溶解有机质(DOM)参与湖泊元素生物地球化学循环,为微生物生存代谢提供能量来源和物质基础,与微生物之间存在复杂的相互关系.文章综述了 DOM 表征手段,阐述了湖泊微生物与 DOM 相互作用关系及其代谢机制,探讨了在气候变化背景下湖泊微生物与 DOM 对气温升高、盐化、富营养化等关键环境因子的响应.未来需进一步开展陆源 DOM输入对湖泊生态系统影响研究,探究湖泊碳库的形成过程及其机制,揭示微生物作用对湖泊碳储存的影响,深化对湖泊生态系统固碳潜力的认识.
Research Frontiers of Interaction Between Microbes and Dissolved Organic Matter in Lakes
Dissolved organic matter(DOM)is involved in the biogeochemical cycle of lake elements,providing energy source and material basis for the survival and metabolism of microorganisms.Thus,there is a close and complex relationship between DOM and microorganisms.Here,we reviewed the characterization methods of DOM,described the interaction and metabolic mechanism between lake microorganisms and DOM,discussed the responses of lake microorganisms and DOM to key environmental factors such as temperature rise,salinization and eutrophication under the background of climate change.Further studies on the impact of terrigenous DOM input on lake ecosystems should be carried out to explore the process and mechanism of lake carbon pool generation,reveal the impact of microbial action on lake carbon storage,and deepen the understanding of the carbon sequestration potential of lake ecosystems.
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