Niche specialization of reef-building corals in the mesophotic zone: Metabolic trade-offs between divergent Symbiodinium types

Cooper, TF; Ulstrup, KE; Dandan, SS; Heyward, AJ; Kühl, M; Muirhead, A; O'Leary, RA; Ziersen, BEF; van Oppen, MJH

Niche specialization of reef-building corals in the mesophotic zone: Metabolic trade-offs between divergent Symbiodinium types

Cooper, TF Ulstrup, KE Dandan, SS Heyward, AJ Kühl, M

Muirhead, A O'Leary, RA Ziersen, BEF van Oppen, MJH

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Publication Type:: Journal Article
Citation:: Proceedings of the Royal Society B: Biological Sciences, 2011, 278 (1713), pp. 1840 - 1850
Issue Date:: 2011-06-01

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Field	Value	Language
dc.contributor.author	Cooper, TF	en_US
dc.contributor.author	Ulstrup, KE	en_US
dc.contributor.author	Dandan, SS	en_US
dc.contributor.author	Heyward, AJ	en_US
dc.contributor.author	Kühl, M https://orcid.org/0000-0002-1792-4790	en_US
dc.contributor.author	Muirhead, A	en_US
dc.contributor.author	O'Leary, RA	en_US
dc.contributor.author	Ziersen, BEF	en_US
dc.contributor.author	van Oppen, MJH	en_US
dc.date.issued	2011-06-01	en_US
dc.identifier.citation	Proceedings of the Royal Society B: Biological Sciences, 2011, 278 (1713), pp. 1840 - 1850	en_US
dc.identifier.issn	0962-8452	en_US
dc.identifier.uri	http://hdl.handle.net/10453/18076
dc.description.abstract	The photobiology of two reef corals and the distribution of associated symbiont types were investigated over a depth gradient of 0-60 m at Scott Reef, Western Australia. Pachyseris speciosa hosted mainly the same Symbiodinium C type similar to C3 irrespective of sampling depth. By contrast, Seriatopora hystrix hosted predominantly Symbiodinium type D1a or D1a-like at shallow depths while those in deeper water were dominated by a Symbiodinium C type closely related to C1. The photosynthesis/respiration (P/R) ratio increased consistently with depth at the two sampling times (November 2008 and April 2009) for P. speciosa and in November 2008 only for S. hystrix, suggesting a reduction in metabolic energy expended for every unit of energy obtained from photosynthesis. However, in April 2009, shallow colonies of S. hystrix exhibited decreased P/R ratios down to depths of approximately 23 m, below which the ratio increased towards the maximum depth sampled. This pattern was mirrored by changes in tissue biomass determined as total protein content. The depth of change in the direction of the P/R ratio correlated with a shift from Symbiodinium D to C-dominated colonies. We conclude that while photobiological flexibility is vital for persistence in contrasting light regimes, a shift in Symbiodinium type may also confer a functional advantage albeit at a metabolic cost with increased depth. © 2010 The Royal Society.	en_US
dc.relation.ispartof	Proceedings of the Royal Society B: Biological Sciences	en_US
dc.relation.isbasedon	10.1098/rspb.2010.2321	en_US
dc.subject.mesh	Animals	en_US
dc.subject.mesh	Anthozoa	en_US
dc.subject.mesh	Dinoflagellida	en_US
dc.subject.mesh	Cloning, Molecular	en_US
dc.subject.mesh	Sequence Analysis, DNA	en_US
dc.subject.mesh	Ecosystem	en_US
dc.subject.mesh	Biodiversity	en_US
dc.subject.mesh	Symbiosis	en_US
dc.subject.mesh	Species Specificity	en_US
dc.subject.mesh	Photosynthesis	en_US
dc.subject.mesh	Molecular Sequence Data	en_US
dc.subject.mesh	Western Australia	en_US
dc.subject.mesh	Coral Reefs	en_US
dc.title	Niche specialization of reef-building corals in the mesophotic zone: Metabolic trade-offs between divergent Symbiodinium types	en_US
dc.type	Journal Article
utslib.citation.volume	1713	en_US
utslib.citation.volume	278	en_US
utslib.for	0602 Ecology	en_US
utslib.for	06 Biological Sciences	en_US
utslib.for	07 Agricultural and Veterinary Sciences	en_US
utslib.for	11 Medical and Health Sciences	en_US
pubs.embargo.period	Not known	en_US
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
pubs.issue	1713	en_US
pubs.publication-status	Published	en_US
pubs.volume	278	en_US

Abstract:

The photobiology of two reef corals and the distribution of associated symbiont types were investigated over a depth gradient of 0-60 m at Scott Reef, Western Australia. Pachyseris speciosa hosted mainly the same Symbiodinium C type similar to C3 irrespective of sampling depth. By contrast, Seriatopora hystrix hosted predominantly Symbiodinium type D1a or D1a-like at shallow depths while those in deeper water were dominated by a Symbiodinium C type closely related to C1. The photosynthesis/respiration (P/R) ratio increased consistently with depth at the two sampling times (November 2008 and April 2009) for P. speciosa and in November 2008 only for S. hystrix, suggesting a reduction in metabolic energy expended for every unit of energy obtained from photosynthesis. However, in April 2009, shallow colonies of S. hystrix exhibited decreased P/R ratios down to depths of approximately 23 m, below which the ratio increased towards the maximum depth sampled. This pattern was mirrored by changes in tissue biomass determined as total protein content. The depth of change in the direction of the P/R ratio correlated with a shift from Symbiodinium D to C-dominated colonies. We conclude that while photobiological flexibility is vital for persistence in contrasting light regimes, a shift in Symbiodinium type may also confer a functional advantage albeit at a metabolic cost with increased depth. © 2010 The Royal Society.

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http://hdl.handle.net/10453/18076