Uncovering the processes of microbial community assembly in the near-surface sediments of a climate-sensitive glacier-fed lake

Lu, Meiqing1,2; Luo, Xin1; Jiao, Jiu Jimmy1; Li, Hailong2,3; Kuang, Xingxing2,3; Wang, Xuejing2,3; Feng, Yuqing2,3; Zheng, Chunmiao2,3

2023-11-01

10.1016/j.jenvman.2023.118714

JOURNAL OF ENVIRONMENTAL MANAGEMENT   影响因子和分区

0301-4797

1095-8630

Glacier-fed lakes are characterized by cold temperatures, high altitudes, and nutrient-poor conditions. Despite these challenging conditions, near-surface sediments of glacier-fed lakes harbor rich microbial communities that are critical for ecosystem functioning and serve as a bridge between aquatic ecology and the deep subsurface biosphere. However, there is limited knowledge regarding the microbial communities and their assembly pro-cesses in these sediments, which are highly vulnerable to climate change. To fill this knowledge gap, this study systematically analyzed environmental variables, microbial communities, diversity, co-occurrence relationships, and community assembly processes in the near-surface sediments of a glacier-fed lake in the Tibetan Plateau. The results revealed distinct vertical gradients in microbial diversity and subcommunities, highlighting the signifi-cant influence of selection processes and adaptive abilities on microbial communities. Specifically, specialists played a crucial role within the overall microbial communities. Microbial assembly was primarily driven by homogeneous selection, but its influence declined with increasing depth. In contrast, homogenizing dispersal showed an opposite pattern, and the bottom layer exhibited heterogeneous selection and undominated processes. These patterns of microbial assembly were primarily driven by environmental gradients, with significant con-tributions from processes associated to ammonium and organic matter deposition, as well as chemical precipi-tation in response to a warming climate. This study enhances our understanding of the microbial communities and assembly processes in the near-surface sediments of glacier-fed lakes and sheds light on geo-microbiological processes in climate-sensitive lacustrine sediments.

Microbial community assembly Specialists Glacier-fed lake Tibetan plateau Climate change

SCI ; EI

英语

其他

National Natural Science Foundation of China (NSFC)[91747204] ; General Research Fund of the Research Grants Council of the Hong Kong Special Administrative Region, China["17303519","17307620"]

Environmental Sciences & Ecology

Environmental Sciences

WOS:001052881200001

ACADEMIC PRESS LTD- ELSEVIER SCIENCE LTD

20233614690325

Aquatic ecosystems ; Aquatic organisms ; Assembly ; Lakes ; Microorganisms ; Precipitation (chemical) ; Sedimentology

Atmospheric Properties:443.1 ; Ecology and Ecosystems:454.3 ; Biology:461.9 ; Marine Science and Oceanography:471 ; Geology:481.1 ; Chemical Operations:802.3

ENVIRONMENT/ECOLOGY

Web of Science

1.Univ Hong Kong, Dept Earth Sci, Room 302,James Lee Sci Bldg,Pokfulam Rd, Hong Kong, Peoples R China
2.Southern Univ Sci & Technol, Sch Environm Sci & Engn, Shenzhen 518055, Peoples R China
3.Southern Univ Sci & Technol, Guangdong Prov Key Lab Soil & Groundwater Pollut C, Shenzhen 518055, Peoples R China

Lu, Meiqing,Luo, Xin,Jiao, Jiu Jimmy,et al. Uncovering the processes of microbial community assembly in the near-surface sediments of a climate-sensitive glacier-fed lake[J]. JOURNAL OF ENVIRONMENTAL MANAGEMENT,2023,345.

Lu, Meiqing.,Luo, Xin.,Jiao, Jiu Jimmy.,Li, Hailong.,Kuang, Xingxing.,...&Zheng, Chunmiao.(2023).Uncovering the processes of microbial community assembly in the near-surface sediments of a climate-sensitive glacier-fed lake.JOURNAL OF ENVIRONMENTAL MANAGEMENT,345.

Lu, Meiqing,et al."Uncovering the processes of microbial community assembly in the near-surface sediments of a climate-sensitive glacier-fed lake".JOURNAL OF ENVIRONMENTAL MANAGEMENT 345(2023).