喀斯特地下水DOM的来源、转化及识别手段研究进展

Progress in the study of sources,transformations and identification methods of dissolved organic matter(DOM)in karst groundwater

地下水中的溶解有机质(DOM)在生态系统和生物多样性中发挥关键作用,影响全球碳循环。喀斯特地下水作为世界上最大的地下水体,富含溶解无机碳(DIC),在微生物作用下,溶解无机碳被转化成有机碳,在碳循环中起着重要的作用。然而,关于DOM的研究主要集中在地表水环境,而以化能自养为主的地下水生态系统,其DOM的研究相对不足,尤其是占有重要地位的喀斯特地下水。针对以上科学问题,对喀斯特地下水中DOM来源、转化与识别手段研究进展进行了总结,重点突出了喀斯特地下水DOM在全球碳循环中的重要性,并展望了未来在喀斯特地下水DOM研究中高分辨率动态监测的必要性。

The dissolved organic matter(DOM)within groundwater serves a pivotal function in ecosystem integrity and biodiversity conservation,significantly impacting the global carbon cycle.Karst groundwater,as the largest underground water body in the world,is rich in dissolved inorganic carbon(DIC),which is converted into organic carbon by the action of microorganisms,and playing a significant role in the carbon cycle.However,current research on DOM mainly focus on the surface water environment,while DOM studies of groundwater ecosystems dominated by chemoautotrophy are relatively insufficient,especially in karst groundwater,which occupies an important position.To address the above scientific issues,this article synthesizes advancements in the study of DOM sources,transformation processes,and identification methods in karst groundwater.It highlights the significance of DOM within karst groundwater in the global carbon cycle and emphasizes the imperative of employing high-resolution,dynamic monitoring strategies in future research endeavors.