中国湖泊细菌群落的生物地理分布格局及驱动机制——基于文献数据的统计分析

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Abstract In order to examine the biogeographic patterns and assembly of bacterial communities in Chinese lakes, data from the published literature on water or sediment bacteria at the phylum level and environmental factors from 228 lakes were collected. Results showed that the dominant taxa of the water bacteria communities in Chinese lakes were Proteobacteria (35.92%), Actinobacteria (25.03%) and Bacteroidetes (10.77%), and the dominant taxa in sediment were Proteobacteria (40.37%), Chloroflexi (8.74%) and Bacteroidetes (8.55%).Distance decay of water bacteria communities was significantly lower than that of sediment bacteria. There was significant spatial difference of lake bacteria communities between Northern China, Southern China and Tibetan Plateau. The distance decay of bacterial communities was not significant in Northern China, but significant in Tibetan Plateau; in Southern China, the distance decay of bacterial communities was significantin lake water, but not significant in lake sediment. The abundance of Actinobacteria (Southern China>Northern China>Tibetan Plateau) and Bacteroidetes (Tibetan Plateau >Northern China>Southern China) in lake waterwere significantly different between the three regions, while Proteobacteria was not. The abundance of Proteobacteria (Northern China>Southern China> Tibetan Plateau), Chloroflexi (Southern China>Northern China> Tibetan Plateau), and Bacteroidetes (Tibetan Plateau >Northern China>Southern China) in lake sediment were significantly different between the three regions. The main environmental factor influencing bacterial communities in lake water of Northern China was dissolved organic carbon, in Southern Chinawas dissolved oxygen, and in Tibetan Plateau was nitrate nitrogen. The main environmental factor influencing bacterial communities in lake sediment of Northern China were total nitrogen and pH, in Southern China was total phosphorus, and in Tibetan Plateauwas pH. Dispersal limitation and variable selection collectively shaped the biogeographic patterns of lake bacteria in China. Dispersal limitation had less impact on water bacteria than sediment bacteria;it had the greatest impact on water and sediment bacteria inTibetan Plateau lakes, and the least impact on water and sediment bacteria in Northern China lakes. Variable selection had the greatest impact on water and sediment bacteria in Tibetan Plateau lakes, andless impact on water bacteria in Southern China lakes and sediment bacteria in Northern China lakes.

Key words： Chinese lakes bacterial community geographical distance decay variable selection dispersal limitation

Received: 09 November 2021

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X172

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	GAO Peng-fei
	WANG Peng
	DING Ming-jun
	ZHANG Hua
	NIE Ming-hua
	HUANG Gao-xiang

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GAO Peng-fei,WANG Peng,DING Ming-jun等. Biogeographic patterns and assembly mechanisms of bacterial communities in lakes, China-statistical analysis based on the published literature[J]. CHINA ENVIRONMENTAL SCIENCECE, 2022, 42(6): 2754-2763.

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http://www.zghjkx.com.cn/EN/ OR http://www.zghjkx.com.cn/EN/Y2022/V42/I6/2754

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