Microbe Mineral Interactions Laboratory, Department of Geosciences, University of Rhode Island Kingston, RI, USA.
Ecosystem Dynamics in Geochemical Environments Lab, Department of Earth and Environmental Science, University of Illinois at Chicago Chicago, IL, USA.
Front Microbiol. 2015 Feb 10;6:10. doi: 10.3389/fmicb.2015.00010. eCollection 2015.
A field campaign targeting high pH, H2-, and CH4-emitting serpentinite-associated springs in the Zambales and Palawan Ophiolites of the Philippines was conducted in 2012-2013, and enabled description of several springs sourced in altered pillow basalts, gabbros, and peridotites. We combine field observations of pH, temperature, conductivity, dissolved oxygen, and oxidation-reduction potential with analyses of major ions, dissolved inorganic carbon, dissolved organic carbon, and dissolved gas phases in order to model the activities of selected phases important to microbial metabolism, and to rank feasible metabolic reactions based on energy yield. We document changing geochemical inventories in these springs between sampling years, and examine how the environment supports or prevents the function of certain microbial metabolisms. In all, this geochemistry-based assessment of feasible metabolisms indicates methane cycling, hydrogen oxidation, some iron and sulfur metabolisms, and ammonia oxidation are feasible reactions in this continental site of serpentinization.
2012-2013 年，在菲律宾的 Zambales 和 Palawan 蛇绿岩中，针对高 pH 值、H2 和 CH4 排放的蛇纹石化相关泉进行了实地考察，从而能够描述几种源自变质枕状玄武岩、辉长岩和橄榄岩的泉。我们将 pH 值、温度、电导率、溶解氧和氧化还原电位的现场观测与主要离子、溶解无机碳、溶解有机碳和溶解气相的分析相结合，以便对微生物代谢中重要的选定相的活性进行建模，并根据能量产量对可行的代谢反应进行排序。我们记录了这些泉在采样年份之间的地球化学物质变化情况，并研究了环境如何支持或阻止某些微生物代谢的功能。总的来说，这种基于地球化学的可行代谢物评估表明，在这个蛇纹石化的大陆地点，甲烷循环、氢气氧化、一些铁和硫代谢以及氨氧化是可行的反应。
