Page 



Nutrients (Ammonia-nitrogen, Nitrate-nitro- 

 gen, Nitrite-nitrogen, and Total 



Phosphorus) 136 



Heavy Metals and Pesticides 137 



Illinois River 138 



Sediment l 4i 



Terrestrial Communities 151 



Waterfowl 151 



Bald Eagle 161 



Herons and Their Allies 161 



Cormorants 166 



Shorebirds and Related Species 168 



Other Game Species 171 



Other Avifauna 171 



Muskrat 172 



Beaver 174 



Raccoon 177 



Mink 182 



Other Furbearers 183 



White-Tailed Deer I 83 



Squirrels I 85 

 Rabbits 



187 



PART IV: SUMMARY 188 



LITERATURE CITED 197 



APPENDIX: Table 56 210 



iii 



