Urbanization causes a great change in the landscape and thus in fauna communities. However, cities harbour different types of "green spaces", such as gardens, that can ameliorate this impact. These gardens are very heterogeneous, and promote the presence of native, but also non-native anthropophilous species. The factors affecting arthropod species composition, diversity, etc. in these environments have been sparsely studied, and very little is known about their soil fauna communities. The aim of this project is study which factors determine the richness and composition of the soil fauna in urban gardens, how similar are the communities of the urban gardens and the natural surroundings, and if there is a particular type of gardening most suitable for enhancing wild soil fauna.