Inputs and transformation of allochthonous particulate organic matter in a headwater stream

摘要: Inputs and outputs of allochthonous particulate organic matter were measured during 15 months in the upper part a beech forest headwater stream. estimated to 716 g m−2 yr−1, leaves made up 71%. Outputs 535 yr−1 consisted mainly FPOM (92%). Therefore, significant transformation CPOM into took place. The mean concentration varied between 0.6 3.4 mg 1−1, but daily variations greatly surpassed seasonal variations. As discharge was rather constant, observed due external disturbances, especially precipitation. A tentative scheme for leaf processing is established from present data previous studies area, indicating that takes place MPOM pool microbial invertebrate make about 50% each total intra-system processing.