Urban ecology is to city structures as ecological niche is to _____?

Urban ecology studies how plants, animals, and humans interact with the buildings, streets, and parks of a city. An ecological niche is the way a species fits into its natural surroundings, describing its habits, food, and space. Thus, urban ecology is to city structures what ecological niche is to a species. In other words, the niche is the species’ role in its ecosystem, just as city structures are the setting for urban ecology.