Publikation: Higher genotypic diversity and distinct assembly mechanism of free-living Symbiodiniaceae assemblages than sympatric coral-endosymbiotic assemblages in a tropical coral reef
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While in hospite Symbiodiniaceae dinoflagellates are essential for coral health, ambient free-living counterparts are crucial for coral recruitment and resilience. Comparing free-living and in hospite Symbiodiniaceae communities can potentially provide insights into endosymbiont acquisition and recurrent recruitment in bleaching recovery. In this study, we studied coral-endosymbiotic and ambient free-living Symbiodiniaceae communities in the South China Sea. We collected samples from 183 coral and ambient plankton samples and conducted metabarcoding to investigate the diversity distribution, driving factors, and assembly mechanisms of the two groups of Symbiodiniaceae. Results revealed Cladocopium C1 and Durusdinium D1 as dominant genotypes. We detected a higher genotypic diversity in free-living than in hospite symbiodiniacean communities, but with shared dominant genotypes. This indicates a genetically diverse pool of Symbiodiniaceae available for recruitment by corals. Strikingly, we found that the cooler area had more Symbiodiniaceae thermosensitive genotypes, whereas the warmer area had more Symbiodiniaceae thermotolerant genotypes. Furthermore, in hospite and free-living Symbiodiniaceae communities were similarly affected by environmental factors, but shaped by different assembly mechanisms. The in hospite communities were controlled mainly by deterministic processes, whereas the ambient communities by stochastic processes. This study sheds light on the genetic diversity of source environmental Symbiodiniaceae and differential assembly mechanisms influencing Symbiodiniaceae inside and outside corals.
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LIN, Sitong, Ling LI, Zhi ZHOU, Huatao YUAN, Osama S. SAAD, Jia TANG, Wenqi CAI, Kefu YU, Senjie LIN, 2024. Higher genotypic diversity and distinct assembly mechanism of free-living Symbiodiniaceae assemblages than sympatric coral-endosymbiotic assemblages in a tropical coral reef. In: Microbiology Spectrum. American Society for Microbiology (ASM). 2024, 12(8), 00514-24. eISSN 2165-0497. Verfügbar unter: doi: 10.1128/spectrum.00514-24BibTex
@article{Lin2024-08-06Highe-70320, year={2024}, doi={10.1128/spectrum.00514-24}, title={Higher genotypic diversity and distinct assembly mechanism of free-living Symbiodiniaceae assemblages than sympatric coral-endosymbiotic assemblages in a tropical coral reef}, number={8}, volume={12}, journal={Microbiology Spectrum}, author={Lin, Sitong and Li, Ling and Zhou, Zhi and Yuan, Huatao and Saad, Osama S. and Tang, Jia and Cai, Wenqi and Yu, Kefu and Lin, Senjie}, note={Article Number: 00514-24} }
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