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New Insights into Microbial Interactions with Dissolved Organic Matter in Acid Mine Drainage with the Integration of Microbial Community and Chemical Composition Analysis
ACS ES&T Water ( IF 4.8 ) Pub Date : 2022-01-25 , DOI: 10.1021/acsestwater.1c00273 Zhixiang She 1, 2 , Jin Wang 1, 2 , Chen He 3 , Xin Pan 1, 2 , Quan Shi 3 , Rui Shao 4 , Yunyun Li 3 , Zhengbo Yue 1, 2
ACS ES&T Water ( IF 4.8 ) Pub Date : 2022-01-25 , DOI: 10.1021/acsestwater.1c00273 Zhixiang She 1, 2 , Jin Wang 1, 2 , Chen He 3 , Xin Pan 1, 2 , Quan Shi 3 , Rui Shao 4 , Yunyun Li 3 , Zhengbo Yue 1, 2
Affiliation
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Acid mine drainage (AMD) environments are one of the most extreme ecosystems on earth, and their biogeochemical cycling has been widely studied. However, the carbon cycling underlying microbial interactions with dissolved organic matter (DOM) is poorly understood in these environments. Here, we evaluated the relationships between microbial populations and DOM pools in an AMD lake by combining high-throughput microbial and chemical compositional analyses. The results demonstrated that microalgae were the predominant primary producers in the system and significantly contributed to the total DOM concentration in the water column, whereas DOM chemodiversity was correlated with bacterial community diversity. Network analyses further revealed that DOM associated with microalgae had low diversity but high relative abundance, suggesting microalgal selective organic matter contribution to the DOM pool. Conversely, diverse DOM molecules with generally low abundance were associated with heterotrophic acidophiles, including members of Alphaproteobacteria, Actinobacteria, Firmicutes, and Acidobacteria. Moreover, microalgae and bacteria exhibited predominantly positive co-occurrences with potential metabolic interactions via DOM exchange. Taken together, this study provides new insights into the microbe–DOM interactions in extreme AMD ecosystems and has significant implications for understanding the carbon cycle and microbial metabolism in extreme environments.
中文翻译：
通过微生物群落和化学成分分析的整合，对酸性矿山排水中微生物与溶解有机物相互作用的新见解
酸性矿山排水（AMD）环境是地球上最极端的生态系统之一，其生物地球化学循环已被广泛研究。然而，在这些环境中，对微生物与溶解有机物 (DOM) 相互作用的潜在碳循环知之甚少。在这里，我们通过结合高通量微生物和化学成分分析来评估 AMD 湖中微生物种群和 DOM 池之间的关系。结果表明，微藻是系统中主要的初级生产者，对水体中的总 DOM 浓度有显着贡献，而 DOM 化学多样性与细菌群落多样性相关。网络分析进一步表明，与微藻相关的 DOM 多样性较低，但相对丰度较高，表明微藻对 DOM 池的选择性有机质贡献。相反，丰度普遍较低的多种 DOM 分子与异养嗜酸菌有关，包括Alphaproteobacteria、Actinobacteria、Firmicutes和Acidobacteria。此外，微藻和细菌通过 DOM 交换与潜在的代谢相互作用表现出主要的阳性共现。总之，这项研究为极端 AMD 生态系统中的微生物-DOM 相互作用提供了新的见解，并对了解极端环境中的碳循环和微生物代谢具有重要意义。
更新日期：2022-02-11
中文翻译：
通过微生物群落和化学成分分析的整合，对酸性矿山排水中微生物与溶解有机物相互作用的新见解
酸性矿山排水（AMD）环境是地球上最极端的生态系统之一，其生物地球化学循环已被广泛研究。然而，在这些环境中，对微生物与溶解有机物 (DOM) 相互作用的潜在碳循环知之甚少。在这里，我们通过结合高通量微生物和化学成分分析来评估 AMD 湖中微生物种群和 DOM 池之间的关系。结果表明，微藻是系统中主要的初级生产者，对水体中的总 DOM 浓度有显着贡献，而 DOM 化学多样性与细菌群落多样性相关。网络分析进一步表明，与微藻相关的 DOM 多样性较低，但相对丰度较高，表明微藻对 DOM 池的选择性有机质贡献。相反，丰度普遍较低的多种 DOM 分子与异养嗜酸菌有关，包括Alphaproteobacteria、Actinobacteria、Firmicutes和Acidobacteria。此外，微藻和细菌通过 DOM 交换与潜在的代谢相互作用表现出主要的阳性共现。总之，这项研究为极端 AMD 生态系统中的微生物-DOM 相互作用提供了新的见解，并对了解极端环境中的碳循环和微生物代谢具有重要意义。
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