Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes

Jian Yang; Bingfu Yao; Min Cai; Mingxian Han; Zenghui Wu; Pingping Zhang; Haiyi Xiao; Jibin Han; Xiying Zhang; Hongchen Jiang

doi:10.1007/s12583-024-0139-4

Article Contents

Journal of Earth Science > 2025 > Accepted Manuscript

Jian Yang, Bingfu Yao, Min Cai, Mingxian Han, Zenghui Wu, Pingping Zhang, Haiyi Xiao, Jibin Han, Xiying Zhang, Hongchen Jiang. Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes. Journal of Earth Science. doi: 10.1007/s12583-024-0139-4

Citation:

Jian Yang, Bingfu Yao, Min Cai, Mingxian Han, Zenghui Wu, Pingping Zhang, Haiyi Xiao, Jibin Han, Xiying Zhang, Hongchen Jiang. Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes. Journal of Earth Science. doi: 10.1007/s12583-024-0139-4

Citation:

Jian Yang, Bingfu Yao, Min Cai, Mingxian Han, Zenghui Wu, Pingping Zhang, Haiyi Xiao, Jibin Han, Xiying Zhang, Hongchen Jiang. Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes. Journal of Earth Science. doi: 10.1007/s12583-024-0139-4

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Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes

doi: 10.1007/s12583-024-0139-4

1 State Key Laboratory of Biogeology and Environmental Geology, China University of Geosciences, Wuhan, 430074, China;
2 Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes, Qinghai Institute of Salt Lakes, Chinese Academy of Sciences, Xining, 810008, China;
3 Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China

Funds:

This research was supported by grants from the National Natural Science Foundation of China (Grant Nos. 42272356, 92251304), the Kunlun Talented People of Qinghai Province, High-end Innovation and Entrepreneurship talents (Grant to Jiang Hongchen), the Qinghai Provincial Key Laboratory of Geology and Environment of Salt Lakes (The Science and Technology Plan Project of Qinghai Province Incentive Fund, grant No. 2024-KFKT-A08), the 111 Program (State Administration of Foreign Experts Affairs &

the Ministry of Education of China, grant B18049), the Second Tibetan Plateau Scientific Expedition and Research Program (STEP) (2019QZKK0805), the Science and Technology Plan Project of Qinghai Province (Grant No. 2022-ZJ-Y08), and Fundamental Research Funds for the Central Universities, China University of Geosciences (Wuhan).

Received Date: 04 Dec 2024
Available Online: 06 Jan 2025

Abstract

Abstract

Saline lakes are simultaneously affected by salinity change due to climate change and increased nitrogen (N) input from human activities and atmosphere deposition. However, it is poorly known about how the salinity change and increased N input synchronously influence microbial community and its associated organic carbon mineralization in saline lakes. Here, lake sediments with different salinity (0.7–376.3 g L^-1) were employed to establish microcosm experiments, supplemented with different concentrations of NH₄NO₃, followed by incubation for 6 months and subsequent analyses of geochemistry and microbial community composition of the incubated sediments. The results showed that salinity change relative to nitrogen increase had a greater impact on microbial abundance, diversity, community structure and organic carbon mineralization in the studied lake sediments. Salinity increase significantly (P <0.05) reduced CO₂ production rates and bacterial diversity in lake sediments with different amounts of N additions, and the magnitude of the effect of salinity decreased with increasing N. Taken together, our results provide a more comprehensive understanding of the synchronous effects of salinity changes and increased N input on microbial abundance, diversity, community structure, and organic carbon mineralization in lakes with a wide salinity range.
- nitrogen input,
- organic carbon mineralization,
- microbial community,
- salinity,
- lake sediment

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Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes

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Salinity change overrides nitrogen increase in affecting microbial abundance, diversity, community composition and organic carbon mineralization in saline lakes

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