抄録
In this paper, three main components, i.e., the tree growth rate, mortality, and young tree invasion, are refined for a vegetation dynamics model. The model has been proposed for stochastically predicting the vegetation dynamics for long duration along a river channel network. The new growth rate curve is derived by introducing inhibition effect of larger trees into the conventional Richards growth curve. As for the mortality curve, Gaussian distribution is employed to express randomness of tree damage due to differences of individual tree conditions on a floodplain. The young tree invasion is modeled by taking both seed propagation and vegetative reproduction into account. The results for predicting current vegetation distributions in Kako River precisely confirm the high applicability of the present refinement and its optimal model parameters.
