Microbial activity in the marine deep biosphere : progress and prospects
Orcutt, Beth N.
LaRowe, Douglas E.
Biddle, Jennifer F.
Colwell, Frederick S.
Glazer, Brian T.
Kiel Reese, Brandi
Kirkpatrick, John B.
Lapham, Laura L.
Mills, Heath J.
Sylvan, Jason B.
Wankel, Scott D.
Wheat, C. Geoffrey
MetadataShow full item record
KeywordDeep biosphere; IODP; Biogeochemistry; Sediment; Oceanic crust; C-DEBI; Subsurface microbiology
The vast marine deep biosphere consists of microbial habitats within sediment, pore waters, upper basaltic crust and the fluids that circulate throughout it. A wide range of temperature, pressure, pH, and electron donor and acceptor conditions exists—all of which can combine to affect carbon and nutrient cycling and result in gradients on spatial scales ranging from millimeters to kilometers. Diverse and mostly uncharacterized microorganisms live in these habitats, and potentially play a role in mediating global scale biogeochemical processes. Quantifying the rates at which microbial activity in the subsurface occurs is a challenging endeavor, yet developing an understanding of these rates is essential to determine the impact of subsurface life on Earth's global biogeochemical cycles, and for understanding how microorganisms in these “extreme” environments survive (or even thrive). Here, we synthesize recent advances and discoveries pertaining to microbial activity in the marine deep subsurface, and we highlight topics about which there is still little understanding and suggest potential paths forward to address them. This publication is the result of a workshop held in August 2012 by the NSF-funded Center for Dark Energy Biosphere Investigations (C-DEBI) “theme team” on microbial activity (www.darkenergybiosphere.org).
© The Author(s), 2013. This article is distributed under the terms of the Creative Commons Attribution License. The definitive version was published in Frontiers in Microbiology 4 (2013): 189, doi:10.3389/fmicb.2013.00189.
The following license files are associated with this item:
Showing items related by title, author, creator and subject.
Contribution of ocean, fossil fuel, land biosphere, and biomass burning carbon fluxes to seasonal and interannual variability in atmospheric CO2 Nevison, Cynthia D.; Mahowald, Natalie M.; Doney, Scott C.; Lima, Ivan D.; van der Werf, Guido R.; Randerson, James T.; Baker, David F.; Kasibhatla, Prasad S.; McKinley, Galen A. (American Geophysical Union, 2008-02-12)Seasonal and interannual variability in atmospheric carbon dioxide (CO2) concentrations was simulated using fluxes from fossil fuel, ocean and terrestrial biogeochemical models, and a tracer transport model with time-varying ...
Salt marsh sediment diversity : a test of the variability of the rare biosphere among environmental replicates Bowen, Jennifer L.; Morrison, Hilary G.; Hobbie, John E.; Sogin, Mitchell L. (2011-12-17)Much of the phylogenetic diversity in microbial systems arises from rare taxa that comprise the long tail of taxon rank distribution curves. This vast diversity presents a challenge to testing hypotheses about the effects ...
Mapping the biosphere : exploring species to understand the origin, organization and sustainability of biodiversity Wheeler, Q. D.; Knapp, Sandra; Stevenson, D. W.; Stevenson, J.; Blum, Stan D.; Boom, B.. M.; Borisy, Gary G.; Buizer, J. L.; De Carvalho, M. R.; Cibrian, A.; Donoghue, M. J.; Doyle, V.; Gerson, E. M.; Graham, C. H.; Graves, P.; Graves, Sara J.; Guralnick, Robert P.; Hamilton, A. L.; Hanken, J.; Law, W.; Lipscomb, D. L.; Lovejoy, T. E.; Miller, Holly; Miller, J. S.; Naeem, Shahid; Novacek, M. J.; Page, L. M.; Platnick, N. I.; Porter-Morgan, H.; Raven, Peter H.; Solis, M. A.; Valdecasas, A. G.; Van Der Leeuw, S.; Vasco, A.; Vermeulen, N.; Vogel, J.; Walls, R. L.; Wilson, E. O.; Woolley, J. B. (Taylor & Francis, 2012-03-27)The time is ripe for a comprehensive mission to explore and document Earth's species. This calls for a campaign to educate and inspire the next generation of professional and citizen species explorers, investments in ...