期刊
ISME JOURNAL
卷 15, 期 3, 页码 818-832出版社
SPRINGERNATURE
DOI: 10.1038/s41396-020-00816-7
关键词
-
资金
- Census of Deep Life of the Deep Carbon Observatory - Alfred P. Sloan Foundation
- French National Agency For Research (ANR) through the deepOASES project [ANR-14-CE01-0008-01]
- Mission pour les Initiatives Transverses et Interdisciplinaires of the French CNRS (Defi Origines 2018)
- LABEX UnivEarthS
- IPGP multidisciplinary program PARI
- Region Ile-de-France SESAME grant [12015908]
The Lost City is a unique oceanic hydrothermal field colonized by a single phylotype of archaeal Methanosarcinales and sulfur- and methane-metabolizing bacteria. The microbial ecology of the 'Lost City'-type Old City hydrothermal field along the southwest Indian ridge was recently discovered and characterized. Differences in dominant taxa and metabolisms between chimneys were found, with potential formate- and CO-metabolizing microorganisms and sulfur-metabolizing bacteria being abundant.
Lost City (mid-Atlantic ridge) is a unique oceanic hydrothermal field where carbonate-brucite chimneys are colonized by a single phylotype of archaeal Methanosarcinales, as well as sulfur- and methane-metabolizing bacteria. So far, only one submarine analog of Lost City has been characterized, the Prony Bay hydrothermal field (New Caledonia), which nonetheless shows more microbiological similarities with ecosystems associated with continental ophiolites. This study presents the microbial ecology of the 'Lost City'-type Old City hydrothermal field, recently discovered along the southwest Indian ridge. Five carbonate-brucite chimneys were sampled and subjected to mineralogical and geochemical analyses, microimaging, as well as 16S rRNA-encoding gene and metagenomic sequencing. Dominant taxa and metabolisms vary between chimneys, in conjunction with the predicted redox state, while potential formate- and CO-metabolizing microorganisms as well as sulfur-metabolizing bacteria are always abundant. We hypothesize that the variable environmental conditions resulting from the slow and diffuse hydrothermal fluid discharge that currently characterizes Old City could lead to different microbial populations between chimneys that utilize CO and formate differently as carbon or electron sources. Old City discovery and this first description of its microbial ecology opens up attractive perspectives for understanding environmental factors shaping communities and metabolisms in oceanic serpentinite-hosted ecosystems.
作者
我是这篇论文的作者
点击您的名字以认领此论文并将其添加到您的个人资料中。
推荐
暂无数据