Physiological diversity among sympatric, conspecific endosymbionts of coral (Cladocopium C1<sup>acro</sup>) from the Great Barrier Reef

Beltrán, VH; Puill-Stephan, E; Howells, E; Flores-Moya, A; Doblin, M; Núñez-Lara, E; Escamilla, V; López, T; van Oppen, MJH

Physiological diversity among sympatric, conspecific endosymbionts of coral (Cladocopium C1<sup>acro</sup>) from the Great Barrier Reef

Beltrán, VH Puill-Stephan, E Howells, E Flores-Moya, A Doblin, M

Núñez-Lara, E Escamilla, V López, T van Oppen, MJH

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Publisher:: Springer Science and Business Media LLC
Publication Type:: Journal Article
Citation:: Coral Reefs, 2021, 40, (4), pp. 985-997
Issue Date:: 2021-08-01

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Field	Value	Language
dc.contributor.author	Beltrán, VH
dc.contributor.author	Puill-Stephan, E
dc.contributor.author	Howells, E
dc.contributor.author	Flores-Moya, A
dc.contributor.author	Doblin, M https://orcid.org/0000-0001-8750-3433
dc.contributor.author	Núñez-Lara, E
dc.contributor.author	Escamilla, V
dc.contributor.author	López, T
dc.contributor.author	van Oppen, MJH
dc.date.accessioned	2022-02-13T20:08:00Z
dc.date.available	2022-02-13T20:08:00Z
dc.date.issued	2021-08-01
dc.identifier.citation	Coral Reefs, 2021, 40, (4), pp. 985-997
dc.identifier.issn	0722-4028
dc.identifier.issn	1432-0975
dc.identifier.uri	http://hdl.handle.net/10453/154452
dc.description.abstract	Most of the scleractinian corals living in the photic zone form an obligate symbiosis with dinoflagellates in the family Symbiodiniaceae that promotes reef accretion and niche diversification. However, sea surface temperature surpassing the normal summer average disrupts the symbioses, resulting in coral bleaching and mortality. Under climate warming, temperature anomalies and associated coral bleaching events will increase in frequency and severity. Therefore, it is imperative to better understand the variability in key phenotypic traits of the coral-Symbiodiniaceae association under such high temperature stress. Here, we describe the extent of genetically fixed differences in the in vitro acclimatory response of four conspecific strains of the common coral endosymbiont, Cladocopium C1acro. (formerly Symbiodinium type C1); these strains were isolated from Acropora corals from inshore sites on the Great Barrier Reef. We characterised algal growth and thylakoid membrane stability under different thermal scenarios and demonstrate previously undocumented physiological diversity among strains of a single Symbiodiniaceae species. Our results have important implications in terms of the perceived accuracy by which environmental stress tolerance of the coral holobiont can be predicted, potentially explaining patchiness in a coral community during bleaching based on the dominant Symbiodiniaceae genotype harboured by the host.
dc.language	en
dc.publisher	Springer Science and Business Media LLC
dc.relation.ispartof	Coral Reefs
dc.relation.isbasedon	10.1007/s00338-021-02092-z
dc.rights	info:eu-repo/semantics/closedAccess
dc.subject	04 Earth Sciences, 05 Environmental Sciences, 06 Biological Sciences
dc.subject.classification	Marine Biology & Hydrobiology
dc.title	Physiological diversity among sympatric, conspecific endosymbionts of coral (Cladocopium C1<sup>acro</sup>) from the Great Barrier Reef
dc.type	Journal Article
utslib.citation.volume	40
utslib.for	04 Earth Sciences
utslib.for	05 Environmental Sciences
utslib.for	06 Biological Sciences
pubs.organisational-group	/University of Technology Sydney
pubs.organisational-group	/University of Technology Sydney/Faculty of Science
pubs.organisational-group	/University of Technology Sydney/Strength - C3 - Climate Change Cluster
utslib.copyright.status	closed_access	*
dc.date.updated	2022-02-13T20:07:59Z
pubs.issue	4
pubs.publication-status	Published
pubs.volume	40
utslib.citation.issue	4

Abstract:

Most of the scleractinian corals living in the photic zone form an obligate symbiosis with dinoflagellates in the family Symbiodiniaceae that promotes reef accretion and niche diversification. However, sea surface temperature surpassing the normal summer average disrupts the symbioses, resulting in coral bleaching and mortality. Under climate warming, temperature anomalies and associated coral bleaching events will increase in frequency and severity. Therefore, it is imperative to better understand the variability in key phenotypic traits of the coral-Symbiodiniaceae association under such high temperature stress. Here, we describe the extent of genetically fixed differences in the in vitro acclimatory response of four conspecific strains of the common coral endosymbiont, Cladocopium C1acro. (formerly Symbiodinium type C1); these strains were isolated from Acropora corals from inshore sites on the Great Barrier Reef. We characterised algal growth and thylakoid membrane stability under different thermal scenarios and demonstrate previously undocumented physiological diversity among strains of a single Symbiodiniaceae species. Our results have important implications in terms of the perceived accuracy by which environmental stress tolerance of the coral holobiont can be predicted, potentially explaining patchiness in a coral community during bleaching based on the dominant Symbiodiniaceae genotype harboured by the host.

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http://hdl.handle.net/10453/154452