Wet ecosystems are important in terms of global greenhouse gas emissions, where a high soil water content is one of the most typical features. However, the roles of hydrogeological properties in sediment during the emission process of methane and carbon dioxide remain to be researched, especially in lake ecosystems. In this study, through investigating the layered sediment in Chaohu Lake, we discovered that strong correlations exist between the water content and microbial gas emissions (methane and carbon dioxide). To further examine these correlations, a systematic analysis of the hydrogeological properties in sediment, gas emission features, methane bubble emission theories and microbiomics was conducted. The results revealed that microbial methane emissions can influence sediment structure and the interstitial water content. Differently, the similar distributions in different layers probably lead to the correlations between microbial carbon dioxide emission and the water content. This research also discusses the connections with other hydrogeological parameters (particle features, interstitial space, etc.) during the emission process. In addition, this study addresses the significance of methane emissions for the material exchange between overlying water and sediment. The effect of microbial gas emissions on sediment physical‐chemical properties also provides meaningful information for researching the relationships among environmental factors and microbial ecology.

中文翻译：

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湖泊沉积物中水文地质因素与两种温室气体排放的关系研究

就全球温室气体排放而言，湿的生态系统很重要，其中高土壤水分是最典型的特征之一。但是，甲烷和二氧化碳排放过程中沉积物的水文地质性质的作用仍有待研究，特别是在湖泊生态系统中。在这项研究中，通过调查巢湖的分层沉积物，我们发现水含量与微生物气体排放量（甲烷和二氧化碳）之间存在很强的相关性。为了进一步检查这些相关性，对沉积物中的水文地质特性，气体排放特征，甲烷气泡排放理论和微生物组学进行了系统分析。结果表明，微生物甲烷的排放可以影响沉积物的结构和间隙水含量。不同的是 不同层中的相似分布可能导致微生物二氧化碳排放与水含量之间的相关性。这项研究还讨论了在排放过程中与其他水文地质参数（颗粒特征，间隙空间等）的联系。此外，这项研究还探讨了甲烷排放对于上覆水和沉积物之间物质交换的重要性。微生物气体排放对沉积物理化性质的影响也为研究环境因素与微生物生态之间的关系提供了有意义的信息。这项研究还讨论了在排放过程中与其他水文地质参数（颗粒特征，间隙空间等）的联系。此外，这项研究还探讨了甲烷排放对于上覆水和沉积物之间物质交换的重要性。微生物气体排放对沉积物理化性质的影响也为研究环境因素与微生物生态之间的关系提供了有意义的信息。这项研究还讨论了在排放过程中与其他水文地质参数（颗粒特征，间隙空间等）的联系。此外，这项研究还探讨了甲烷排放对于上覆水和沉积物之间物质交换的重要性。微生物气体排放对沉积物理化性质的影响也为研究环境因素与微生物生态之间的关系提供了有意义的信息。