Nutrient Reduction and Biomanipulation as Tools to Improve Water Quality: The Lake Ringsjön Story

1. Front Matter

   Pages i-xii

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2. Lake Ringsjön: its catchment area, its history and its importance

   • Lars-Anders Hansson, Magnus Enell, Eva Bergman

   Pages 1-7

3. Changes in nutrient load and lake water chemistry in Lake Ringsjön, southern Sweden, from 1966 to 1996

   • Eva Bergman

   Pages 9-18

4. Internal phosphorus loading in Lake Ringsjön

   • Wilhelm Granéli

   Pages 19-26

5. Qualitative and quantitative investigations of phytoplankton in Lake Ringsjön, Scania, Sweden

   • Gertrud Cronberg

   Pages 27-40

6. Autumn waterfowl abundance in Lake Ringsjön, 1968–1996

   • Gunnar Andersson, Leif Nilsson

   Pages 41-51

7. Biomanipulation in a theoretical and historical perspective

   • Eva Bergman, Lars-Anders Hansson, Gunnar Andersson

   Pages 53-58

8. Planning and execution of the fish reduction in Lake Ringsjön

   • Stellan F. Hamrin

   Pages 59-63

9. The effects of cyprinid reduction on the fish community

   • Eva Bergman, Stellan F. Hamrin, Pia Romare

   Pages 65-75

10. Lack of a top-down effect on the zooplankton community after a cyprinid reduction

    • Eva Bergman, Eva Bergstrand

    Pages 77-87

11. Juvenile fish expansion following biomanipulation and its effect on zooplankton

    • Pia Romare, Eva Bergman

    Pages 89-97

12. Impact of cyprinid reduction on the benthic macroinvertebrate community and implications for increased nitrogen retention

    • Jonas M. Svensson, Eva Bergman, Gunnar Andersson

    Pages 99-112

13. The development of submerged macrophytes in Lake Ringsjön after biomanipulation

    • John A. Strand

    Pages 113-121

14. The occurrence of toxic blue-green algae in Lake Ringsjön, southern Sweden, despite nutrient reduction and fish biomanipulation

    • Gertrud Cronberg, Heléne Annadotter, Linda A. Lawton

    Pages 123-129

15. Simulating the effects of biomanipulation on the food web of Lake Ringsjön

    • Anders Persson, Andreas Barkman, Lars-Anders Hansson

    Pages 131-144

16. Synthesis of theoretical and empirical experiences from nutrient and cyprinid reductions in Lake Ringsjön

    • E. Bergman, L.-A. Hansson, A. Persson, J. Strand, P. Romare, M. Enell et al.

    Pages 145-156

This book tells a story of a large lake affected by agricultural and urban activities that have led to severe eutrophication problems with nuisance blue-green algal blooms. Although it is a case study of Lake Ringsjön (southern Sweden), the background, problems and measures are applicable to many lakes throughout the world. From a limnological point of view, the Lake Ringsjön story began more than 100 years ago, and during the last 20 years the sampling program has been intense, providing a unique data set on how a lake responds to human activities. However, the Lake Ringsjön story is not only a case study, but also a historical record of the development of ecological theory and its application. Hence, the lake has been subject both to an extensive nutrient reduction programme and a biomanipulation by means of fish reduction. Here we aim at combining the unique limnological data set with the eutrophication process, the nutrient reduction programme and the biomanipulation in order to apply our empirical knowledge to future lake management measures.

• Eutrophication
• Phosphor
• Plankton
• benthic
• blue-green algae
• catchment area
• cyprinid reduction
• fish expansion
• increased nitrogen retention
• juvenile fish expansion
• lake water
• macroinvertebrate
• macrophytes
• nutrient load
• submerged macrophytes
• hydrogeology

• Lund, Sweden

  Lars-Anders Hansson

• Karlstad, Sweden

  Eva Bergman

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