Evolutionary radiation and microbial community dynamics shape the thermal tolerance of Fungiidae in the southern South China Sea

作者：Yuxin Wei, Biao Chen, Kefu Yu, Zhiheng Liao, Xiaopeng Yu, Zhenjun Qin, Zeming Bao, Lijia Xu, Yongzhi Wang · 发表于：Microbiology spectrum · 年份：2024 · DOI：10.1128/spectrum.02436-23 · 被引用次数：8 · 研究领域：Medicine

ABSTRACT Fungiidae have shown increased thermal adaptability in coral reef ecosystems under global warming. This study analyzes the evolutionary divergence and microbial communities of Fungiidae in the Sanjiao Reef of the southern South China Sea and explores the impact of coral evolution radiation and microbial dynamics on the heat tolerance of Fungiidae. The results found that Cycloseris was an ancient branch of Fungiidae, dating back approximately 147.8953 Mya, and Fungiidae differentiated into two ancestral clades (clades I and II) before 107.0312 Ma. Fungiidae exhibited specific symbioses with the Cladocopium C27 sub-clade. Notably, the Cladocopium C1 sub-clade has a high relative abundance in clade I, whereas the heat-tolerant Cladocopium C40 and C3u sub-clades subdominante in clade II. Regarding bacterial communities, Cycloseris costulata, the earliest divergent species, had higher bacterial β-diversity, while the latest divergent species, Lithophyllon scabra, displayed lower bacterial α-diversity and higher community stability. Beneficial bacteria dominante Fungiidae’s bacterial community (54%). The co-occurrence network revealed that microbial networks in clade II exhibited lower complexity and greater resilience than those in clade I. Our study highlights that host evolutionary radiation and microbial communities shaped Fungiidae’s thermal tolerance. The variability in subdominant Symbiodiniaceae populations may contribute to interspecific differences in thermal tol...