島根県大橋川のヨシに付着する珪藻種

Epiphytic diatom assemblages on reed (Phragmites australis) stems were analyzed. Fourteen samples from reed stems and one from Japanese eelgrass were collected in December 2006 and April/May 2007 from the Ohashi-Kensaki River network. This river network forms the connection between two large lagoonal lakes in west-central Japan, Lake Shinji and Lake Nakaumi. Seventy-six taxa were observed on reed stems in these rivers. We present taxonomical information and light microscope images of the 17 most common taxa present in these samples. The genus Tabularia was the dominant group. These observations suggest that diatom assemblages on reed stems are influenced by seasonality and current velocity. Salinity effects can also be seen in these samples, but they do not seem to be a major control on the reed stem assemblage.