γ蛋白杆菌
变形菌纲
α蛋白细菌
生物地球化学循环
生物
磁黄铁矿
环境化学
微生物垫
黄铁矿
化斜
硫化物
水柱
生态学
地球化学
地质学
细菌
化学
16S核糖体RNA
古生物学
蓝藻
有机化学
作者
Roman A. Barco,Colleen Hoffman,Gustavo A. Ramírez,Brandy M. Toner,Katrina J. Edwards,Jason B. Sylvan
标识
DOI:10.1111/1462-2920.13666
摘要
Sulfide mineral precipitation occurs at mid-ocean ridge (MOR) spreading centers, both in the form of plume particles and seafloor massive sulfide structures. A common constituent of MOR is the iron-bearing sulfide mineral pyrrhotite, which was chosen as a substrate for in-situ incubation studies in shallow waters of Catalina Island, CA to investigate the colonization of iron-oxidizing bacteria. Microbial community datasets were obtained from in-situ incubated pyrrhotite, allowing for direct comparison to microbial communities of iron-sulfides from active and inactive chimneys in deep-sea environments. Unclassified Gammaproteobacteria and Alphaproteobacteria (Magnetovibrio) largely dominated the bacterial community on pyrrhotite samples incubated in the water column while samples incubated at the surface sediment showed more even dominance by Deltaproteobacteria (Desulfobulbus), Gammaproteobacteria (Piscirickettsiaceae), Alphaproteobacteria (Rhodobacteraceae), and Bacteroidetes (Flavobacteriia). Cultivations that originated from pyrrhotite samples resulted in the enrichment of both, sheath-forming and stalk-forming Zetaproteobacteria. Additionally, a putative novel species of Thiomicrospira was isolated and shown to grow autotrophically with iron, indicating a new biogeochemical role for this ubiquitous microorganism.
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