| The purpose of this study is to investigate the distribution pattern and the density of soil seed banks in a sand-gravel bar, and the influence on standing vegetation by the soil seeds banks. Measured density of the soil seed banks(seeds/m2) were 928 and 5,344 for disturbing environment characterized by gravel materials and for piled environment characterized sand materials, respectively. The soil seed banks were widely distributed regardless of the species. However, distribution of plants was heterogeneous. It is not dependent on seed distribution, but on a physiological condition of the place Consequently, although the soil seed banks and vegetation cover were significantly correlated, the local physical environment was more predominant factor than the soil seed banks to determine the bar vegetation in the gravel-bed river. |
