Urban Green Areas: History, Concepts and Ecological Importance

The constant changes in the landscape caused mainly by the urban expansion process, have led to the destruction, fragmentation and isolation of natural habitats, with consequent damage to biodiversity. Recognized as potential "refuges" for biodiversity, urban areas have received great attention to the conservation of animals in addition to exercising functions of aesthetic and recreational. In this context, urban vegetation receives different nomenclatures are used interchangeably as synonyms, when in reality, in many cases, are not. In order to highlight the importance of these areas, this paper then seeks to present definitions of "Urban Fragment", "Green Areas" and "Remaining Fragment" in addition to performing a detailed comparative analysis of studies from an urban green area of the city Juiz de Fora, Minas Gerais, Brazil with work in protected areas.