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Impact of diurnal temperature fluctuations on larval settlement and growth of the reef coral Pocillopora damicornis
Jiang, L; Sun, YF; Zhang, YY; Zhou, GW; Li, XB; McCook, LJ; Lian, JS; Lei, XM; Liu, S; Cai, L; Qian, PY; Huang, H; boqianpy@ust.hk; huanghui@scsio.ac.cn
2018
Source PublicationBIOGEOSCIENCES
Volume14Issue:24Pages:5741-5752
AbstractDiurnal fluctuations in seawater temperature are ubiquitous on tropical reef flats. However, the effects of such dynamic temperature variations on the early stages of corals are poorly understood. In this study, we investigated the responses of larvae and new recruits of Pocillopora damicornis to two constant temperature treatments (29 and 31 degrees C) and two diurnally fluctuating treatments (28-31 and 30-33 degrees C with daily means of 29 and 31 degrees C, respectively) simulating the 3 degrees C diel oscillations at 3m depth on the Luhuitou fringing reef (Sanya, China). Results showed that the thermal stress on settlement at 31 degrees C was almost negated by the fluctuating treatment. Further, neither elevated temperature nor temperature fluctuations caused bleaching responses in recruits, while the maximum excitation pressure over photosystem II (PSII) was reduced under fluctuating temperatures. Although early growth and development were highly stimulated at 31 degrees C, oscillations of 3 degrees C had little effects on budding and lateral growth at either mean temperature. Nevertheless, daytime encounters with the maximum temperature of 33 degrees C in fluctuating 31 degrees C elicited a notable reduction in calcification compared to constant 31 degrees C. These results underscore the complexity of the effects caused by diel temperature fluctuations on early stages of corals and suggest that ecologically relevant temperature variability could buffer warming stress on larval settlement and dampen the positive effects of increased temperatures on coral growth.
Department[Jiang, Lei; Sun, You-Fang; Zhang, Yu-Yang; Zhou, Guo-Wei; Li, Xiu-Bao; McCook, Laurence J.; Lian, Jian-Sheng; Lei, Xin-Ming; Liu, Sheng; Huang, Hui] Chinese Acad Sci, South China Sea Inst Oceanol, Key Lab Trop Marine Bioresources & Ecol, Guangdong Prov Key Lab Appl Marine Biol, Guangzhou 510301, Guangdong, Peoples R China; [Jiang, Lei; Sun, You-Fang; Zhou, Guo-Wei; Huang, Hui] Chinese Acad Sci, Trop Marine Biol Res Stn Hainan, Sanya 572000, Peoples R China; [Jiang, Lei; Sun, You-Fang] Univ Chinese Acad Sci, Beijing 100049, Peoples R China; [McCook, Laurence J.] James Cook Univ, ARC Ctr Excellence Coral Reef Studies, Townsville, Qld, Australia; [Cai, Lin; Qian, Pei-Yuan] Hong Kong Univ Sci & Technol, Shenzhen Res Inst, Hong Kong, Hong Kong, Peoples R China; [Cai, Lin; Qian, Pei-Yuan] Hong Kong Univ Sci & Technol, Div Life Sci, Hong Kong, Hong Kong, Peoples R China
Subject AreaEnvironmental Sciences & Ecology ; Geology
Funding ProjectLMB
Document Type期刊论文
Identifierhttp://ir.scsio.ac.cn/handle/344004/17036
Collection中科院海洋生物资源可持续利用重点实验室
Corresponding Authorboqianpy@ust.hk; huanghui@scsio.ac.cn
Recommended Citation
GB/T 7714
Jiang, L,Sun, YF,Zhang, YY,et al. Impact of diurnal temperature fluctuations on larval settlement and growth of the reef coral Pocillopora damicornis[J]. BIOGEOSCIENCES,2018,14(24):5741-5752.
APA Jiang, L.,Sun, YF.,Zhang, YY.,Zhou, GW.,Li, XB.,...&huanghui@scsio.ac.cn.(2018).Impact of diurnal temperature fluctuations on larval settlement and growth of the reef coral Pocillopora damicornis.BIOGEOSCIENCES,14(24),5741-5752.
MLA Jiang, L,et al."Impact of diurnal temperature fluctuations on larval settlement and growth of the reef coral Pocillopora damicornis".BIOGEOSCIENCES 14.24(2018):5741-5752.
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