State Key Laboratory of Freshwater Ecology and Biotechnology, Institute of Hydrobiology, Chinese Academy of Sciences, Wuhan, People's Republic of China.
University of Chinese Academy of Sciences, Beijing, People's Republic of China.
Appl Environ Microbiol. 2023 Mar 29;89(3):e0211222. doi: 10.1128/aem.02112-22. Epub 2023 Mar 7.
represents a microscopic forest that provides many ecological niches and fosters a diverse microbiota. However, the microbial community on in brackish lakes is still poorly understood. In this study, the epiphytic bacterial communities of in Qinghai Lake were investigated at three life stages (attached, floating, and decomposing). We found that in the attached stage, was enriched with chemoheterotrophic and aerobic microorganisms, including - and . The proportion of phototrophic bacteria was higher in the floating stage, especially . The decomposing stage fostered an abundance of bacteria that showed vertical heterogeneity from the surface to the bottom. The surface layer of contained mainly stress-tolerant chemoheterotrophic and photoheterotrophic bacteria, including and . The microbial community in the middle layer was similar to that of floating-stage . Purple oxidizing bacteria were enriched in the bottom layer, with , , and as the dominant genera. The Shannon and Chao1 indices of epibiotic bacterial communities increased monotonically from the attached stage to the decomposing stage. Microbial community composition and functional predictions indicate that a large number of sulfur cycle-associated bacteria play an important role in the development of . These results suggest that the microbial assemblage on in a brackish lake is complex and contributes to the cycling of materials. represents a microscopic forest that provides many ecological niches fostering a diverse microbiota, with a complex and intimate relationship between and bacteria. Many studies have focused on the microbiology of freshwater , but the composition and succession of microorganisms in different life stages of , especially in brackish water, have not been explored. In this study, we investigated the microbial assemblages in the life stages of in the brackish Qinghai Lake. We show that heterotrophic and photosynthetic autotrophic bacteria are enriched in attached and floating , respectively, whereas the epiphytic bacterial community shows vertical heterogeneity in decomposing mats.
代表了一个微观的森林，提供了许多生态小生境，并促进了多样化的微生物群落。然而，关于咸水湖泊中 的微生物群落仍然知之甚少。在这项研究中，我们调查了青海湖中 三个生命阶段（附着、漂浮和分解）的附生细菌群落。我们发现，在附着阶段， 富含化能异养和好氧微生物，包括 - 和 。在漂浮阶段，光合细菌的比例较高，尤其是 。分解阶段促进了大量从表面到底部具有垂直异质性的细菌的丰富。 的表面层主要含有耐应激的化能异养和光异养细菌，包括 和 。中层的微生物群落与漂浮阶段相似。紫色氧化细菌在底层富集，主要属为 、 、和 。附生细菌群落的 Shannon 和 Chao1 指数从附着阶段到分解阶段单调增加。微生物群落组成和功能预测表明，大量与硫循环相关的细菌在 的发育中起着重要作用。这些结果表明，咸水湖泊中 的微生物组合是复杂的，并有助于物质的循环。 代表了一个微观的森林，提供了许多生态小生境，促进了多样化的微生物群落， 与细菌之间存在复杂而密切的关系。许多研究都集中在淡水 的微生物学上，但不同生命阶段的 ，尤其是在咸水中的微生物组成和演替尚未得到探索。在这项研究中，我们调查了咸水青海湖中 的生命阶段的微生物组合。我们表明，在附着和漂浮 中分别富集了异养和光合自养细菌，而在分解垫中，附生细菌群落表现出垂直异质性。
