Lability and spectroscopic characteristics of dissolved organic matter from Amazonian rivers

摘要

Black(BW)and white(WW)waters showed distinct characteristic,including the Labile(LOM)and recalcitrant OM(ROM)content.Spectroscopic parameters and fluorophores were determined.In the drought season,WW rivers content most ROM,according to less decreasing of fluorophores during kinetic experiment and higher SUVA254 values.For the flooded period,a distinct behaviour was observed.BW had around three times less LOM content than WW samples,despite the highest dissolved organic carbon(DOC)concentration due to the intense runoff process observed during the rainy season.