Scleractinian corals' microbial symbionts influence host health, yet how coral microbiomes assembled over evolution is not well understood. We survey bacterial and archaeal communities in phylogenetically diverse Australian corals representing more than 425 million years of diversification. We show that coral microbiomes are anatomically compartmentalized in both modern microbial ecology and evolutionary assembly. Coral mucus, tissue, and skeleton microbiomes differ in microbial community composition, richness, and response to host vs. environmental drivers. We also find evidence of coral-microbe phylosymbiosis, in which coral microbiome composition and richness reflect coral phylogeny. Surprisingly, the coral skeleton represents the most biodiverse coral microbiome, and also shows the strongest evidence of phylosymbiosis. Interactions between bacterial and coral phylogeny significantly influence the abundance of four groups of bacteria-including Endozoicomonas-like bacteria, which divide into host-generalist and host-specific subclades. Together these results trace microbial symbiosis across anatomy during the evolution of a basal animal lineage.

中文翻译：

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珊瑚相关细菌表现出共生共生。

Scleractinian珊瑚的微生物共生体影响宿主的健康，但是人们对珊瑚微生物群在进化过程中的聚集方式还知之甚少。我们调查了系统发育多样的澳大利亚珊瑚中的细菌和古细菌群落，这些珊瑚代表了超过4.25亿年的多样性。我们显示，珊瑚微生物群在现代微生物生态学和进化装配中都在解剖上是分隔的。珊瑚的粘液，组织和骨骼微生物群在微生物群落组成，丰富度以及对宿主与环境驱动因子的反应方面有所不同。我们还发现了珊瑚微生物共生的证据，其中珊瑚微生物组的组成和丰富度反映了珊瑚的系统发育。令人惊讶的是，珊瑚骨骼代表了生物多样性最强的珊瑚微生物组，并且也显示出最强的系统共生证据。细菌和珊瑚系统发育之间的相互作用显着影响四类细菌的丰度，包括类内生细菌，分为寄主属和寄主特异子。在基础动物谱系的进化过程中，这些结果共同追踪了整个解剖结构中的微生物共生。