under elevated pCO2 . Reef pavement also was affected by OA, with dissolution ~86% higher under elevated pCO2 compared to ambient pCO2 . These results suggest that net accretion of outer barrier reef communities will decline under OA conditions predicted within the next 100 years, largely because of increased dissolution of reef pavement. Such extensive dissolution poses a threat to the carbonate foundation of barrier reef communities. SN - 1365-2486 UR - https://www.unboundmedicine.com/medline/citation/26154126/Framework_of_barrier_reefs_threatened_by_ocean_acidification_ L2 - https://doi.org/10.1111/gcb.13023 DB - PRIME DP - Unbound Medicine ER -