Mean annual precipitation modulates the assembly of high-affinity methanotroph communities and methane oxidation activity across grasslands
文献类型: 外文期刊
第一作者: Ding, Chenxiao
作者: Ding, Chenxiao;Liu, Yaowei;Zhao, Kankan;Zhang, Qichun;Luo, Yu;Di, Hongjie;Xu, Jianming;Li, Yong;Dumont, Marc G.;Pan, Hong;Li, Yuanheng;Jiao, Shuo
作者机构:
关键词: High-affinity methanotroph assembly; CH 4 oxidation; Grassland; Mean annual precipitation
期刊名称:AGRICULTURE ECOSYSTEMS & ENVIRONMENT ( 影响因子:6.6; 五年影响因子:6.7 )
ISSN: 0167-8809
年卷期: 2024 年 360 卷
页码:
收录情况: SCI
摘要: Grasslands have an important global role in biological methane (CH4) oxidation and therefore it is crucial to understand the key factors determining the assembly of high-affinity methanotroph populations and explore mechanisms that regulate CH4 oxidation activity in these ecosystems. This study explored the linkage between high-affinity methanotroph community assembly processes and CH4 oxidation potential across three grassland types in Inner Mongolia with or without livestock grazing. We found the largest proportion of deterministic selection in temperate desert grasslands, but it was increasingly structured by stochastic dispersal in temperate meadow and temperate typical grasslands. The distance decay relationship (DDR) and variation partitioning analysis (VPA) showed the strongest relationship and highest proportion of environmental factors in desert grasslands, followed by meadow and typical grasslands. Mean annual precipitation (MAP), environmental factors (moisture content, soil organic matter), and microbial traits (abundance, diversity and normalized stochasticity ratio) were significantly related with CH4 oxidation activity. Multiple statistical analyses consistently indicated the key role of MAP in shaping high-affinity methanotroph community diversity, composition, cooccurrence networks, assembly processes and CH4 oxidation activity. We found an association of increasing stochastic assembly and high-affinity methanotroph diversity with decreasing CH4 oxidation potential. This study revealed the mechanisms governing high-affinity methanotroph community assembly processes and integrates high-affinity methanotroph community assembly with CH4 oxidation activity in grassland soils.
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