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Fungi and cercozoa regulate methane-associated prokaryotes in wetland methane emissions.
Wang, Linlin; Zhao, Mingliang; Du, Xiongfeng; Feng, Kai; Gu, Songsong; Zhou, Yuqi; Yang, Xingsheng; Zhang, Zhaojing; Wang, Yingcheng; Zhang, Zheng; Zhang, Qi; Xie, Baohua; Han, Guangxuan; Deng, Ye.
Affiliation
  • Wang L; Institute of Marine Science and Technology, Shandong University, Qingdao, China.
  • Zhao M; CAS Key Laboratory of Coastal Environmental Processes and Ecological Remediation, Yantai Institute of Coastal Zone Research, Chinese Academy of Sciences, Yantai, China.
  • Du X; CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.
  • Feng K; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
  • Gu S; CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.
  • Zhou Y; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
  • Yang X; CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.
  • Zhang Z; Institute of Soil and Water Resources and Environmental Science, College of Environmental and Resource Sciences, Zhejiang University, Hangzhou, China.
  • Wang Y; Zhejiang Provincial Key Laboratory of Agricultural Resources and Environment, Zhejiang University, Hangzhou, China.
  • Zhang Z; CAS Key Laboratory for Environmental Biotechnology, Research Center for Eco-Environmental Sciences, Chinese Academy of Sciences (CAS), Beijing, China.
  • Zhang Q; College of Resources and Environment, University of Chinese Academy of Sciences, Beijing, China.
  • Xie B; Institute of Marine Science and Technology, Shandong University, Qingdao, China.
  • Han G; Collage of Agriculture and Animal Husbandry, Qinghai University, Xining, China.
  • Deng Y; Institute of Marine Science and Technology, Shandong University, Qingdao, China.
Front Microbiol ; 13: 1076610, 2022.
Article in En | MEDLINE | ID: mdl-36687630
Wetlands are natural sources of methane (CH4) emissions, providing the largest contribution to the atmospheric CH4 pool. Changes in the ecohydrological environment of coastal salt marshes, especially the surface inundation level, cause instability in the CH4 emission levels of coastal ecosystems. Although soil methane-associated microorganisms play key roles in both CH4 generation and metabolism, how other microorganisms regulate methane emission and their responses to inundation has not been investigated. Here, we studied the responses of prokaryotic, fungal and cercozoan communities following 5 years of inundation treatments in a wetland experimental site, and molecular ecological networks analysis (MENs) was constructed to characterize the interdomain relationship. The result showed that the degree of inundation significantly altered the CH4 emissions, and the abundance of the pmoA gene for methanotrophs shifted more significantly than the mcrA gene for methanogens, and they both showed significant positive correlations to methane flux. Additionally, we found inundation significantly altered the diversity of the prokaryotic and fungal communities, as well as the composition of key species in interactions within prokaryotic, fungal, and cercozoan communities. Mantel tests indicated that the structure of the three communities showed significant correlations to methane emissions (p < 0.05), suggesting that all three microbial communities directly or indirectly contributed to the methane emissions of this ecosystem. Correspondingly, the interdomain networks among microbial communities revealed that methane-associated prokaryotic and cercozoan OTUs were all keystone taxa. Methane-associated OTUs were more likely to interact in pairs and correlated negatively with the fungal and cercozoan communities. In addition, the modules significantly positively correlated with methane flux were affected by environmental stress (i.e., pH) and soil nutrients (i.e., total nitrogen, total phosphorus and organic matter), suggesting that these factors tend to positively regulate methane flux by regulating microbial relationships under inundation. Our findings demonstrated that the inundation altered microbial communities in coastal wetlands, and the fungal and cercozoan communities played vital roles in regulating methane emission through microbial interactions with the methane-associated community.
Key words

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Risk_factors_studies Language: En Journal: Front Microbiol Year: 2022 Document type: Article Affiliation country: Country of publication:

Full text: 1 Collection: 01-internacional Database: MEDLINE Type of study: Risk_factors_studies Language: En Journal: Front Microbiol Year: 2022 Document type: Article Affiliation country: Country of publication: