Rapid Shifts in Bacterial Communities and Homogeneity of Symbiodiniaceae in Colonies of Pocillopora acuta Transplanted Between Reef and Mangrove Environments

Haydon, TD; Seymour, JR; Raina, J-B; Edmondson, J; Siboni, N; Matthews, JL; Camp, EF; Suggett, DJ

Rapid Shifts in Bacterial Communities and Homogeneity of Symbiodiniaceae in Colonies of Pocillopora acuta Transplanted Between Reef and Mangrove Environments

Haydon, TD Seymour, JR Raina, J-B Edmondson, J Siboni, N Matthews, JL Camp, EF Suggett, DJ

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Publisher:: Frontiers Media SA
Publication Type:: Journal Article
Citation:: Frontiers in Microbiology, 2021, 12, pp. 756091
Issue Date:: 2021-10-25

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Field	Value	Language
dc.contributor.author	Haydon, TD
dc.contributor.author	Seymour, JR
dc.contributor.author	Raina, J-B
dc.contributor.author	Edmondson, J
dc.contributor.author	Siboni, N
dc.contributor.author	Matthews, JL
dc.contributor.author	Camp, EF
dc.contributor.author	Suggett, DJ
dc.date.accessioned	2021-11-12T01:39:23Z
dc.date.available	2021-11-12T01:39:23Z
dc.date.issued	2021-10-25
dc.identifier.citation	Frontiers in Microbiology, 2021, 12, pp. 756091
dc.identifier.issn	1664-302X
dc.identifier.issn	1664-302X
dc.identifier.uri	http://hdl.handle.net/10453/151519
dc.description.abstract	<jats:p>It has been proposed that an effective approach for predicting whether and how reef-forming corals persist under future climate change is to examine populations thriving in present day extreme environments, such as mangrove lagoons, where water temperatures can exceed those of reef environments by more than 3°C, pH levels are more acidic (pH &lt; 7.9, often below 7.6) and O<jats:sub>2</jats:sub> concentrations are regularly considered hypoxic (&lt;2 mg/L). Defining the physiological features of these “extreme” corals, as well as their relationships with the, often symbiotic, organisms within their microbiome, could increase our understanding of how corals will persist into the future. To better understand coral-microbe relationships that potentially underpin coral persistence within extreme mangrove environments, we therefore conducted a 9-month reciprocal transplant experiment, whereby specimens of the coral <jats:italic>Pocillopora acuta</jats:italic> were transplanted between adjacent mangrove and reef sites on the northern Great Barrier Reef. Bacterial communities associated with <jats:italic>P. acuta</jats:italic> specimens native to the reef environment were dominated by <jats:italic>Endozoicomonas</jats:italic>, while Symbiodiniaceae communities were dominated by members of the <jats:italic>Cladocopium</jats:italic> genus. In contrast, <jats:italic>P. acuta</jats:italic> colonies native to the mangrove site exhibited highly diverse bacterial communities with no dominating members, and Symbiodiniaceae communities dominated by <jats:italic>Durusdinium.</jats:italic> All corals survived for 9 months after being transplanted from reef-to-mangrove, mangrove-to-reef environments (as well as control within environment transplants), and during this time there were significant changes in the bacterial communities, but not in the Symbiodiniaceae communities or their photo-physiological functioning. In reef-to-mangrove transplanted corals, there were varied, but sometimes rapid shifts in the associated bacterial communities, including a loss of “core” bacterial members after 9 months where coral bacterial communities began to resemble those of the native mangrove corals. Bacterial communities associated with mangrove-to-reef <jats:italic>P. acuta</jats:italic> colonies also changed from their original composition, but remained different to the native reef corals. Our data demonstrates that <jats:italic>P. acuta</jats:italic> associated bacterial communities are strongly influenced by changes in environmental conditions, whereas Symbiodiniaceae associated communities remain highly stable.</jats:p>
dc.language	en
dc.publisher	Frontiers Media SA
dc.relation.ispartof	Frontiers in Microbiology
dc.relation.isbasedon	10.3389/fmicb.2021.756091
dc.rights	info:eu-repo/semantics/openAccess
dc.subject	0502 Environmental Science and Management, 0503 Soil Sciences, 0605 Microbiology
dc.title	Rapid Shifts in Bacterial Communities and Homogeneity of Symbiodiniaceae in Colonies of Pocillopora acuta Transplanted Between Reef and Mangrove Environments
dc.type	Journal Article
utslib.citation.volume	12
utslib.for	0502 Environmental Science and Management
utslib.for	0503 Soil Sciences
utslib.for	0605 Microbiology
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	open_access	*
dc.date.updated	2021-11-12T01:39:22Z
pubs.publication-status	Published online
pubs.volume	12

Abstract:

It has been proposed that an effective approach for predicting whether and how reef-forming corals persist under future climate change is to examine populations thriving in present day extreme environments, such as mangrove lagoons, where water temperatures can exceed those of reef environments by more than 3°C, pH levels are more acidic (pH < 7.9, often below 7.6) and O2 concentrations are regularly considered hypoxic (<2 mg/L). Defining the physiological features of these “extreme” corals, as well as their relationships with the, often symbiotic, organisms within their microbiome, could increase our understanding of how corals will persist into the future. To better understand coral-microbe relationships that potentially underpin coral persistence within extreme mangrove environments, we therefore conducted a 9-month reciprocal transplant experiment, whereby specimens of the coral Pocillopora acuta were transplanted between adjacent mangrove and reef sites on the northern Great Barrier Reef. Bacterial communities associated with P. acuta specimens native to the reef environment were dominated by Endozoicomonas, while Symbiodiniaceae communities were dominated by members of the Cladocopium genus. In contrast, P. acuta colonies native to the mangrove site exhibited highly diverse bacterial communities with no dominating members, and Symbiodiniaceae communities dominated by Durusdinium. All corals survived for 9 months after being transplanted from reef-to-mangrove, mangrove-to-reef environments (as well as control within environment transplants), and during this time there were significant changes in the bacterial communities, but not in the Symbiodiniaceae communities or their photo-physiological functioning. In reef-to-mangrove transplanted corals, there were varied, but sometimes rapid shifts in the associated bacterial communities, including a loss of “core” bacterial members after 9 months where coral bacterial communities began to resemble those of the native mangrove corals. Bacterial communities associated with mangrove-to-reef P. acuta colonies also changed from their original composition, but remained different to the native reef corals. Our data demonstrates that P. acuta associated bacterial communities are strongly influenced by changes in environmental conditions, whereas Symbiodiniaceae associated communities remain highly stable.

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http://hdl.handle.net/10453/151519