1. Aquatic cryptogams of natural acid springs enriched with heavy metals: the Kootenay Paint Pots, British Columbia

   • J. D. Wehr
   • B. A. Whitton

   OriginalPaper Pages: 97 - 105

2. The effect of temperature on asexual population growth of three species of Naididae (Oligochaeta)

   • G. Lochhead
   • M. A. Learner

   OriginalPaper Pages: 107 - 112

3. Efficiency of modifications in the design and use of submerged funnel traps for sampling Chironomidae (Diptera)

   • David M. Rosenberg
   • Allen P. Wiens

   OriginalPaper Pages: 113 - 118

4. Studies on the life cycle of Lemanea using natural and artificial substrates

   • H. H. Thirb
   • K. Benson-Evans

   OriginalPaper Pages: 119 - 124

5. A comparative study of the sessile, filter-feeding ciliates of several small streams

   • William D. Taylor

   OriginalPaper Pages: 125 - 133

6. Microbiological examination of Lake Erie and Lake Ontario sediments

   • B. J. Dutka
   • K. K. Kwan

   OriginalPaper Pages: 135 - 145

7. Study on growth and biomass of underground organs ofTypha angustata Bory & Chaub

   • K. P. Sharma
   • V. N. Pradhan

   OriginalPaper Pages: 147 - 151

8. Influence of acid precipitation on bacterial populations in lakes

   • S. S. Rao
   • B. J. Dutka

   OriginalPaper Pages: 153 - 157

9. Diatoms in sediment cores in Utah Lake, Utah, U.S.A.

   • Adchara Javakul
   • Judith A. Grimes
   • Samuel R. Rushforth

   OriginalPaper Pages: 159 - 170

10. The selection and ingestion of epilithic algae byNais elinguis (Oligochaeta: Naididae)

    • D. W. Bowker
    • M. T. Wareham
    • M. A. Learner

    OriginalPaper Pages: 171 - 178

11. Sedimentation and resuspension in a New England salt marsh

    • Thomas E. Jordan
    • Ivan Valiela

    OriginalPaper Pages: 179 - 184

12. Fate of organic compounds in mountain streams of the Marmot basin: A process reactor model

    • S. A. Telang
    • G. W. Hodgson

    OriginalPaper Pages: 185 - 191