英国东海岸盐沼沉积物中的硫酸盐还原和产甲烷作用。
Sulfate reduction and methanogenesis in the sediment of a saltmarsh on the East coast of the United kingdom.
机构信息
Department of Biology, University of Essex, Colchester, United Kingdom.
出版信息
Appl Environ Microbiol. 1982 May;43(5):987-96. doi: 10.1128/aem.43.5.987-996.1982.
Abstract
The rates of sulfate reduction, methanogenesis, and methane loss were measured in saltmarsh sediment at monthly intervals. In addition, dissolved methane and sulfate concentrations together with pS and pH were determined. Methane formation from carbon dioxide, but not from acetate, was detected within the same horizon of sediment where sulfate reduction was most active. Sulfate reduction was about three orders of magnitude greater than annual methanogenesis. The two processes were not separated either spatially or temporally, but occurred within the same layer of sediment at the same time of the year. Their coexistence did not seem to be the result of sulfate-depleted microenvironments within which methanogenesis could occur, but the methanogenic bacteria persisted at very low rates of activity within the same environment as the sulfate reducers.
摘要
每月间隔一次测量盐沼沉积物中的硫酸盐还原、产甲烷和甲烷损失速率。此外，还测定了溶解甲烷和硫酸盐浓度以及 pS 和 pH 值。在硫酸盐还原最活跃的同一沉积物层中检测到了二氧化碳而非乙酸盐形成的甲烷。硫酸盐还原的速率比每年的产甲烷作用大约高出三个数量级。这两个过程在空间上或时间上没有分开，而是在同一年的同一层沉积物中同时发生。它们的共存似乎不是由于硫酸盐耗尽的微环境中可以发生产甲烷作用的结果，而是产甲烷菌在与硫酸盐还原菌相同的环境中以非常低的活性速率持续存在。
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