6-6 



NAI Program 



The NAI sampling program was a continuation of a baseline 

 study initiated under NAI direction by the Raytheon Company in 1970. 

 The present methodology was standardized in 1973, and data collected 

 prior to 1973 are not considered in this report, except as a quali- 

 tative reference. 



2 

 Sampling was done with a 0.053 m Ponar grab sampler (recov- 



3 

 erable volume = 7450 cm ) . Five replicate samples were collected at 



each of three stations (5, 8 and 13) during 1973 and 1974 and six 



stations (3, 5, 6, 8, 11, 13) from 1975 through 1977. As some of the 



stations bear the same n\americal designation as some R & M stations, all 



NAI stations will hereafter be designated with an "N" suffix in all 



text, tables and figures. Samples were sieved through a 1.0 mm mesh 



sieve, and preserved in a 5% formalin solution in the field. 



NAI stations were designated as either inner harbor (3N, 5N, 

 5N) , shipping channel (8N, UN) or outer harbor (13N) . The inner harbor 

 NAI stations are generally in shallower areas more distant from the 

 power station than are the R & M stations. Stations 8N and UN are not 

 directly comparable with any of the R & M stations, while Station 13N is 

 spatially contiguous with the Morris Cove control stations. 



Data Analysis 



Data analyses included calculation of information-theory 



diversity indices (Shannon-Weaver, H' ; Brillouin, H) and related values 



(J' , H' , H' . ) . These indices were calculated separately for each 

 max min 



replicate. Data processing was done at the Woods Hole Oceanographic 

 Institution (WHOI) computing facility. The Shannon-Weaver formula is 

 expressed by: 



