1. Preface

   • Gerard van der Velde
   • Theo C. M. Brock

   EditorialNotes Pages: i - i

2. Cornelis den hartog: An outstanding aquatic ecologist

   • G. Van Der Velde
   • T. C. M. Brock
   • A. J. Kempers

   OriginalPaper Pages: 71 - 82

3. Species and ecads of Caulerpa (Ulvophyceae, Chlorophyta) in Malesia (South-East Asia): Taxonomy, biogeography and biodiversity

   • W. F. Prud'Homme Van Reine
   • E. Verheij
   • E. Coppejans

   OriginalPaper Pages: 83 - 98

4. How subtidal were the ’subtidal beds’ ofZostera marina L. before the occurrence of the wasting disease in the early 1930's?

   • Victor N. De Jonge
   • Johan F. Ruiter

   OriginalPaper Pages: 99 - 106

5. Twentyfive years of changes in the distribution and biomass of eelgrass,Zostera marina, in Grevelingen lagoon, The Netherlands

   • P. H. Nienhuis
   • B. H. H. De Bree
   • E. G. J. Wessel

   OriginalPaper Pages: 107 - 117

6. Tidal exchange of macrolitter between a mangrove forest and adjacent seagrass beds (Gazi Bay, Kenya)

   • F. J. Slim
   • M. A. Hemminga
   • G. Van Der Velde

   OriginalPaper Pages: 119 - 128

7. Biodiversity in the Lower Rhine and Meuse river-floodplains: Its significance for ecological river management

   • F. W. B. Van Den Brink
   • G. Van Der Velde
   • A. G. Klink

   OriginalPaper Pages: 129 - 149

8. Aquatic macroinvertebrate community structure of aNymphoides peltata-dominated and macrophyte-free site in an oxbow lake

   • Theo C. M. Brock
   • Gerard Van Der Velde

   OriginalPaper Pages: 151 - 163

9. Impact of hydrodynamic changes on the zonation of helophytes

   • Hugo Coops
   • Gerard Van Der Velde

   OriginalPaper Pages: 165 - 173

10. The water mites (Acari: Hydrachnidia) of streams in The Netherlands: Distribution and ecological aspects on a regional scale

    • H. Van Der Hammen
    • H. Smit

    OriginalPaper Pages: 175 - 185

11. Effects of temperature, salinity and agitation on byssus thread formation of zebra musselDreissena polymorpha

    • S. Rajagopal
    • G. Van Der Velde
    • A. J. Kempers

    OriginalPaper Pages: 187 - 195

12. Restoration of eutrophied shallow softwater lakes based upon carbon and phosphorus limitation

    • Jan G. M. Roelofs

    OriginalPaper Pages: 197 - 202

13. Partial recovery of moorland pools from acidification: Indications by chemistry and diatoms

    • Herman Van Dam

    OriginalPaper Pages: 203 - 218

14. The trophic state of shallow lakes in The Netherlands

    • R. M. M. Roijackers
    • A. M. T. Joosten

    OriginalPaper Pages: 219 - 226

15. Changes in plant biomass in fens in the vechtplassen area, as related to nutrient enrichment

    • J. T. A. Verhoeven
    • B. Beltman
    • H. De Caluwe

    OriginalPaper Pages: 227 - 237

16. Ingvar Kristensen (1918–1996)

    • S. Parma

    Announcement Pages: 239 - 239