This book gives an interdisciplinary overview on urban ecology. Basic understanding of urban nature development and its social reception are discussed for the European Metropolitan Area of Berlin. Furthermore, we investigate specific consequences for the environment,  nature and the quality of life for city dwellers due to profound changes such as climate change and the demographic and economic developments associated with the phenomena of shrinking cities. Actual problems of urban ecology should be discussed not only in terms of natural dimensions such as  atmosphere, biosphere, pedosphere and hydrosphere but also in terms of social and cultural dimensions such as  urban planning, residence and recreation, traffic and mobility and economic values. Our research findings focus on streets, new urban landscapes, intermediate use of brown fields and the relationships between urban nature and the well-being of city dwellers. Finally, the book provides a contribution to the international discussion on urban ecology.