1. Editorial

   • P. Perret

   EditorialNotes Pages: 1 - 3

2. Dating of sediments from Lake Zurich (Switzerland) with²¹⁰Pb and¹³⁷Cs

   • H. N. Erten
   • H. R. von Gunten
   • M. Sturm

   OriginalPaper Pages: 5 - 11

3. Contamination des sédiments superficiels des principales rivières du Canton de Genève par les Polychlorobiphényles et DDT

   • Par Cl. Corvi
   • J. Vogel

   OriginalPaper Pages: 12 - 20

4. Light-induced conversion of refractory, high molecular weight lake water constituents

   • Annette Geller

   OriginalPaper Pages: 21 - 26

5. Degradation and formation of refractory DOM by bacteria during simultaneous growth on labile substrates and persistent lake water constituents

   • Annette Geller

   OriginalPaper Pages: 27 - 44

6. Dynamics of hydra populations in Lake Zürich, Switzerland, and Lake Maggiore, Italy

   • G. Ribi
   • R. Tardent
   • C. Scascighini

   OriginalPaper Pages: 45 - 56

7. Seasonal changes of the profundal macrobenthic community in a polluted lake

   • Marcello Bazzanti
   • Marco Seminara

   OriginalPaper Pages: 57 - 63

8. La végétation macrophytique d'un lac hautement eutrophe du Plateau suisse: Le Baldegger See

   • Raphaëlle Juge
   • Brigitte Lods-Crozet
   • Jean-Bernard Lachavanne

   OriginalPaper Pages: 64 - 75

9. Premier complément à l'inventaire de la biocénose planctonique du lac Léman

   • G. Balvay
   • J. C. Druart
   • M. Laurent

   OriginalPaper Pages: 76 - 80

10. An improved Kajak-type gravity core sampler for soft bottom sediments

    • Sven Blomqvist
    • Berndt Abrahamsson

    OriginalPaper Pages: 81 - 84

11. Bücher/der Redaktion angekündigte Neuerscheinungen

    BookReview Pages: 85 - 86

12. Symposium über Meeresforschung in der Schweiz

    Ankündigung Pages: 86 - 86