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The Deep Biosphere in Igneous Oceanic Crust

Presenter: Katrina Edwards, University of Southern California
When: April 6, 2012 9AM PDT

Over the past two decades, there has been an increasing awareness within the geological, microbiological, and oceanographic communities of the potentially vast microbial biosphere that is harbored beneath the surface of the Earth. With this awareness has come a mounting effort to study this potential biome — to better quantify biomass abundance, activity, and biogeochemical consequences of this activity. In the Earth system, the largest deep subsurface biome is also the least accessible — the deep igneous ocean subsurface biosphere. This subcrustal biosphere also has greatest potential for influencing global scale biogeochemical processes ?the carbon and energy cycles for example, and other elemental cycles.

This talk will focus on recent studies designed to elucidate this subcrustal biosphere, and illustrate techniques and novel technologies employed to address them. Integrative approaches using molecular biological, in-situ experimental, mineralogical, and geochemical techniques will be illustrated.

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