Why biotope mapping in populated areas?

The title ‘why biotope mapping in populated areas?’ is chosen because that is the main question local authorities and other people ask when money should be spent for biotope mapping in towns and cities. In order to answer this question two approaches are used, a theoretical approach, and a practical approach based on experiences in Germany. The theoretical approach is in line with a programme published by a German working group in 1993 and stresses the concept of an integrated nature conservation strategy. In addition, issues are presented such as ecological functions of biotopes, different kinds of nature, and the relationship between man and nature. The practical approach describes that around 200 towns and cities in Germany have carried out urban biotope mappings, and explains the integration of biotope mapping in the planning system. The results of a mail survey are recorded concerning purpose and use of biotope mapping in populated areas. Biotope mapping has proved an important tool for nature conservation strategies because it offers a realistic and comprehensive view of urban nature. It has become an indispensable component of landscape planning and the survey verified that the results of urban biotope mapping are used manifold by local administrations.