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doi:10.2204/iodp.proc.320321.214.2013

Data report: microbial abundance in subseafloor sediments of the equatorial Pacific Ocean, Expedition 320/321¹

Jens Kallmeyer²

Abstract

Microbial cell abundances in sediment cores from Integrated Ocean Drilling Program Expedition 320/321 were quantified. Cell abundances varied between sites and with depth between >10⁶ cells/cm³ and <10³ cells/cm³. Even when using cell separation to increase sensitivity, cell abundances fall below the minimum detection limit in the deeper parts of several sites. At many of the sites, cell distribution does not follow the generally observed trend of a continuous decline with depth. Only some of these deviations appear to be correlated with lithologic changes.

¹ Kallmeyer, J., 2013. Data report: microbial abundance in subseafloor sediments of the equatorial Pacific Ocean, Expedition 320/321. In Pälike, H., Lyle, M., Nishi, H., Raffi, I., Gamage, K., Klaus, A., and the Expedition 320/321 Scientists, Proc. IODP, 320/321: Tokyo (Integrated Ocean Drilling Program Management International, Inc.).
doi:10.2204/iodp.proc.320321.214.2013

² Helmholtz Centre Potsdam, GFZ German Research Centre for Geosciences, Section 4.5, Geomicrobiology, Telegrafenberg, 14473 Potsdam, Germany. kallm@gfz-potsdam.de

Initial receipt: 2 September 2012
Acceptance: 21 January 2013
Publication: 5 April 2013
MS 320321-214

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