1. Heterotrophic bacterial activity and primary production in a hypertrophic African lake

   • Richard D. Robarts

   OriginalPaper Pages: 97 - 107

2. A comparison of periphyton community structural and functional responses to heavy metals

   • Michael J. Crossey
   • Thomas W. La Point

   OriginalPaper Pages: 109 - 121

3. Temporal dynamics and spatial variation of algae in relation to hydrology and sediment characteristics in the Okefenokee Swamp, Georgia

   • Steven A. Schoenberg
   • J. Douglas Oliver

   OriginalPaper Pages: 123 - 133

4. Two new species of Ergasilidae (Copepoda: Poecilostomatoida) parasitic on Mugil cephalus L. from southern Africa

   • W. H. Oldewage
   • J. G. van As

   OriginalPaper Pages: 135 - 139

5. The biological effects of nitrate fertilization and water replacement in an oligotrophic cold water pond

   • Walter K. Dodds
   • Richard W. Castenholz

   OriginalPaper Pages: 141 - 146

6. Zooplankton abundance and transport in a tropical white-water river

   • James F. Saunders III
   • William M. Lewis Jr.

   OriginalPaper Pages: 147 - 155

7. Seasonal variations in the production of antifungal substances by some dictyotales (brown algae) from the french mediterranean coast

   • J. Moreau
   • D. Pesando
   • J. C. Pionnat

   OriginalPaper Pages: 157 - 162

8. Secchi disk — chlorophyll relationships in a lake with highly variable phytoplankton biomass

   • Max M. Tilzer

   OriginalPaper Pages: 163 - 171

9. Niche congruency of aquatic macrophytes in central North America with respect to 5 water chemistry parameters

   • Eva Pip

   OriginalPaper Pages: 173 - 182

10. Correlations between species richness and exposure: Freshwater molluscs and macrophytes

    • Robert C. Bailey

    OriginalPaper Pages: 183 - 191