Biological Indicators of Freshwater Pollution and Environmental Management

1. Front Matter

   Pages i-xiii

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2. Water and Man

   • J. M. Hellawell

   Pages 1-9

3. Freshwater Ecosystems

   • J. M. Hellawell

   Pages 10-44

4. Biological Indicators

   • J. M. Hellawell

   Pages 45-77

5. Environmental Stress

   • J. M. Hellawell

   Pages 78-98

6. Effects of Physical Disturbances

   • J. M. Hellawell

   Pages 99-154

7. The Effects of Organic Enrichment

   • J. M. Hellawell

   Pages 155-211

8. Effects of Toxic Materials

   • J. M. Hellawell

   Pages 212-328

9. Laboratory Evaluation of Pollutants

   • J. M. Hellawell

   Pages 329-397

10. Field Assessments of Environmental Quality

    • J. M. Hellawell

    Pages 398-434

11. Biological Surveillance in Environmental Management

    • J. M. Hellawell

    Pages 435-446

12. Back Matter

    Pages 447-546

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The preface of a book often provides a convenient place in which the author can tender his apologies for any inadequacies and affords him the facility to excuse himself by reminding the reader that his art is long but life, or at least the portion of it in which he has the opportunity for writing books, is short. I, too, am deeply conscious that I have undertaken a task which I could not hope to complete to my own satisfaction but I offer, in self­ defence, the observation that, inadequate though it is, there is no other book extant, so far as I am aware, which provides the information contained herein within the covers of a single volume. Often during the last decade, in discharging my responsibilities for the environmental aspects of the water authority's operations and works, I should have been deeply grateful to have had access to a compendium such as this. The lack of a convenient source of data made me aware of the need which I have attempted to fill and in doing so I have drawn on my experiences of the kinds of problem which are presented to biologists in the water industry. The maxim 'half a loaf is better than none' seems particularly apt in this context.

• environmental management
• water pollution

• Nature Conservancy Council, Peterborough, UK

  J. M. Hellawell

• Environmental Aspects, Severn-Trent Water Authority, Birmingham, UK

  J. M. Hellawell

Policies and ethics