A summary of tests of site differences with ANOVA and S-N-K performed by Barnett et 

 al. (1987) is listed in Table 21. The site means were calculated as the averages of the means 

 for the five replicates of the three stations at each site. Significant between-site differences 

 were observed with all the selected parameters. Total counts, crustacean abundance and 

 dominance were significantly higher at the SP site than at the others, and, accordingly, 

 evenness and diversity were significantly lower there. Species richness, total biomass, and 

 abundance of polychaetes/oligochaetes were significantly higher at TB than at the other 

 sites. Mollusc abundance was significantly higher at VA and SP than at TB and YB. 



Table 21. Summary of site differences in selected benthic community parameters based 

 upon ANOVA with a S-N-K test on mean or log (x + 1) transformed mean data from the 

 YB, SP, VA, and TB sites. Means connected by the same underline are not significantly 

 different (a >0.008) 



Total count 



site log mean 

 Species richness 



site mean 

 Crustacean abundance 



site log mean 

 Mollusc abundance 



site log mean 

 Polychaete/Oligochaete abundance 



site log mean 

 Total biomass 



site mean 

 Shannon-Wiener diversity index 



site mean 

 Pielou evenness measure 



site mean 

 Dominance index 



site mean 



Sediment Profiling Photography Results 



A variety of measures of the characteristics of sediments was recorded through use of 

 sediment profiling photography and other means at four of the sites (Table 22). No data 

 were produced for the TB site. The overall intent of these measurements was to determine 

 the degree, if any, of organic enrichment of sediments as indicated by the variety of 

 sedimentological and biological measures. 



The sediments were mainly fine-grained (> 4 phi; >95% fines) at three of the four sites; 

 they were more coarse at VA. The indices of biological conditions at the sites (Organism- 

 Sediment Index (OSI) and Infaunal Successional Stage) did not indicate the infauna were 

 stressed or recently disturbed at most of the stations within the sites. Some of the stations 

 at the OA site, however, indicated that recent disturbance or organic enrichment may have 



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