Coral responses to ocean warming and acidification: Implications for future distribution of coral reefs in the South China Sea

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December 13, 2019 - 2:16pm
Type: Journal Article
Year of publication: 2019
Date published: 01/2019
Authors: Xiangcheng Yuan, Yajuan Guo, Wei-Jun Cai, Hui Huang, Weihua Zhou, Sheng Liu
Journal title: Marine Pollution Bulletin
Volume: 138
Pages: 241 - 248
ISSN: 0025326X

The annual sea surface temperature increased at a rate of 0.038 to 0.074 °C/year in recent decade, and pH decreased at a rate of 0.012–0.014/year in two coastal waters of the South China Sea. Therefore, a culture experiment was conducted to study the effects of acidification and warming on coral calcification rates. The calcification of three coral species were significantly reduced during the exposure to elevated CO2, while other three coral species were not significantly affected. The reef coral Pocillopora damicornis was resistant to high CO2, but was not able to survive during the exposure to 33 °C in our culture experiments. Our findings suggested that some corals might not survive in tropical areas if coral could not adapt to warming rapidly, and subtropical coastal waters with temperature of <30 °C will serve as refugia for the corals resistant to high CO2 at the end of this century.

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