Ever closer links have been forged between caring for nature on the one hand and human activities on the other. In recent years there has been a shift from an interest in reserve-based nature, which excluded man and human activities, to an increasingly powerful nature-culture relationship. Nature protection became nature conservation and then nature development with the integration of socio-economic and cultural aspects. Within the framework of the setting-up of the Pan-European Ecological Network, these sociological aspects have a great importance for establishing an ecological network where the scientific aspects of biodiversity protection must co-exist with nature management and development.