All stations in the effluent (i.e. the "B" series of stations) with 

 the exception of 9B and the control station lOB, were similar. The 

 quadrats were on rock outcroppings covered with a thick layer of 

 serpulids (H. dirampha and H. novvegica) . A few bryozoans (Buguta sp.) 

 occurred at most stations in the summer of 1970 (AB had none), and 

 occasionally sabellids settled on the rocks. Siltation was heavy in 

 these quadrats and Station 6B, directly across from the discharge, 

 completely silted over in December, 1970 killing everything in the 

 quadrat. 



There was a marked difference between the faunas in the "A" and "B" 

 series quadrats throughout the Safe Harbor area during 1970. In 

 1971, however, deteriorating conditions at Stations 2A, 3A, 5A, and 

 6A caused these to resemble the lower stations (Fig. 29, Table VI). 

 Station 7B (in the turning basin) showed many faunistic similarities 

 with B stations inside the harbor, including a good serpulid fauna, 

 a few bryozoans and ascidians, and little algae. The abundance of 

 dead Chama and Acra shells attached to the wall also resembled the 

 lower portions of the wall in the harbor. Station 7A, only about ten 

 feet above 7B, was markedly different from 7B and the other stations 

 in the harbor (Fig. 20). There were few serpulids or sabellids, 

 good algal growth (predominantly Halimeda sp.), an occasional lobster 

 (Panutirus argus) , colonial tunicates, three genera of lamellibranches 

 (Lima soabra, Chama floridana, and Acra imbricata) , coral colonies 

 (Siderastrea radians), shrimp (Stenopus hispidus) , an anemone (Bar- 

 tholomea annulata) , and from two to five specimens of A. nigra (Table 

 V) . In December, 1970 the Aara imbricata died and the Chama flori- 

 dana were not present in February, 1971. The Halimeda was in poor 

 condition in February, 1971 and dead by April, 1971. 



Station 8, in the approach channel to the turning basin, bore almost 

 no similarity with Safe Harbor stations (Fig. 29, Table VI). The 

 Station 8 quadrat had numerous gorgonian colonies, many specimens 

 of Acra imbricata and Chama floridana and coral colonies (Table V). 

 Absence of A. nigra, serpulids, and other 'harbor' organisms indicated 

 this area was not frequently exposed to effluent water. 



The control station, about one mile from Safe Harbor stations (Fig. 3) 

 had a prolific fauna and flora similar to that recorded from Safe 

 Harbor in the Phase I investigation. The two stations (lOA and lOB) 

 were placed on a vertical rock face, thirty feet (9m) high. Like the 

 Safe Harbor counterpart, siltation was rapid and water circulation 

 slight. The thirty foot (9m) deep basin which adjoined undeveloped 

 U.S. Naval property (and received no effluents) was separated from 

 Boca Chica Channel by a sixteen foot (5m) deep ridge. It was, there- 

 fore, physically quite similar to the Safe Harbor area. Station lOA 

 had an average of 19.8 Asoidia nigra per square meter from November, 

 1970 until October, 1971. Three species of green algae made up the 

 majority of the algal population which covered about twenty percent 

 of the quadrat. There were relatively few serpulids or sabellids, 



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