干旱区生态环境知识资源中心(Arid): Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia

Arid

DOI	10.1016/j.marenvres.2022.105851
	Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia
	Godefroid, Mathilde; Dubois, Philippe; Under Pole Consortiumb, Laetitia; Hedouin, Laetitia
通讯作者	Godefroid, M
来源期刊	MARINE ENVIRONMENTAL RESEARCH
ISSN	0141-1136
EISSN	1879-0291
出版年	2023
卷号	184
英文摘要	Local thermal environment has a strong influence on the physiology of marine ectotherms. This is particularly relevant for tropical organisms living close to their thermal optimum, well exemplified by the increasing fre-quency of bleaching occurrence in shallow-water corals. Mesophotic Coral Ecosystems (MCEs) were suggested as potential oases, especially when they are submitted to internal waves inducing short-term cooling events. Indeed, probability of bleaching occurrence in scleractinians was reported to decrease with depth in Mo'orea as tem-perature variability increases. However, ecophysiological data are currently lacking to understand the cause of lower susceptibility/increased plasticity of deeper corals. A growing interest has been devoted the last decade to MCEs, but our understanding of the physiological performance of benthic organisms living in this environment remains relatively unexplored. To tackle that question, we first compared the metabolic responses (dark respi-ration, net photosynthesis and photosynthetic efficiency) of the depth-generalist scleractinian Pachyseris speciosa from two heterogeneous thermal environment (25 and 85 m depths) to acute heat stress to determine if the local thermal environment could predict coral response to warming. Then, we tested the thermal performance of two sympatric species (the scleractinian P. speciosa and the antipatharian Stichopathes sp.) to determine if there are inter-species differences in performances in species experiencing identical levels of temperature variability, at mesophotic depths (85 m). Results revealed broader thermal performances in the mesophotic P. speciosa compared to mid-depth ones, and constrained performances in the mesophotic antipatharian compared to the scleractinian species. We hypothesize that the high fluctuations in temperature due to internal waves in deeper areas contribute to the broader thermal performances of mesophotic P. speciosa. However, the constrained performances of the mesophotic antipatharian compared to P. speciosa suggests that other processes than the symbiosis with zooxanthellae also influence thermal performances of these mesophotic organisms. Our results supported that Stichopathes sp. lives close to its thermal optimum, suggesting a (relatively) cold thermal specialist strategy. In this context, composition of MCEs in the future is unlikely to shift to antipatharian-dominated landscape and will remain coral-dominated landscape.
英文关键词	Global warming Thermal acclimatization Mesophotic Scleractinian Antipatharian Performance curve Environmental variability
类型	Article
语种	英语
开放获取类型	Green Submitted
收录类别	SCI-E
WOS记录号	WOS:000918365700001
WOS关键词	MUSTARD HILL CORAL ; MOUNTAIN PASSES ; ECOLOGY ; PHOTOSYNTHESIS ; POPULATIONS ; PLASTICITY ; TEMPERATE ; TOLERANCE ; CURVES ; REEFS
WOS类目	Environmental Sciences ; Marine & Freshwater Biology ; Toxicology
WOS研究方向	Environmental Sciences & Ecology ; Marine & Freshwater Biology ; Toxicology
资源类型	期刊论文
条目标识符	http://119.78.100.177/qdio/handle/2XILL650/397805
推荐引用方式 GB/T 7714	Godefroid, Mathilde,Dubois, Philippe,Under Pole Consortiumb, Laetitia,et al. Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia[J],2023,184.
APA	Godefroid, Mathilde,Dubois, Philippe,Under Pole Consortiumb, Laetitia,&Hedouin, Laetitia.(2023).Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia.MARINE ENVIRONMENTAL RESEARCH,184.
MLA	Godefroid, Mathilde,et al."Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia".MARINE ENVIRONMENTAL RESEARCH 184(2023).