Tiffany, M. A.. San Diego State University, Dept. of Biology, mtiffany@sunstroke.sdsu.edu
Watts, J. A.. San Diego State University, Dept. of Biology, jwatts@sunstroke.sdsu.edu
Hurlbert, S. H.. San Diego State University, Dept. of Biology, shurlbert@sunstroke.sdsu.edu

 
PLANKTON DYNAMICS OF CALLIFORNIA'S LARGEST LAKE, THE SALTON SEA
 
The Salton Sea is a eutrophic saline lake in southeastern California which is a repository of agricultural, municipal and industrial wastewaters from the Imperial, Coachella and Mexicali valleys. It has been experiencing major wildlife mortalities of birds and fish. Possible causes are temperature extremes, high ammonia concentrations and direct or indirect effects of toxic algae. Study of temperature and oxygen profiles show that the Salton Sea is a warm polymictic lake, stratifying for days or weeks in the summer with the stratification breaking down during heavy wind events. Anoxia at depth occurs for periods in the summer. In the summer an ichthyotoxic raphidophyte, Chattonella marina, was the dominant algal species at a time when large die-offs of tilapia and croaker were occurring. Dinoflagellates were often important components of the phytoplankton, including several that are known to be toxic. In the summer the main metazooplankters were the rotifer Brachionus rotundiformis and the copepod Apocyclops dengizicus. In winter Synchaeta sp., a rotifer, and larvae of the barnacle Balanus amphitrite and of the polychaete Neanthes succinea became dominant. Ciliates such as Fabrea salina, Condylostoma spp. and tintinnids were important parts of the zooplankton.
 
Day: Friday, Feb. 5
Time: 04:00 - 04:15pm
Location: Eldorado Hotel
 
Code: SS48FR0415E