Disparate population and holobiont structure of pocilloporid corals across the Red Sea gradient demonstrate species-specific evolutionary trajectories
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ArticleAuthors
Buitrago-López, Carol
Cardenas, Anny

Hume, Benjamin

Gosselin, Thierry
Staubach, Fabian
Aranda, Manuel

Barshis, Daniel J.

Sawall, Yvonne
Voolstra, Christian R.

KAUST Department
Marine Science ProgramRed Sea Research Center (RSRC)
Biological and Environmental Science and Engineering (BESE) Division
Date
2023-03-03Permanent link to this record
http://hdl.handle.net/10754/690063
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Global habitat degradation heightens the need to better understand patterns of genetic connectivity and diversity of marine biota across geographical ranges to guide conservation efforts. Corals across the Red Sea are subject to pronounced environmental differences, but studies so far suggest that animal populations are largely connected, excepting evidence for a genetic break between the northern-central and southern regions. Here, we investigated population structure and holobiont assemblage of two common pocilloporid corals, Pocillopora verrucosa and Stylophora pistillata, across the Red Sea. We found little evidence for population differentiation in P. verrucosa, except for the southernmost site. Conversely, S. pistillata exhibited a complex population structure with evidence for within-reef and regional genetic differentiation, in line with differences in their reproductive mode (P. verrucosa is a broadcast spawner and S. pistillata is a brooder). Analysis for genomic loci under positive selection identified 85 sites (18 of which were in coding sequences) that distinguished the southern P. verrucosa population from the remainder of the Red Sea population. By comparison, we found 128 loci (24 of which were residing in coding sequences) in S. pistillata with evidence for local adaptation at various sites. Functional annotation of the underlying proteins revealed putative roles in the response to stress, lipid metabolism, transport, cytoskeletal rearrangement, and ciliary function (among others). Microbial assemblages of both coral species showed pervasive association with microalgal symbionts from the genus Symbiodinium (former clade A) and bacteria from the genus Endozoicomonas that exhibited significant differences according to host genotype and environment. The disparity of population genetic and holobiont assemblage patterns even between closely related species (family Pocilloporidae) highlights the need for multispecies investigations to better understand the role of the environment in shaping evolutionary trajectories. It further emphasizes the importance of networks of reef reserves to achieve conservation of genetic variants critical to the future survival of coral ecosystems.Citation
Buitrago-López, C., Cárdenas, A., Hume, B. C. C., Gosselin, T., Staubach, F., Aranda, M., Barshis, D. J., Sawall, Y., & Voolstra, C. R. (2023). Disparate population and holobiont structure of pocilloporid corals across the Red Sea gradient demonstrate species-specific evolutionary trajectories. Molecular Ecology. Portico. https://doi.org/10.1111/mec.16871Sponsors
Research reported in this publication was supported by KAUST baseline research funds to CRV and the Deutsche Forschungsgemeinschaft (DFG, German Research Foundation) project number 433042944 to CRV. Open Access funding enabled and organized by Projekt DEAL. WOA Institution: UNIVERSITAET KONSTANZ.Publisher
WileyJournal
Molecular EcologyPubMed ID
36869609Additional Links
https://onlinelibrary.wiley.com/doi/10.1111/mec.16871Relations
Is Supplemented By:- [Software]
Title: reefgenomics/Red-Sea-RADSeq:. Publication Date: 2021-01-15. github: reefgenomics/Red-Sea-RADSeq Handle: 10754/692433
ae974a485f413a2113503eed53cd6c53
10.1111/mec.16871
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Except where otherwise noted, this item's license is described as Archived with thanks to Molecular Ecology under a Creative Commons license, details at: http://creativecommons.org/licenses/by-nc-nd/4.0/
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