Abstract
Seasonal distribution of phosphorus and phosphate-solubilizing bacteria (PSB) in the surface sediments (0-12 cm layer) of Lake Suwa and Lake Kizaki were investigated from 1988 to 1989. Sediment-bound phosphate included organic and inorganic forms and the inorganic fraction contained most of the phosphorus that can be released into water. PSB ranged from 104-106⋅g-1 sediment. Aerobic PSB showed a significant correlation with inorganic phosphorus.