1. General introduction to the research in the Maarsseveen Lakes

   • J. Ringelberg

   EditorialNotes Pages: 3 - 4

2. Introduction to the research area

   • J. Ringelberg

   EditorialNotes Pages: 5 - 9

3. Annual and diel oxygen and temperature regime of the Lakes Maarsseveen

   • Kees Kersting

   OriginalPaper Pages: 10 - 28

4. Phytoplankton in Lake Maarsseveen I (1977–1979)

   • Jaap Dorgelo
   • Ilse De Graaf Bierbrauwer

   OriginalPaper Pages: 29 - 40

5. Estimation of the primary production in Lake Maarsseveen I with an incubator technique

   • B. J. G. Flik
   • A. Keyser

   OriginalPaper Pages: 41 - 50

6. Estimation of zooplankton populations in Lake Maarsseveen I: Problems, procedures and results

   • Maureen E. Butter

   OriginalPaper Pages: 51 - 59

7. A diel study in a water column of Lake Maarsseveen I

   • J. Ringelberg

   OriginalPaper Pages: 60 - 71

8. The submerged aquatic macrophytes in Lake Maarsseveen I: Species composition, spatial distribution and productivity

   • Elly P. H. Best

   OriginalPaper Pages: 72 - 81

9. Bottom fauna and littoral vegetation fauna in Lake Maarsseveen

   • L. W. G. Higler

   OriginalPaper Pages: 82 - 86

10. Habitat differentiation and feeding strategies in water mites in Lake Maarsseveen I

    • C. Davids
    • C. F. Heijnis
    • J. E. Weekenstroo

    OriginalPaper Pages: 87 - 91

11. Ostracods (Ostracoda, Crustacea) from two freshwater lakes near Maarssen, The Netherlands

    • R. Sluys

    OriginalPaper Pages: 92 - 93

12. Miscellaneous

    Announcement Pages: 94 - 94

13. Congresses

    • Robert G. Wetzel

    Announcement Pages: 94 - 95