Department of Microbiology, University of Georgia, Athens, Georgia 30602.
Appl Environ Microbiol. 1988 May;54(5):1151-7. doi: 10.1128/aem.54.5.1151-1157.1988.
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 H(2) or acetate. The second group was composed of two subgroups which were able to utilize H(2) 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 H(2) and formate. The second subgroup included Methanococcus maripaludis, which utilized only H(2) and formate. Other groups of methanogens were also present, including Methanosarcina sp. which utilized acetate, H(2), 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.
在乔治亚盐沼的沉积物中，产甲烷菌约占总细菌的 0.5%，其中互花米草是主要植被。产甲烷菌的种群由至少两组大小相近的菌群组成。一组由能够利用三甲胺但不能利用 H₂或乙酸盐的球菌组成。第二组由两个亚组组成，这两个亚组能够利用 H₂但不能利用三甲胺或乙酸盐。更常见的亚组包括除了 H₂和甲酸盐之外还能够利用异丙醇的杆状或板状产甲烷菌。第二亚组包括仅利用 H₂和甲酸盐的 Methanococcus maripaludis。其他产甲烷菌群体也存在，包括利用乙酸盐、H₂和甲基胺的 Methanosarcina sp.。除了产甲烷菌类型的整体可变性外，沉积物中产甲烷菌的数量在高和矮互花米草区之间以及区内都表现出显著的空间可变性。
