A quantitative ecological study of selected nearshore marine plants and animals at the Diablo Canyon power plant site: a pre-operational baseline, 1973-1978

Gotshall, Daniel W. and Laurent, Laurence L. and Owen, Sandra L. and Grant, John J. and Law, Philip (1984) A quantitative ecological study of selected nearshore marine plants and animals at the Diablo Canyon power plant site: a pre-operational baseline, 1973-1978. Long Beach, CA, California Department of Fish and Game, (Marine Resources Technical Report, 48)

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Abstract

Biologists of the California Department of Fish and Game, under contract with the Pacific Gas and Electric Company, conducted surveys or intertidal and subtidal plants and animals 1n the vicinity of the Diablo Canyon Nuclear Power Plant for the summer of 1973 through 1978. Abundances of the dominant plants and animals were obtained at random as well as permanent stations in Diablo Cove as well as nearby control areas. A total of 643 permanent and random stations were surveyed, 262 in the intertidal and 381 in the subtidal. Natural as well as man-caused occurrences have resulted in several significant changes in plant and animal abundance in the study areas; these include the arrival of the southern front or the sea otter population in Diablo Cove in 1974; a strong red tide bloom in the fall of 1974; and the release of copper ions from the power plant condenser tubes into Diablo Cove during the summer of 1974. Our intertidal and subtidal random station data have shown a strong decline in giant red sea urchin, Strongylocentrotus franciscanus, densities and the surface canopy kelp, Nereocystis/leutkeana, and a corresponding increase in the subcanopy kelps, Pterygophora and Laminaria. Seasonal patterns of abundance of foliose red algae at random intertidal stations occurred at all study areas. Several species intertidal and subtidal invertebrates showed increasing or decreasing trends in levels of abundance during the five year study period covered by the report. Some of these changes in abundance may be related to the natural man-caused impacts mentioned above. (Document has 728 pages)

Item Type: Monograph or Serial Issue
Title: A quantitative ecological study of selected nearshore marine plants and animals at the Diablo Canyon power plant site: a pre-operational baseline, 1973-1978
Personal Creator/Author:
CreatorsEmail
Gotshall, Daniel W.
Laurent, Laurence L.
Owen, Sandra L.
Grant, John J.
Law, Philip
Series Name: Marine Resources Technical Report
Number: 48
Date: 1984
Publisher: California Department of Fish and Game
Place of Publication: Long Beach, CA
Latitude: 35.124
Longitude: 120.512
Issuing Agency: California Department of Fish and Game
Uncontrolled Keywords: Diablo Canyon power plant; California; intertidal survey; subtidal survey; giant red sea urchin; Strongylocentrotus franciscanus; Nereocystis leutkeana
Subjects: Ecology
Biology
Item ID: 775
Depositing User: Joan Parker
Date Deposited: 07 Mar 2008 17:31
Last Modified: 29 Sep 2011 21:37
URI: http://aquaticcommons.org/id/eprint/775

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