Page 



16 Isotherms in Safe Harbor Channel May 14, 19 71 



from 1005 to 1010 hours. 55 



17 Movement of 25 °C isotherm in Safe Harbor Channel 

 March 12, 1970 from 1220 to 1730 hours. 56 



18 Movement of 29°C isotherm in Safe Harbor Channel 



May 14, 1971 from 0900 to 1900 hours. 57 



19 Monthly average copper concentrations at all 

 stations. 63 



20 Distribution of copper (ppm dry sediment) in 



upper centimeter of sediment in Safe Harbor. 66 



21 Age of sediment layers in core samples 67 



22 Copper and nickel concentrations in the sediment 



at Bay 2 from 1952 to present. 68 



23 Copper and nickel concentrations in the sediment 



at Station 3 from 1950 to present. 69 



24 Species diversity in foraminifera population 



from core sample at Station 3 and at Bay 2. 73 



25 Numbers of foraminifera per cc of dry sediment 



from core samples at Station 3 and at Bay 2. 74 



26 Monthly percent effluent at each station in 



Safe Harbor from August, 1970 to August, 1971. 78 



27 Mean percent effluent with 90 percent confidence 

 limits of the mean for all deeper stations in 



Safe Harbor from August, 19 70 to October, 19 71. 79 



28 Dominance diversity indices for all Safe Harbor 

 stations based on collections accumulated from 



July, 1970 to October, 1971. 85 



29 Two largest similarity indices for each station 



in Safe Harbor, indicating affinities in population 

 structures from July, 1970 to October, 1971. 87 



30 Similarities in population structure between 

 shallow stations in Safe Harbor from July, 19 70 



to October, 1971. 88 



31 Similarities in population structure between deep 

 stations in Safe Harbor from July, 19 70 to October, 



19 71. 89 



IX 



