Temporal and spatial impact of Spartina alterniflora invasion on methanogens community in Chongming Island, China.

摘要: Methane production by methanogens in wetland is recognized as a significant contributor to global warming. Spartina alterniflora (S. alterniflora), which an invasion plant China's wetland, was reported have enormous effects on methane production. But studies shifts the methanogen community response S. at temporal and spatial scales initial years are rare. Sediments derived from invasive species native Phragmites australis (P. australis) pairwise sites chronosequence patch (4 years) were analyzed investigate abundance structure of using quantitative real-time PCR (qPCR) Denaturing gradient gel electrophoresis (DGGE) cloning methyl-coenzyme M reductase A (mcrA) gene. For sites, soils lower than that P. soils. patch, diversity highest soil subjected two invasion, we detected some rare groups including Methanocellales Methanococcales. These results indicated priming effect stages for microorganisms soil, also supported diverse root exudates. The communities after due changes pH, salinity sulfate. indicate exudates predominate methylotrophic (Methanosarcinales) may adapt availability substrates reflects potential high alterniflora.