Abstract
Background
To explore the possibility that endosymbiotic dinoflagellates (Symbiodiniaceae) are associated with coral calcification rates, we investigated the diversity of symbiotic algae in coral colonies with different calcification rates within massive and branching corals (Porites australiensis and Acropora digitifera).
Methods and results
Genotyping symbiotic algae from colonies with different calcification rates revealed that all the colonies of both species harbored mainly Cladocopium (previously clade C of Symbiodinium). The Cladocopium symbionts in P. australiensis were mainly composed of C15 and C15bn, and those in A. digitifera of C50a and C50c. We did not detect clear relationships between symbiont compositions and calcification rates within the two coral species.
Conclusions
Our results suggest that different coral calcification rates within species may be attributed to genetic factors of coral hosts themselves and/or within symbiont genotypes.
References
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Acknowledgements
We thank Dr. Masaru Mizuyama for his advice on analysis.
Funding
This study was supported by the Nissei Science Foundation (No. 02, FY2017), KAKENHI Grants-in-Aid (Grant Nos. 18H03366, 18K18793, 19K22938, 20H00653) from the Japan Society for the Promotion of Science, and the Research Laboratory on Environmentally-conscious Developments and Technologies (E-code) at the National Institute of Advanced Industrial Science and Technology (AIST).
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Coral samples were collected under the permission from Okinawa Prefecture (No. 23–25).
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Gibu, K., Ikeuchi, E., Bell, T. et al. Calcification rates of a massive and a branching coral species were unrelated to diversity of endosymbiotic dinoflagellates. Mol Biol Rep 49, 9101–9106 (2022). https://doi.org/10.1007/s11033-022-07702-9
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DOI: https://doi.org/10.1007/s11033-022-07702-9