COMMUNITY CHARACTERISTICS AND INFLUENCING FACTORS OF METHANOGENS IN CASCADE RESERVOIRS IN THE UPPER YELLOW RIVER

WU Yi; MAO Xufeng; SONG Xiuhua; YU Hongyan; TANG Wenjia; XIE Shunbang; LIU Zebi; DING Qizhi

doi:10.13205/j.hjgc.202412002

Volume 42 Issue 12

Dec. 2024

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WU Yi, MAO Xufeng, SONG Xiuhua, YU Hongyan, TANG Wenjia, XIE Shunbang, LIU Zebi, DING Qizhi. COMMUNITY CHARACTERISTICS AND INFLUENCING FACTORS OF METHANOGENS IN CASCADE RESERVOIRS IN THE UPPER YELLOW RIVER[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 8-17. doi: 10.13205/j.hjgc.202412002

Citation:

WU Yi, MAO Xufeng, SONG Xiuhua, YU Hongyan, TANG Wenjia, XIE Shunbang, LIU Zebi, DING Qizhi. COMMUNITY CHARACTERISTICS AND INFLUENCING FACTORS OF METHANOGENS IN CASCADE RESERVOIRS IN THE UPPER YELLOW RIVER[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 8-17. doi: 10.13205/j.hjgc.202412002

Citation:

WU Yi, MAO Xufeng, SONG Xiuhua, YU Hongyan, TANG Wenjia, XIE Shunbang, LIU Zebi, DING Qizhi. COMMUNITY CHARACTERISTICS AND INFLUENCING FACTORS OF METHANOGENS IN CASCADE RESERVOIRS IN THE UPPER YELLOW RIVER[J]. ENVIRONMENTAL ENGINEERING , 2024, 42(12): 8-17. doi: 10.13205/j.hjgc.202412002

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COMMUNITY CHARACTERISTICS AND INFLUENCING FACTORS OF METHANOGENS IN CASCADE RESERVOIRS IN THE UPPER YELLOW RIVER

doi: 10.13205/j.hjgc.202412002

WU Yi^1,2,
MAO Xufeng^{1,2
,
,},
SONG Xiuhua³,
YU Hongyan⁴,
TANG Wenjia⁵,
XIE Shunbang³,
LIU Zebi^1,2,
DING Qizhi⁶

1. Key Laboratory of Tibetan Plateau Land Surface Processes and Ecological Conservation (Ministry of Education), Qinghai Normal University, Xining 810008, China;
2. Qinghai Province Key Laboratory of Physical Geography and Environmental Process, College of Geographical Science, Qinghai Normal University, Xining 810008, China;
3. Qinghai Huangshui National Wetland Park Ecological Management Service Center, Xining 810008, China;
4. Qinghai Qilian Mountain National Park Qinghai Service Guarantee Center, Xining 810008, China;
5. Qinghai Provincial Department of Ecology and Environment, Xining 810008, China;
6. Qinghai Province Ecological Environmental Protection Publicity and Education Center, Xining 810008, China

Received Date: 2024-05-17
Available Online: 2025-01-18

Abstract

Abstract

Reservoir is an important source of methane (CH₄) emissions. The community structure of methanogens in reservoir sediments and its influencing factors are of great significance for understanding the mechanism of CH₄ emissions. Surface sediment samples from 10 cascade reservoirs in the upper Yellow River were collected in May (dry season) and August (wet season) in 2023. 16S rRNA high-throughput sequencing technology, statistical analysis and null model were used to investigate the community characteristics, diversity and community assembly processes of methanogens in sediments of the cascade reservoirs in the upper Yellow River in different seasons. The results showed that: 1) in the dry season, Methanobacterium is the dominant genus, while in the wet season, Methanosarcina takes over as the dominant genus; 2) the reservoir age had a significant effect on α diversity of the methanogenic bacteria community (P<0.05), while the season had a significant effect on β diversity of methanogenic bacteria community (P<0.05); 3) the main environmental factors affecting the composition of methanogenic communities were pH, total nitrogen and temperature. The stochastic process dominated methanogenic community assembly processes, in which drift was the strongest (54.25%). The research findings provide scientific insights for understanding the mechanisms of CH₄ emissions from reservoirs and their regulation.
- sediment,
- CH₄,
- community composition,
- community assembly,
- Qinghai-Tibet Plateau

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References(53)

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