GZyceva sp., but not as strongly as the other variables (0.3758). The 

 factor includes organisms that burrow through the fine, leptokurtotic 

 sands of the deepwater sites. 



(e) Factor 5 . The factor loaded heavily with the deposit- 

 feeding polychaete, S. squamata, Donax sp., and the carnivorous poly- 

 chaete, Eteone heteropodcL. These animals were characteristic of deep- 

 water sites, but sometimes moved shoreward and were found in low 

 numbers on all sites. 



g. Species Diversity . Species diversity for each sample was 

 calculated, using the Shannon-Weaver index: 



s 

 H' = - E (Ni/N) log2 (Ni/N) , 

 1 



where N^ is the number of individuals per taxon, N is the total 

 number of organisms, and s is the number of taxa. The species 

 diversity was calculated for each site [Table 29] . A three-way 

 analysis of variance was performed on these data with site, transect, 

 and season as the independent variables. 



The two-way interaction terms were significant, but the three-way 

 interaction term was not significant. There was no significant 

 difference in diversity between transects. There was a highly signif- 

 icant difference between both sites and seasons. Diversity was 

 lowest during October and increased during March, June, and July. 

 Diversities in October ranged from to 1.27 and in July from 0.29 to 

 1.80. The deep sites had the highest diversities with the highest 

 diversity (1.85) occurring on transect III, site 9 in June 1976. 



2 . The Sound Beach . 



a. Preliminary Sampling . Samples taken during 26 and 27 July 1975 

 are not comparable to the other four sets of samples because different 

 extraction techniques were used, and will not be discussed here (see 

 App. D). 



b. Faunistics . Twenty- three species of macrofauna in four phyla 

 and 23 families were collected (Table 30). The phylum Arthropoda 

 dominated the macrofauna with 14 families and at least 14 species. The 

 phylum Annellida, represented by five species, was most numerous. 

 Larval Diptera were not identified below the family level; several 

 species may have been represented, particularly in the family 

 Chironomidae. 



c. Species Abundance. The mean number of individuals per square 

 meter was calculated for each site and season for the total fauna, and 



53 



