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Populations of Methanogenic Bacteria in a Georgia Salt Marsh

By Michael J. Franklin, William J. Wiebe and William B. Whitman

Abstract

Methanogens represented about 0.5% of the total bacteria in sediments from a Georgia salt marsh in which Spartina alterniflora is the predominant vegetation. The population of methanogens was composed of at least two groups of nearly equal size. One group was represented by cocci which were able to utilize trimethylamine and were unable to use H2 or acetate. The second group was composed of two subgroups which were able to utilize H2 but were unable to use trimethylamine or acetate. The more common subgroup included rod- or plate-shaped methanogens which could utilize isopropanol in addition to H2 and formate. The second subgroup included Methanococcus maripaludis, which utilized only H2 and formate. Other groups of methanogens were also present, including Methanosarcina sp. which utilized acetate, H2, and methylamines. In addition to the overall variability in the types of methanogens, the numbers of methanogens in sediments also exhibited significant spatial variability both within and between tall- and short-Spartina zones

Topics: General Microbial Ecology
Year: 1988
OAI identifier: oai:pubmedcentral.nih.gov:202619
Provided by: PubMed Central
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