Bryozoan-Algal Associations in Southern California Waters

Intertidal bryozoan algal associations were studied along the southern California coastline between La Jolla and Santa Barbara and on Santa Catalina Island. Seventeen species of bryozoans were identified incrusting 6 species of Chlorophyta, 1 3 species of Phaeophyta and 43 species of Rhodophyta. Collections were made at 15 southern California stations; herbarium specimens of algae from 32 southern California stations were examined. Factors affecting bryozoan preference for an algal substrate were: (1) the location of algae in the littoral region; (2) availability of various substrata; (3) production of anti-fouling substances by brown and possibly red algae.