Dissimilatory iron reduction contributes to anaerobic mineralization of sediment in a shallow transboundary lake.

ABSTRACT: Dissimilatory iron reduction (DIR) coupled with carbon cycling is increasingly being recognized as an influential process in freshwater wetland soils and sediments. The role of DIR in organic matter (OM) mineralization, however, is still largely unknown in lake sediment environments. In this study, we clarified rates and pathways of OM mineralization in two shallow lakes with seasonal hydrological connectivity and different eutrophic situations. We found that in comparison with the domination of DIR (55%) for OM mineralization in Lake Xiaoxingkai, the contribution of methanogenesis was much higher (68%) in its connected lake (Lake Xingkai). The differences in rates and pathways of sediment OM mineralization between the two lakes were attributed to higher concentrations of carbonate associa

SUBMITTER: Yuan Y 

PROVIDER: S-EPMC11197486 | biostudies-literature | 2023 Nov

REPOSITORIES: biostudies-literature