Progress in the study of sources,transformations and identification methods of dissolved organic matter(DOM)in karst groundwater
The dissolved organic matter(DOM)within groundwater serves a pivotal function in ecosys-tem 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 signifi-cant 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 rela-tively 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,trans-formation 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.
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