Exploration of Life in Deep Subseafloor Sediments
نویسندگان
چکیده
منابع مشابه
Microbial life in deep subseafloor coal beds.
Deep beneath the seafloor, microbial communities thrive on the leftovers of organic material that in the past settled down from the surface layers of the ocean to the sediment. As the organic matter was buried deeper and deeper over geological time it became increasingly recalcitrant to microbial degradation. Microbial cells that still persist in these ancient deposits appear to survive at the ...
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T hroughout the world’s oceans, the sediments that cover the seafloor, and the cracks and fissures of the basaltic ocean crust, are permeated by microbial life (1, 2). As these bacteria and archaea are mostly not available in laboratory culture and thus elude direct physiological characterization, Jørgensen et al. correlate geochemical regimes in subseafloor sediments with in situ abundance of ...
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On a global scale, crustal fluids fuel a large part of the deep-subseafloor biosphere by providing electron acceptors for microbial respiration. In this study, we examined bacterial cultures from sediments of the Juan de Fuca Ridge, Northeast Pacific (IODP Site U1301). The sediments comprise three distinctive compartments: an upper sulfate-containing zone, formed by bottom-seawater diffusion, a...
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insurers have in the past few decades faced longevity risks - the risk that annuitants survive more than expected - and therefore need a new approach to manage this new risk. in this dissertation we survey methods that hedge longevity risks. these methods use securitization to manage risk, so using modern financial and insurance pricing models, especially wang transform and actuarial concepts, ...
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ژورنال
عنوان ژورنال: Oceanography
سال: 2006
ISSN: 1042-8275
DOI: 10.5670/oceanog.2006.05