Department of Marine Sciences, Institute of Marine Sciences and Marine Research Laboratory, The University of Connecticut, Noank, Connecticut 06340.
Appl Environ Microbiol. 1982 Feb;43(2):447-53. doi: 10.1128/aem.43.2.447-453.1982.
The distribution of methanogenic and sulfate-reducing bacteria was examined in sediments from three sites off the coast of eastern Connecticut and five sites in Long Island Sound. Both bacterial groups were detected at all sites. Three distributional patterns were observed: (i) four sites exhibited methanogenic and sulfate-reducing populations which were restricted to the upper 10 to 20 cm, with a predominance of sulfate reducers; (ii) three sites in western Long Island Sound exhibited a methanogenic population most abundant in sediments deeper than those occupied by sulfate reducers; (iii) at one site that was influenced by fresh groundwater, methanogens and sulfate reducers were numerous within the same depths; however, the number of sulfate reducers varied vertically and temporally with sulfate concentrations. It was concluded that the distributions of abundant methanogenic and sulfate-reducing bacteria were mutually exclusive. Methanogenic enrichments yielded all genera of methanogens except Methanosarcina, with the methanobacteria predominating.
对康涅狄格州东海岸外三个地点和长岛海峡五个地点的沉积物中的产甲烷菌和硫酸盐还原菌的分布进行了研究。在所有地点均检测到这两种细菌。观察到三种分布模式：（i）四个地点的产甲烷菌和硫酸盐还原菌种群仅限于上 10 至 20 厘米，硫酸盐还原菌占优势；（ii）长岛海峡西部的三个地点显示出产甲烷菌种群，其在沉积物中的丰度高于硫酸盐还原菌的丰度；（iii）在一个受淡水地下水影响的地点，产甲烷菌和硫酸盐还原菌在相同的深度内数量众多；但是，硫酸盐还原菌的数量随时间和硫酸盐浓度而垂直变化。结论是，丰富的产甲烷菌和硫酸盐还原菌的分布是相互排斥的。甲烷菌的富集产生了除 Methanosarcina 以外的所有甲烷菌属，其中甲烷杆菌占优势。
