Section Page 



9 The relationship between total phosphorus loading, lake 



morphometry, and lake trophic condition for selected phos- 

 phorus-limited lakes in the Northeastern United States . . 94 



9 The relationship between total phosphorus loading, lake 



morphometry, and lake trophic condition for selected nitro- 

 gen-limited lakes in the Northeastern United States ... 94 



12 Map-diagram of Rybinskiy reservoir 122 



12 Average values for phytoplankton production for 13 years 



in the Rybinskiy reservoir 124 



12 Average values of the number of bacteria according to data 



for 2 years of standard observations 126 



13 Change in component values in time—experiment 1 141 



13 Change in component values in time—experiment 2 142 



13 Change in component values in time—experiment 3 143 



13 Change in component values in time—experiment 4 144 



13 Change in component values in time— experiment 5 145 



13 Change in component values in time— experiment 6 146 



13 Change in component values in time—experiment 7 147 



13 Change in component values in time— experiment 8 148 



13 Change in component values in time— experiment 9 149 



13 Change in component values in time— experiment 10 .... 150 



13 Dependence of the specific growth rate of bacteria on 



the nitrate nitrogen N concentration 151 



14 Block diagram of basic functional links in the reser- 

 voir 154 



14 Change in numbers of a species with exposure to a toxic 



substance 155 



16 Organization of investigational divisions at the Fish- 

 Pesticide Research Laboratory, Columbia, Mo 168 



vi n 



