1. Potential toxicity of the freshwater Chrysochromulina species C. parva (Prymnesiophyceae)

   • Lone Reersø Hansen
   • Jørgen Kristiansen
   • Jørn Vistisen Rasmussen

   OriginalPaper Pages: 157 - 159

2. Molluscan cellulolytic activity responses to zinc exposure in laboratory and field stream comparisons

   • J. L. Farris
   • J. L. Grudzien
   • J. Cairns Jr.

   OriginalPaper Pages: 161 - 178

3. Bioavailability of phosphorus in agriculturally loaded rivers in southern Finland

   • Petri Ekholm

   OriginalPaper Pages: 179 - 194

4. Metazoans from a sandy aquifer: dynamics across a physically and chemically heterogeneous groundwater system

   • Christine C. Hakenkamp
   • Margaret A. Palmer
   • Bruce R. James

   OriginalPaper Pages: 195 - 206

5. Effect of food type and concentration on the survival, longevity, and reproduction of Daphnia magna

   • Fernando Martínez-Jerónimo
   • Rafael Villaseñor
   • Félix Espinosa

   OriginalPaper Pages: 207 - 214

6. Gut morphology, feeding rate and gut clearance in five species of caddis larvae

   • Namuron Sangpradub
   • Paul S. Giller

   OriginalPaper Pages: 215 - 223

7. Announcement

   Announcement Pages: i - ii