1. Competition between heterotrophic and autotrophic microplankton for dissolved nutrients

   • Edward J. Brown
   • Don K. Button
   • Douglas S. Lang

   OriginalPaper Pages: 199 - 206

2. Effects of random motility on growth of bacterial populations

   • Douglas Lauffenburger
   • Rutherford Aris
   • Kenneth H. Keller

   OriginalPaper Pages: 207 - 227

3. Measurement of the microbial biomass in intact cores of soil

   • J. M. Lynch
   • Lynda M. Panting

   OriginalPaper Pages: 229 - 234

4. Characteristics of the heterotrophic bacterial populations in hypersaline environments of different salt concentrations

   • F. Rodriguez-Valera
   • F. Ruiz-Berraquero
   • A. Ramos-Cormenzana

   OriginalPaper Pages: 235 - 243

5. Contribution of periphytic bacteria to the concentration of chromium in the crabHelice crassa

   • I. Johnson
   • N. Flower
   • M. W. Loutit

   OriginalPaper Pages: 245 - 252

6. Ecology of bacterial communities in the schistosomiasis vector snailBiomphalaria glabrata

   • H. W. Ducklow
   • Kristin Clausen
   • Ralph Mitchell

   OriginalPaper Pages: 253 - 274

7. Ecological study of twoNitrobacter serotypes coexisting in the same soil

   • A. Josserand
   • G. Gay
   • G. Faurie

   OriginalPaper Pages: 275 - 280

8. Book review

   • H. W. Ducklow

   BookReview Pages: 281 - 282