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However, little is known about the methanogenic communities in GFS sediments and their key environmental driving factors. This study analyzed stream sediments from the Rongbuk River basin on Mt. Everest for methanogenic communities and their temperature responses through anaerobic microcosm incubations at 5\u00b0C and 15\u00b0C. Diverse methanogens were identified, including acetoclastic, hydrogenotrophic, and hydrogen-dependent methylotrophic types. Substantial methane and CO2 production were detected across altitudes and increased significantly at 15\u00b0C, with both methane and CO2 production rates negatively correlated with altitude. The temperature sensitivity of CO2 production also showed a negative altitude correlation. Methanogens increased substantially over long-term incubation, dominating the archaeal community. At 15\u00b0C, the relative abundance of several methanogenic groups was strongly correlated with altitude, with positive correlations observed for Methanomassiliicoccaceae and Methanoregulaceae, and negative correlations for Methanocellaceae, respectively. Besides altitude, phosphorus, carbon to nitrogen ratio, and pH also affected methanogenic structure, methane and CO2 production, and temperature sensitivities. This study offers new insights into methanogens and methane production in GFS sediments, improving our understanding of GFS carbon cycling and its potential responses to climate change.<\/jats:p>","DOI":"10.1093\/femsec\/fiaf044","type":"journal-article","created":{"date-parts":[[2025,4,21]],"date-time":"2025-04-21T07:40:45Z","timestamp":1745221245000},"source":"Crossref","is-referenced-by-count":7,"title":["Exploring methanogenic archaea and their thermal responses in the glacier-fed stream sediments of Rongbuk River basin, Mt. Everest"],"prefix":"10.1093","volume":"101","author":[{"given":"Wei","family":"Ma","sequence":"first","affiliation":[{"name":"Center for Pan-third Pole Environment, Lanzhou University , Lanzhou 730000 ,","place":["China"]},{"name":"Key Laboratory of Pan-third Pole Biogeochemical Cycling , Gansu Province 730000 ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Miao","family":"Lin","sequence":"additional","affiliation":[{"name":"Center for Pan-third Pole Environment, Lanzhou University , Lanzhou 730000 ,","place":["China"]},{"name":"Key Laboratory of Pan-third Pole Biogeochemical Cycling , Gansu Province 730000 ,","place":["China"]}],"role":[{"vocabulary":"crossref","role":"author"}]},{"given":"Peihua","family":"Shen","sequence":"additional","affiliation":[{"name":"Center for Pan-third Pole Environment, Lanzhou University , Lanzhou 730000 ,","place":["China"]},{"name":"Key Laboratory of Pan-third Pole Biogeochemical Cycling , Gansu Province 730000 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