Dinâmica do carbono orgânico e processos hidrológicos na escala da bacia hidrográfica: Uma revisão

Abstract

Storage and fluxes of organic carbon (OC) on catchments are governed by interactions between hydrological and biogeochemical processes. Classical studies show the role of organic matter on the aggregate stability, physical and chemical properties and soil quality. However, the main mechanisms of organic carbon destabilization, storage and fluxes remains partially described and understood. This paper presents a conceptual review describing the organic carbon dynamic emphasizing the interactions between hydrological, sedimentological and biogeochemical processes on catchment scale. Catchment functioning through the interactions of riparian zones, hillslopes and streams reflects the temporal variability and the spatial heterogeneity of dissolved (DOC) and particulate (POC) organic carbon on streams and shallow groundwater. Thus, here we described the role of the main mechanisms responsible for interactions between soil and water and the organic carbon cycle on landscape. Furthermore, we seek to evidence uncertainties and gaps on describing and understanding of the processes related with the organic carbon dynamic on catchments.