Community Structure of Lithotrophically-Driven Hydrothermal Microbial Mats from the Mariana Arc and Back-Arc.

摘要: The Mariana region exhibits a rich array of hydrothermal venting conditions in complex geological setting, which provides natural laboratory to study the influence local environmental on microbial community structure as well large-scale patterns biogeography. We used high-throughput amplicon sequencing bacterial small subunit (SSU) rRNA gene from 22 mats collected four hydrothermally active locations along Arc and back-arc explore lithotrophically-based mat communities. vent effluent was classified iron- or sulfur-rich corresponding with two distinct types, dominated by either Zetaproteobacteria Epsilonproteobacteria, respectively. Zetaproteobacterial-based communities had highest richness diversity, supports hypothesis that are ecosystem engineers creating physical habitat within chemical environment promoting enhanced diversity. In addition, we also compare sampling scale, showing bulk yields higher diversity than micro-scale sampling. Overall, present comprehensive analysis new insights into lithotrophically-driven associated high biodiversity.