Many of the urban areas managed by the biotope team are located in outlying areas. Some of these areas are in nature reserves and therefore require careful management in line with nature conservation principles and specialist knowledge of species. Maintenance covers many areas of responsibility and is based on ecological considerations. It includes measures that specifically promote flora and fauna. These include mowing requirements, such as setting mowing times and preserving old grass stocks in order to maintain and protect habitats for plants and animals. In addition, the identification and control of neophytes on these areas is a recurring issue.