Studies on Lake Vechten and Tjeukemeer, The Netherlands

1. Front Matter

   Pages I-VIII

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2. The twenty-fifth anniversary of the Limnological Institute, The Netherlands (1957–1982)

   1. The twenty-fifth anniversary of the Limnological Institute, The Netherlands (1957–1982)

      • S. Parma

      Pages 1-9

3. Lake Vechten

   1. Lake Vechten: aspects of its morphometry, climate, hydrology and physico-chemical characteristics

      • C. L. M. Steenbergen, H. Verdouw

      Pages 11-23

   2. The phytoplankton species composition and the seasonal periodicity in Lake Vechten from 1956 to 1979

      • Marianne C. I. Blaauboer

      Pages 25-36

   3. The primary production of phytoplankton in Lake Vechten

      • W. A. de Kloet

      Pages 37-57

   4. Contribution of photosynthetic sulphur bacteria to primary production in Lake Vechten

      • C. L. M. Steenbergen

      Pages 59-64

   5. The aquatic macrophytes of Lake Vechten. Species composition, spatial distribution and production

      • Elly P. H. Best

      Pages 65-77

   6. Structural and functional characteristics of epiphyton and epipelon in relation to their distribution in Lake Vechten

      • Herman J. Gons

      Pages 79-114

   7. Macro-invertebrate communities associated with the macrophytes of Lake Vechten: structural and functional relationships

      • Jan Dvořak, Elly P. H. Best

      Pages 115-126

   8. The zooplankton: its community structure, food and feeding, and role in the ecosystem of Lake Vechten

      • R. D. Gulati, K. Siewertsen, G. Postema

      Pages 127-163

   9. Sedimentation and breakdown kinetics of organic matter in the anaerobic zone of Lake Vechten

      • Th. E. Cappenberg, H. Verdouw

      Pages 165-179

   10. Aspects of aerobic mineralization during spring in Lake Vechten with special reference to the 14C-labelling technique

       • J. J. Olie, Th. E. Cappenberg

       Pages 181-190

   11. Nitrogen cycle of Lake Vechten: concentration patterns and internal mass-balance

       • H. Verdouw, E. M. J. Dekkers

       Pages 191-197

4. Tjeukemeer

   1. Hydrology of Tjeukemeer

      • J. D. Leenen

      Pages 199-203

   2. Physico-chemical environment in Tjeukemeer with special reference to speciation of algal nutrients

      • H. De Haan

      Pages 205-221

   3. The algal periodicity in Tjeukemeer during 1968–1978

      • J. R. Moed, H. L. Hoogveld

      Pages 223-234

   4. Population dynamics and production of Daphnia hyalina Leydig and Daphnia cucullata Sars in Tjeukemeer

      • J. Vijverberg, A. F. Richter

      Pages 235-259

   5. Population dynamics and production of Acanthocyclops robustus (Sars) and Mesocyclops leuckarti (Claus) in Tjeukemeer

      • J. Vijverberg, A. F. Richter

      Pages 261-274

   6. INSTAR, a discrete event model for simulating zooplankton population dynamics

      • P. Hogeweg, A. F. Richter

      Pages 275-285

   7. Distribution and production of the larval chironomid populations in Tjeukemeer

      • D. M. Beattie

      Pages 287-306

The Netherlands, like the other industrialized countries in the northern hemisphere, is faced with increas­ ing environmental pro blems. Being a country rich in water - at least in terms of surface area - and low-lying, problems related to water are as old as the nation itself. The problems in regard to water quality are becoming more acute and complicated due to the progressive rise in air and ground pollution. Glaring examples are the acid rains and contamination of ground-water resources by toxic, and often illegal, waste dumps. Being a delta country, the Netherlands is also very vulnerable to pollution from the·water sources outside the country's national boundaries, i.e. the rivers Rhine, Meuse and ScheIdt. Not only the national but also the international authorities are active in developing measures to both prevent and combat water pollution, and to restore as far as possible the natural balance or a 'reasonable' water quality. The pollution abatement programmes are based on ecological theories; accepting waterbodies as aquatic ecosystems, the authorities concerned try to influence and lead the progresses in the systems to reach or maintain the desired ecosystem structure. Suter II (1981) mentioned a number of reasons why the attempts to use ecosystem theories to assess the impacts on the environment have been disappointing to date. It is clear that one of the reasons for the failure is lack of proper knowledge.

• ecosystem
• environment
• macrophytes
• phytoplankton
• plankton
• zooplankton

• Nieuwersluis, The Netherlands

  Dr S. Parma

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