recovered after spring barnacle set; Fucus also 

 recolonized the following spring. 



Oslofjord, Norway. Norw. J. Dot. Vol. 25, pp. 

 9-14. Oslo. ISSN 0300-1156. 



5. Ascophyllum growth rate has been shown to 

 be sensitive to water temperature changes, 

 especially increases to ambient temperature. 

 Ascophyllum growth at FN in the 3-unit op- 

 erational period was similar to that seen in 

 the single pre-op growing season for which 

 there is data (1985-86); growth patterns at 

 the control sites have remained consistent 

 throughout the pre-op and operational peri- 

 ods. Under 3-unit operational conditions, 

 the control sites had very similar mortality 

 rates, and the experimental station showed a 

 different, higher rate of mortality than the 

 control stations for both tips and plants. Lo- 

 cal Ascophyllum populations have not been 

 affected by operation of Unit 3 to date. 

 Sampling of control populations will continue 

 to provide information as to whether thermal 

 effects may be seen over a larger area, and 

 as to whether trends seen to date will continue 

 during extended 3-unit operation. 



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