DCO Project Summary

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Project Title
Coast Range Ophiolite Microbial Observatory (CROMO)
Start DateEnd Date
2012-01-01 2014-06-30
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The Coast Range Ophiolite Microbial Observatory (CROMO) sub-project of the RHC grant sought to document and track microbial populations in a series of groundwater wells in actively serpentinizing terrane in northern California. The work capitalizes upon the recovery of microbiologically validated drill cores in 2011 from the site, and from quarterly records of microbial diversity, abundance, and associated geochemistry. The substantial sampling suite and convenient laboratory facilities and infrastructure at CROMO also allows more complicated efforts to be undertaken, including transcriptomics studies, tracer studies, hydrogeological tests, etc.  The work seeks to link the occurrence, function, and consequences of microbial communities in serpentinizing environments and their linkages to both the subsurface and the surface carbon cycle.

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Reporting Year 2014 Click to expand

  • RY2014-1 - submitted on Aug 31, 2014

    Update Details:

    The investigators have sampled the wells at CROMO quarterly since 2011 and have established a substantial database to link microbial community diversity, functional diversity, and activities in a serpentinite environment. Recent efforts include stable isotope tracing of microbial carbon transformations and metatranscriptomics of serpentinite hosted microbial communities. The solid research infrastructure has also facilitated higher order research into topics such as metal redox chemistry, nutrient chemistry, and methane isotopologues. These data are being synthesized into a comprehensive publication describing microbial community dynamics in serpentinites, to be submitted in the very near future. The project has also made headway into describing microbial communities in low biomass serpentinite solids from the cores recovered in 2011, which complement studies of well waters, and provide a data set that can be extrapolated regionally. Recently we have deployed dataloggers to monitor the hydrological conditions at CROMO, which provide important contextual information for microbiological studies- such as the connections between surface and deep waters.


    Publications in preparation or submitted:

    Cardace, D., T.M. Hoehler, T. McCollom,  M. Schrenk, M.D. Kubo. Integration of 3 Consecutive Years of Aqueous Geochemistry Monitoring Serpentinization at the Coast Range Ophiolite Microbial Observatory (CROMO), Northern California, USA. Chemical Geology, In preparation.


    Crespo-Medina, M., K. Twing, M.D. Kubo, T.M. Hoehler, D. Cardace, T. McCollom, M.O. Schrenk. Microbial Metabolism of Carbon Compounds in Continental Serpentinite Fluids. Frontiers in Microbiology, submitted.
    K. I. Twing, W. J. Brazelton, M. D. Kubo, T.M. Hoehler, T. McCollom, D. Cardace, and M. O. Schrenk. Geochemically-driven microbial diversity in a subsurface serpentinite environment. In preparation.

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http://info.deepcarbon.net/individual/n9479 11121/8153-3361-8778-4979-CC
http://info.deepcarbon.net/individual/n2911 11121/3731-3787-1604-7520-CC
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