GeochemistryPublished 11 July 2025Carbon fertilization of autochthonous production in karst surface waters and its role in carbon reduction and eutrophication mitigation—a nature-based solution (NbS)Mingyu Shao · Zaihua Liu · Sibo Zeng · Hailong Sun · Haibo HeFrontiers in Geochemistrydoi 10.3389/fgeoc.2025.1622714