COMPOSITION AND DENSITY OF DICTYOSTELID CELLULAR SLIME MOLDS IN ALDER FORESTS IN THE KUSHIRO MOOR AND ITS SURROUNDING DISTRICT

Abstract

Species composition and density of Dictyostelid cellular slime molds in alder forests in the Kushiro moor and its surrounding district were investigated by means of a clonal isolation technique. A total of 830 clones was produced on agar plates using pregrown bacteria as a nutrient. Seven species, Dictyostelium mucoroides BREFELD, D.minutum RAPER, D.purpureum OLIVE, D.lacteum VAN TIEGHEM, D.discoideum RAPER, Polysphondylium pallidum OLIVE and P.violaceum BREFELD, were included. In this study, absolute densities, relative densities and frequencies of the cellular slime molds in each collecting sites and presence values of each species throughout the area of study were calculated. The composition and density in the alder forests were discussed as compared with those in the high moor of the Kushiro moor and other places reported previously.