Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia.
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| Title: | Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia. |
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| Authors: | Godefroid, Mathilde1 (AUTHOR) godefroid.mathilde1@gmail.com, Dubois, Philippe1 (AUTHOR), Hédouin, Laetitia2,3 (AUTHOR) |
| Source: | Marine Environmental Research. Feb2023, Vol. 184, pN.PAG-N.PAG. 1p. |
| Subjects: | Coral bleaching, Deep-sea corals, Species, Scleractinia, Internal waves, High temperatures, Symbiosis |
| Geographic Terms: | French Polynesia |
| Abstract: | 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 frequency 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 temperature 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 respiration, 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. [Display omitted] • P. speciosa has broader thermal performance at 85 than 25 m. • Thermal regime likely explains depth-specific thermal performance for P. speciosa. • At 85 m depth, thermal performance is narrower for Stichopathes sp. than for P. speciosa. • Cooling events generated by internal waves do not always improve thermotolerance. • Stichopathes sp. at 85 m lives close to its thermal optimum. [ABSTRACT FROM AUTHOR] |
| Copyright of Marine Environmental Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.) | |
| Database: | Engineering Source |
| FullText | Text: Availability: 0 |
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| Header | DbId: egs DbLabel: Engineering Source An: 161400805 AccessLevel: 6 PubType: Academic Journal PubTypeId: academicJournal PreciseRelevancyScore: 0 |
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| Items | – Name: Title Label: Title Group: Ti Data: Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia. – Name: Author Label: Authors Group: Au Data: <searchLink fieldCode="AR" term="%22Godefroid%2C+Mathilde%22">Godefroid, Mathilde</searchLink><relatesTo>1</relatesTo> (AUTHOR)<i> godefroid.mathilde1@gmail.com</i><br /><searchLink fieldCode="AR" term="%22Dubois%2C+Philippe%22">Dubois, Philippe</searchLink><relatesTo>1</relatesTo> (AUTHOR)<br /><searchLink fieldCode="AR" term="%22Hédouin%2C+Laetitia%22">Hédouin, Laetitia</searchLink><relatesTo>2,3</relatesTo> (AUTHOR) – Name: TitleSource Label: Source Group: Src Data: <searchLink fieldCode="JN" term="%22Marine+Environmental+Research%22">Marine Environmental Research</searchLink>. Feb2023, Vol. 184, pN.PAG-N.PAG. 1p. – Name: Subject Label: Subjects Group: Su Data: <searchLink fieldCode="DE" term="%22Coral+bleaching%22">Coral bleaching</searchLink><br /><searchLink fieldCode="DE" term="%22Deep-sea+corals%22">Deep-sea corals</searchLink><br /><searchLink fieldCode="DE" term="%22Species%22">Species</searchLink><br /><searchLink fieldCode="DE" term="%22Scleractinia%22">Scleractinia</searchLink><br /><searchLink fieldCode="DE" term="%22Internal+waves%22">Internal waves</searchLink><br /><searchLink fieldCode="DE" term="%22High+temperatures%22">High temperatures</searchLink><br /><searchLink fieldCode="DE" term="%22Symbiosis%22">Symbiosis</searchLink> – Name: SubjectGeographic Label: Geographic Terms Group: Su Data: <searchLink fieldCode="DE" term="%22French+Polynesia%22">French Polynesia</searchLink> – Name: Abstract Label: Abstract Group: Ab Data: 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 frequency 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 temperature 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 respiration, 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. [Display omitted] • P. speciosa has broader thermal performance at 85 than 25 m. • Thermal regime likely explains depth-specific thermal performance for P. speciosa. • At 85 m depth, thermal performance is narrower for Stichopathes sp. than for P. speciosa. • Cooling events generated by internal waves do not always improve thermotolerance. • Stichopathes sp. at 85 m lives close to its thermal optimum. [ABSTRACT FROM AUTHOR] – Name: AbstractSuppliedCopyright Label: Group: Ab Data: <i>Copyright of Marine Environmental Research is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites without the copyright holder's express written permission. Additionally, content may not be used with any artificial intelligence tools or machine learning technologies. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract.</i> (Copyright applies to all Abstracts.) |
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| RecordInfo | BibRecord: BibEntity: Identifiers: – Type: doi Value: 10.1016/j.marenvres.2022.105851 Languages: – Code: eng Text: English PhysicalDescription: Pagination: PageCount: 1 StartPage: N.PAG Subjects: – SubjectFull: Coral bleaching Type: general – SubjectFull: Deep-sea corals Type: general – SubjectFull: Species Type: general – SubjectFull: Scleractinia Type: general – SubjectFull: Internal waves Type: general – SubjectFull: High temperatures Type: general – SubjectFull: Symbiosis Type: general – SubjectFull: French Polynesia Type: general Titles: – TitleFull: Thermal performance with depth: Comparison of a mesophotic scleractinian and an antipatharian species subjected to internal waves in Mo'orea, French Polynesia. Type: main BibRelationships: HasContributorRelationships: – PersonEntity: Name: NameFull: Godefroid, Mathilde – PersonEntity: Name: NameFull: Dubois, Philippe – PersonEntity: Name: NameFull: Hédouin, Laetitia IsPartOfRelationships: – BibEntity: Dates: – D: 01 M: 02 Text: Feb2023 Type: published Y: 2023 Identifiers: – Type: issn-print Value: 01411136 Numbering: – Type: volume Value: 184 Titles: – TitleFull: Marine Environmental Research Type: main |
| ResultId | 1 |
