610 



CAMPBELL 



TABLE 3 



NUMBER OF TAXA IDENTIFIED FROM BELEWS LAKE 

 AND THEIR DISTRIBUTION BY ALGAL CLASS, 1972-1976 



in biovolume dominance to representatives of this genus was a steady 

 and continuing process since year 4, before the power plant began 

 operation. 



In several cases taxa exhibited frequencies of dominance by 

 biovolume which were not distributed throughout all main regions of 

 the lake. Although most of these were limited to the base-line period, 

 a few minor examples occurred during the operational years. These 

 distributions were confined to either the most upstream stations or 

 the lower main lake, at the greatest distance from the influence of 

 the power plant. 



With each year of study there was an increase in the total number 

 of taxa identified from the lake (Table 3). The Chlorophyceae 

 contained by far the largest number of taxa and showed an increase 

 each year. The Chlorococcales, the order of the green algae 

 containing the majority of phytoplankton species, on its own 

 embodied more taxa than any class. It also showed steady increases 



