Unique genes carried by abundant species enhance CH_(4) emissions during the growing season at the Tibetan Plateau  

作　　者：Yue Liang Liyuan He Jieying Wang Yanfang Liu Wenying Wang Chengjie Ren Jun Wang Yaoxin Guo Ninglian Wang Fazhu Zhao 

机构地区：[1]Shaanxi Key Laboratory of Earth Surface System and Environmental Carrying Capacity,Northwest University,Xi’an,710127,China [2]College of Urban and Environmental Sciences,Northwest University,Xi’an,710127,China [3]Department of Biology,San Diego State University,San Diego,CA,92182,USA [4]Key Laboratory of Biodiversity Formation Mechanism and Comprehensive Utilization in Qinghai-Tibet Plateau,School of Life Sciences,Qinghai Normal University,Xining,810008,China [5]College of Agronomy,Northwest A&F University,Yangling,712100,China [6]The College of Life Sciences,Northwest University,Xi’an,710072,China [7]Carbon Neutrality College (Yulin),Northwest University,Xi’an,710127,China

出　　处：《Soil Ecology Letters》2024年第2期83-95,共13页土壤生态学快报（英文）

基　　金：financially supported by the National Natural Science Foundation of China(Grant No.42277284);the 2021 first funds for central government to guide local science and technology development in Qinghai Province(Grant No.2021ZY002);the Second Tibetan Plateau Scientific Expedition and Research Program(Grant Nos.2019QZKK020102,2019OZKK0302).

摘　　要：CH_(4) emission rates followed an increased pattern during the growing season at Tibetan Plateau.•Unique genes carried by abundant species were positively correlated with CH_(4) emission rates.•Climate factors influenced CH_(4) emission rates by regulating microbial community and their genes.Microorganisms play pivotal roles in soil methane(CH_(4))emissions and their functional genes are origins of a key mechanism for soil CH4-cycling.However,understanding of the roles of specific genes(e.g.,unique or shared genes carried by species)underlying CH_(4)-cycling remains elusive.Here,we measured CH_(4) emission rates and investigated variations in microbial community and the abundance of genes carried by species during the growing season in alpine meadow on the Tibetan Plateau.We discovered that CH_(4) emission rates increased from 394.4,745.9,and 1092.7µg CH4 m−2 h−1,in April,June,and August,respectively,and had a positive correlation with unique genes carried by abundant species during the growing season.Moreover,we found that unique genes carried by abundant species involved in methanogenesis processes have a higher abundance than methanotrophic processes.Further analysis indicated that climate factors(i.e.,mean monthly temperature(MMT)and mean monthly precipitation(MMP))influenced microbial community and their functional genes,and therefore affected the CH_(4) emission rates.Overall,the present study provides a novel insight into the variation of soil CH4 emissions from a functional gene perspective,highlighting the important roles of unique genes carried by abundant species in CH4 emissions in the Tibetan Plateau under seasonal variation.

关 键 词：soil CH_(4) emissions unique genes abundant species CH_(4)-cycling growing season 

分 类 号：S153.6[农业科学—土壤学]