Linkages between soil CO 2 emission and dissolved organic carbon in tropical peatland

Abstract Tropical peatlands significantly contribute to ecosystem carbon and are essential in controlling the carbon balance. Soil CO 2 emissions and dissolved organic carbon (DOC) are processes of carbon release that are intricately associated with climate change. This research investigates the relationship between soil CO 2 emissions and DOC in soil systems. The approach employed involves both trenching and non-trenching experimental methods. The research site was located in Buatan Village, Siak Indrapura District, Riau Province. Peat water sampling and CO 2 flux measurements were performed monthly over five consecutive days for one year. The results indicated a negative correlation between soil CO 2 emissions and DOC concentrations ( P < 0.05). These findings suggest that microbial utilization of carbon substrates results in greater transformation into CO 2 than into dissolved carbon, driven by intensified surface decomposition.