Bacterial biomass and activity profiles within deep sediment layers

Cragg, Barry Andrew, Parkes, Ronald John, Fry, John Christopher, Herbert, R. A., Wimpenny, Julian W. T. and Getliff, J. M. 1990. Bacterial biomass and activity profiles within deep sediment layers. Proceedings of the Ocean Drilling Program Scientific Results 112 , pp. 607-619. 10.2973/odp.proc.sr.112.161.1990

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Abstract

Microbiological examination of sediment cores from the Peru margin (Leg 112) has produced highly significant results: (1) bacteria were present at all sediment depths sampled to 80 meters below seafloor (mbsf); (2) Bacteria were observed in the process of cell division at all but one depth to 80 mbsf; (3) Viable bacteria of different types (heterotrophs, sulfate-reducing, nitrate-reducing, methanogenic, and hydrocarbon oxidizing) have been isolated from many of the sediment samples, including those at 80 mbsf; and (4) Potential activity rates for sulfate reduction and methanogenesis have been determined and are consistent with the distribution of the respective bacteria and in-situ chemical profiles within the sediment. In combination, these results unequivocally demonstrate the presence and activity of bacteria within deep sediment layers.

Item Type:	Article
Date Type:	Publication
Status:	Published
Schools:	Biosciences Earth and Environmental Sciences
Subjects:	Q Science > QE Geology Q Science > QR Microbiology
Uncontrolled Keywords:	Deep Sediment Bacteria
Publisher:	Ocean Drilling Program
ISSN:	1096-7451
Last Modified:	12 Jun 2019 02:19
URI:	https://orca.cardiff.ac.uk/id/eprint/8692

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