showed two periods of declining populations; from October, 196A to 

 June, 1966 and from November, 1967 until January, 1970. From January, 

 1970 to October, 19 71 conditions steadily improved. Numbers of 

 Foraminifera increased from 218 per cc of dry sediment in September, 

 1970 to 621 in February, 1971; higher than present in all other strata 

 at Station 3. It is evident, therefore, that the high levels of 

 copper and nickel had little effect on the f oraminiferan populations 

 except in the immediate vicinity of the discharge (see Section VIII 

 BIOLOGICAL PARAMETERS - Foraminifera below) . 



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