Research on dissolved organic carbon in wetland soils

Carbon cycle in wetland plays an important role in the global climate change and terrestrial ecosystem carbon cycle,and research on wetland soil dissolved organic carbon(DOC) is an important part in the study of carbon cycle in wetlands.The uniqueness of wetland in the soil,vegetation and hydrological process makes the DOC in wetland soil distinct from other types of ecological systems.Wetland soil DOC is an active organic component in wetland ecosystem,and has obvious characteristics of temporal and spatial variation,which is related to many factors,including season,vegetation and other natural factors,and human factors such as land use/management,while its unique ecotype makes wetland soil DOC have important ecological effects.This paper reviews the source,composition and determination methods of DOC,analyzes some influencing factors,and discusses the ecological environment effects of wetland soil DOC.As a conclusion,it points out some problems existing in the research and put forward some prospects for the future direction.