1. Macroinvertebrate community structure and detritus processing rates in two southwestern Pennsylvania streams acidified by atmospheric deposition

   • William G. Kimmel
   • Deborah J. Murphey
   • David R. DeWalle

   OriginalPaper Pages: 97 - 102

2. Secondary production of introduced Asiatic clam, Corbicula fluminea, in a central Arizona canal

   • Paul C. Marsh

   OriginalPaper Pages: 103 - 110

3. FAO interests in promoting understanding of world seaweed resources, their optimal harvesting, and fishery and ecological interactions

   • John F. Caddy
   • W. A. Fisher

   OriginalPaper Pages: 111 - 121

4. Tasmanomysis oculata n.g. n.sp. from Tasmanian waters (Crustacea: Mysidacea: Mysini)

   • Gwen Elizabeth Fenton

   OriginalPaper Pages: 123 - 127

5. Nitrogen transformations in a small mountain stream

   • Joanna S. Richey
   • William H. McDowell
   • Gene E. Likens

   OriginalPaper Pages: 129 - 139

6. Predation of common invertebrate predators on long- and short-featured Daphnia retrocurva

   • John E. Havel

   OriginalPaper Pages: 141 - 149

7. Development of Lake Kortowskie in relation to the climatic changes in three Holocene periods

   • Izabela Rybak
   • Mariusz Rybak

   OriginalPaper Pages: 151 - 166

8. Studies on ciliated protozoa in eutrophic lakes: 1. Seasonal distribution in relation to thermal stratification and hypolimnetic anoxia

   • A. W. Bark

   OriginalPaper Pages: 167 - 176

9. Studies on ciliated protozoa in eutrophic lakes: 2. Field and laboratory studies on the effects of oxygen and other chemical gradients on ciliate distribution

   • A. W. Bark
   • J. G. Goodfellow

   OriginalPaper Pages: 177 - 188

10. Notes on Algerian aquatic fungi: Pythium pythioides

    • Paul Bernard
    • Beghdadi Abdellatif

    OriginalPaper Pages: 189 - 191