Characterizing patterns in the microbial communities associated with canopy‐forming kelps is critical to understanding the mechanisms shaping macroalgal microbiomes. Using 16S rRNA gene sequencing, we characterized bacterial and archaeal communities associated with giant kelp in the Santa Barbara Channel. Our results indicate that kelp‐associated microbial communities are altered in the presence of epiphytic bryozoans and reflect changes previously observed in other studies of stressed macroalgae. This observation is indicative of patterns of microbiome disruption (dysbiosis) and opportunistic pathogenesis that may have implications for the health and productivity of foundational species of macroalgae. Our study highlights new patterns in host–microbiome associations and reveals the importance of considering host source and condition when investigating the dynamics of macroalgal microbiomes.

中文翻译：

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附生植物的存在改变了巨型海带微生物组

表征与冠层形成的海藻相关的微生物群落的模式对于了解形成大型藻类微生物群的机制至关重要。使用16S rRNA基因测序，我们表征了与圣芭芭拉海峡中的巨型海藻相关的细菌和古细菌群落。我们的结果表明，在附生的苔藓动物的存在下，海带相关的微生物群落发生了变化，反映了以前在其他大型藻类研究中观察到的变化。该观察结果表明微生物组破坏（dysbiosis）和机会性发病机制的模式可能对大型藻类基础物种的健康和生产力产生影响。