期刊
SCIENCE
卷 324, 期 5925, 页码 397-400出版社
AMER ASSOC ADVANCEMENT SCIENCE
DOI: 10.1126/science.1167350
关键词
-
资金
- NSF Polar postdoctoral fellowship [OPP-0528710]
- NSF [EAR-0311937, OPP-432595, OPP-0631494, OPP-0338097, OCE-0728683]
- Canadian Institute for Advanced Research
- Harvard Microbial Sciences Initiative
- NASA [NNX07AV51G]
An active microbial assemblage cycles sulfur in a sulfate-rich, ancient marine brine beneath Taylor Glacier, an outlet glacier of the East Antarctic Ice Sheet, with Fe(III) serving as the terminal electron acceptor. Isotopic measurements of sulfate, water, carbonate, and ferrous iron and functional gene analyses of adenosine 5'-phosphosulfate reductase imply that a microbial consortium facilitates a catalytic sulfur cycle. These metabolic pathways result from a limited organic carbon supply because of the absence of contemporary photosynthesis, yielding a subglacial ferrous brine that is anoxic but not sulfidic. Coupled biogeochemical processes below the glacier enable subglacial microbes to grow in extended isolation, demonstrating how analogous organic-starved systems, such as Neoproterozoic oceans, accumulated Fe(II) despite the presence of an active sulfur cycle.
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