Heilongjiang River Fisheries Research Institute, Chinese Academy of Fishery Sciences, Harbin 150070, China.
Heilongjiang River Basin Fisheries Ecology Observation and Research Station of Heilongjiang Province, Harbin 150070, China.
Int J Environ Res Public Health. 2022 Dec 15;19(24):16870. doi: 10.3390/ijerph192416870.
Jingpo Lake is the largest mountain barrier lake in China and plays a key role in breeding, power generation, and providing a source of drinking water. Microbes are important participants in the formation of lake resources and energy cycles. However, the ecological protection of Jingpo Lake has faced serious challenges in recent years. In this study, we investigate the responses of the microbial community's composition of sediments at five locations to an environmental gradient representing water quality and water-depth changes using a metagenomic sequence. We found that the diversity and composition of the microbiota sediments were altered spatially and correlated with the physicochemical factors of water samples. In the microbial community, relatively lower Chao1, alternating conditional expectations, and Shannon and Simpson indices were found at the shallowest location with higher total phosphorus and chlorophyll . Furthermore, the Kyoto Encyclopedia of Genes and Genomes analysis revealed that the metabolism function was the most abundant functional classification in Jingpo Lake. The levels of total phosphorus, chlorophyll and pH were positively correlated with the abundance of and the bacterial functions of the carbohydrate metabolism and amino acid metabolism. In conclusion, our results reveal the physical and chemical characteristics, as well as the microbial community characteristics, of Jingpo Lake, which provides new insights for studying the relationship between environmental factors and the bacterial community distribution of freshwater ecosystems, in addition to also providing a theoretical basis for the environmental monitoring and protection of the lake.
景颇湖是中国最大的山地堰塞湖，对养殖、发电和提供饮用水源起着关键作用。微生物是湖泊资源和能量循环形成的重要参与者。然而，近年来，景颇湖的生态保护面临着严峻的挑战。在这项研究中，我们使用宏基因组序列调查了五个地点沉积物微生物群落组成对水质和水深变化环境梯度的响应。我们发现，微生物群落的多样性和组成在空间上发生了变化，并与水样的理化因子相关。在微生物群落中，在总磷和叶绿素最高的最浅位置发现了相对较低的 Chao1、交替条件期望和香农和辛普森指数。此外，京都基因与基因组百科全书分析显示，代谢功能是景颇湖中最丰富的功能分类。总磷、叶绿素和 pH 值与和细菌的碳水化合物代谢和氨基酸代谢功能的丰度呈正相关。总之，我们的结果揭示了景颇湖的理化特征和微生物群落特征，为研究淡水生态系统环境因素与细菌群落分布的关系提供了新的见解，也为湖泊的环境监测和保护提供了理论依据。
