Ecosystem diversity deals with the variations in ecosystems within a geographical location and its overall impact on human existence and the environment. Ecosystem diversity is a type of biodiversity. It is the variation in the ecosystems found in a region or the variation in ecosystems over the whole planet, Biodiversity is defined as “the variability among living organisms from all sources including, inter alia, terrestrial, marine and other aquatic ecosystems and the ecological complexes of which they are part; this includes diversity within species, between species and of ecosystems.” The importance of this definition Those ecosystem services have provisioning (such as food and water), regulating (as flood control), cultural (such as for recreation) and supportive characters (like nutrient cycles). Healthy ecosystems and a rich biodiversity, i.e. the multiplicity of living organisms and ecosystems, are vital for cities to function properly. Not only do ecosystem services provide urban residents with food and clean water, they also play an important role for the quality of life in a city: ecosystem services regulate a city's climate, filter emissions and can protect a city against flooding. Despite the importance of a healthy ecosystem, little is done to mitigate the negative impact that by factors including over-exploitation, climate change, land use change, urban sprawl, traffic, air pollution and invasive species have on it.