Annual totals at JC were similar to or above the highest species totals 

 recorded at this station In recent years. 



Seasonal IncrGases in species numbers occurred at all stations 

 reflecting additions to the species pool. At all stations, annual curves 

 were gently sloped, illustrating the major contribution the September 

 collection in determining the annual totals. The GN community exhibited 

 the largest seasonal increase over the four sampling periods, while that of 

 JC exhibited the smallest. In 1983, and in nearly all other years, a 

 complement of winter (December) and early summer (June) species occurred 

 while few if any, additional species were collected in March. 



Cluster Analysis 



Cluster analysis was performed on the intertidal data collected in 

 each of the last four years to illustrate station similarity in community 

 composition and abundance. The analysis separated the three intertidal 

 stations into two major groups, one containing all JC years (Group I) and 

 one containing GN and WP years (Group II) (Fig. 8) . These groups linked at 



■25 



7 



50 



60 



70- 



O 80- 



90 



f 



"c "c '^C "O <?(, <?j, ^V % ^ '^ 'J* ^ 



% \ \ ** % \ % \ \ \ \ 



Figure 8. Dcrnlrogram resulting from classification of annual rollcctions at 

 Millstone intertidal stations, Septomber 1971 - Juni- 14S!. 



24 



