Diablo Canyon power plant site ecological study annual report; July 1, 1974 - June 30, 1975 and Quarterly Report no. 8 April 1, 1975 - June 30, 1975

Abstract

We continued surveys of permanent and random subtidal stations, completing surveys of 13 permanent stations and 28 random stations during the year. Red abalone numbers continued to decline in Diablo Cove and Control Areas. Giant red sea urchins declined at permanent stations. The bull kelp canopy increased noticeably in Diablo Cove. Most of our time was spent surveying intertidal stations and processing algae samples. Both red and black abalone showed a decrease in numbers in Diablo Cove as well as the Control Area. Sea otters moved north of Diablo Cove to the Pt. Buchon area in the fall of 1974. In the spring of 1975 the rafts moved south again to the vicinity of Pecho Rock. The commercial sea urchin fishery was inactive during most of the year, while the commercial abalone fishery operated at a very low level. Several miscellaneous studies were continued or initiated during the period. 112pp.)