Effects of ocean acidification and warming on the larvae settlement and post-settlement survival of two reef-building corals

Sun Youfang; Jiang Lei; Lei Xinming; Zhang Yuyang; Yu Xiaolei; Huang Hui

doi:10.3969/j.issn.0253-4193.2020.04.011

Volume 42 Issue 4

Nov. 2020

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Sun Youfang，Jiang Lei，Lei Xinming, et al. Effects of ocean acidification and warming on the larvae settlement and post-settlement survival of two reef-building corals[J]. Haiyang Xuebao，2020, 42(4)：96–103，doi:10.3969/j.issn.0253−4193.2020.04.011

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Effects of ocean acidification and warming on the larvae settlement and post-settlement survival of two reef-building corals

doi: 10.3969/j.issn.0253-4193.2020.04.011

Sun Youfang^{1, 2, 3
,},
Jiang Lei^{1, 2},
Lei Xinming^{1, 2},
Zhang Yuyang^{1, 2},
Yu Xiaolei^{1, 2, 3},
Huang Hui^{1, 2, 4
,
,}

1.
Key Laboratory of Tropical Marine Bio-resources and Ecology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
2.
Guangdong Provincial Key Laboratory of Applied Marine Biology, South China Sea Institute of Oceanology, Chinese Academy of Sciences, Guangzhou 510301, China
3.
University of Chinese Academy of Sciences, Beijing 100049, China
4.
Tropical Marine Biological Research Station in Hainan, Chinese Academy of Sciences, Sanya 572000, China

Received Date: 2019-01-16
Rev Recd Date: 2019-05-16

Available Online: 2020-11-18

Publish Date: 2020-04-25

Abstract

Abstract

Ocean acidification and warming are occurring globally through increasing CO₂ absorption into the oceans, and impose two serious and imminent threats to the persistence of scleractinian corals and the reef ecosystem they construct. To evaluate the effects of ocean acidification and warming on the early life stages of the reef-building corals Acropora austera and A. intermedia, their larvae were incubated at a full cross design of two temperatures (about 28℃, about 30℃) and pCO₂ (about 570 μatm, about 1 300 μatm) for 8 d. There were no significant differences in rates of settlement. Larval mortality rates of two reef-building corals were unaffected in any treatments. High pCO₂ significantly reduced post-settlement survival of A. austera but not A. intermedia, with a 25.87% reduction in post-settlement survival in high pCO₂ compared to control. Our results show that larvae settlement and mortality rates of the reef-building corals A. austera and A. intermedia were unaffected by ocean acidification and warming, and high pCO₂ are more detrimental to mortality rates of juvenile A. austera than high temperature. Different species of juvenile corals exhibit species-specific response to ocean acidification and warming, with important implications for coral recruitment and even species structure composition of reef-building corals in the future ocean.
- ocean acidification and warming,
- coral,
- larvae settlement rates,
- mortality,
- post-settlement survival

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References(50)

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