Study on Mechanisms of Material Cycling in River Ecosystem with Water, Material and Organism Dynamics

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The present study is conducted to be clarified the interaction system between water and material transports under fluvial processes with biological communities. These topics are carried out by arranging as the following three sub themes : (1) the mechanism of water-sediment-organic-nutrient material transportation processes with riparian vegetations, (2) the interaction system of water and materials between surface and subsurface water of sand bar, (3) the mechanisms of production and material cycling of riverine algae, aquatic insects, and fish, and (4) the combining of findings from these three sub themes for numerical dynamics modeling.