Fecal-related anthropogenic sources are key determinants of lake microbiomes through microbial source tracking

doi:10.1016/j.envpol.2023.122507

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	Fecal-related anthropogenic sources are key determinants of lake microbiomes through microbial source tracking
	Zhang,Zhongfu; Qi,Jinfeng; Yu,Qingguo; Wang,Shenglong; Wang,Hang
	2023
发表期刊	ENVIRONMENTAL POLLUTION
ISSN	1873-6424
卷号	336 页码:122507
摘要	Lake microbiomes are essential indicators of lake health and are strongly influenced by allochthonous microbial communities from various sources within the watershed. However, quantifying the contributions of multiple inputs to lake microbiomes is challenging because of the complex nature of river-lake systems and the presence of many untraceable sources. Here, Jianhu Lake--a geographically simple and closed plateau lake in southwestern China, was surveyed to disentangle the contributions of five distinct sources (three input rivers that receive town sewage, stormwater runoff, and creek spring water, as well as two nonpoint sources, duck ponds and dry farmland) to the overall lake microbiomes. We found that feces-loading sources, namely town sewage and duck aquaculture, accounted for 48.7% of the total variations in lake microbiomes. In contrast, the combined contribution of the remaining three sources amounted to 13.21%, despite these less-influential sources (e.g., stormwater runoff) may introduce an even larger volume of allochthonous materials into the lake. In addition, approximately 38.1% of the variations in the lake microbiomes were attributed to unknown sources. Sewage effluents also caused a significant loss of lake microbial diversity, and there was a tendency for large-scale microbial homogeneity in lake sediments that resembled those from duck ponds. We then used a targeted approach to track host-specific fecal pollution, and found that human feces were the primary source, followed by ruminant and chicken/duck feces, all of which can be successfully traced back to the feces-loading sources. In our further modelling of sediment transport from three rivers into the whole lake, we observed a significant relationship between sediment accumulation and adsorbed microorganisms only for the sewage-receiving river. Together, lines of evidence indicate that both point and nonpoint fecal-related anthropogenic sources possess discriminatory power for shaping microbial geographic patterns of the lake, posing threats to the survival of local indigenous lake microbiomes.
关键词	Microbial geography Plateau region Lake Source tracking Sewage Anthropogenic impact GENETIC-MARKERS FRESH-WATER POLLUTION BACTERIA MICROORGANISMS IDENTIFICATION BACTEROIDALES DISTRIBUTIONS POPULATION TRANSPORT
DOI	10.1016/j.envpol.2023.122507
收录类别	SCI
WOS记录号	WOS:001075728100001
引用统计
文献类型	期刊论文
条目标识符	http://ir.kib.ac.cn/handle/151853/75576
专题	中国科学院昆明植物研究所
推荐引用方式 GB/T 7714	Zhang,Zhongfu,Qi,Jinfeng,Yu,Qingguo,et al. Fecal-related anthropogenic sources are key determinants of lake microbiomes through microbial source tracking[J]. ENVIRONMENTAL POLLUTION,2023,336:122507.
APA	Zhang,Zhongfu,Qi,Jinfeng,Yu,Qingguo,Wang,Shenglong,&Wang,Hang.(2023).Fecal-related anthropogenic sources are key determinants of lake microbiomes through microbial source tracking.ENVIRONMENTAL POLLUTION,336,122507.
MLA	Zhang,Zhongfu,et al."Fecal-related anthropogenic sources are key determinants of lake microbiomes through microbial source tracking".ENVIRONMENTAL POLLUTION 336(2023):122507.

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