1. Nitrogen fixation by Nodularia spumigena Mertens (Cyanobacteriaceae). 2: Laboratory studies

   • A. L. Huber

   OriginalPaper Pages: 193 - 202

2. The determination of fresh organic carbon weight from formaldehyde preserved macrofaunal samples

   • Jeffrey B. Frithsen
   • David T. Rudnick
   • Peter H. Doering

   OriginalPaper Pages: 203 - 208

3. Presence of sculpins (Cottus gobio) reduces drift and activity of Gammarus pulex (Amphipoda)

   • K. G. Andersson
   • C. Brönmark
   • P. Sjörström

   OriginalPaper Pages: 209 - 215

4. Alteration of phytoplankton phosphorus status during enrichment experiments: implications for interpreting nutrient enrichment bioassay results

   • James J. Elser
   • Bruce L. Kimmel

   OriginalPaper Pages: 217 - 222

5. The effect of afforestation on fresh waters in Tayside, Scotland. Zooplankton and other microfauna

   • D. H. Jones

   OriginalPaper Pages: 223 - 235

6. Use of artificial substrates for standardized sampling of macroinvertebrates in the assessment of water quality by the Belgian Biotic Index

   • Niels De Pauw
   • Dirk Roels
   • A. Paulo Fontoura

   OriginalPaper Pages: 237 - 258

7. Variations mensuelles de la structure de communautés benthiques littorales d'eau douce en climat froid

   • B. Vincent

   OriginalPaper Pages: 259 - 270

8. A simple trickle chamber for rearing aquatic invertebrates

   • Anders Hargeby

   OriginalPaper Pages: 271 - 274

9. A simple pressure filtration apparatus for field use

   • Klaus Koop

   OriginalPaper Pages: 275 - 276

10. Population dynamics of Daphnia magna as modified by chronic bromide stress

    • C. J. van Leeuwen
    • M. Rijkeboer
    • G. Niebeek

    OriginalPaper Pages: 277 - 285