User:Gopherfrog47/Urban prairie

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The definition of an "urban grassland" can vary across countries and disciplines, but at it's broadest encompasses meadows, lawns, and gardens, as well as public and private parks, vacant land, remnants of rural landscapes, and areas along transportation corridors. Urban brownfields are contaminated grasslands that also fall under the urban grassland umbrella. Urban greenspaces are a larger category that include urban grasslands in addition to other spaces.

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Urban grasslands can result from several factors. They can either being land that was previously developed and has since been cleared, or remnants of the natural landscape. In the first case, they may be caused by the value of aging buildings falling too low to provide financial incentives for their owners to maintain them or seizure by local government as a response to unpaid property taxes. In many cases, cities demolish vacant structures because they pose health and safety threats (such as fire hazards), or be used as a location for criminal activity. Areas may also be cleared as part of revitalization plans with the intention of redeveloping the land. In flood-prone areas, government agencies may purchase developed lots and then demolish the structures to improve drainage during floods. Some neighborhoods near major industrial or environmental clean-up sites are acquired and leveled to create a buffer zone and minimize the risks associated with pollution or industrial accidents. Such areas may become nothing more than fields of overgrown vegetation, which then provide habitat for wildlife. Sometimes it is possible for residents of the city to fill up the unplanned empty space with urban parks or community gardens. Urban prairie is sometimes planned by the government or non-profit groups for community gardens and conservation, to restore or reintroduce a wildlife habitat, help the environment, and educate people about the prairie.

Many studies show urbanization has been linked to a loss of biodiversity. Additionally, remaining urban landscapes are typically unable to support the complex food webs the previously hosted and become novel habitats home to highly adapted alien species, such as rats, cockroaches, and pigeons. As natural landscapes are replaced with urban ones, the ecosystem services of the area can be diminished. Due to this, in urban areas green spaces and grasslands are even more vital. These areas not only better human life through providing space for leisure activities, and social interaction, but also direct health benefits such as reducing air pollution. They also provide homes for important pollinators such as wild bees. Despite the issues surrounding their cleanup and maintenance, even small urban grasslands can have a big effect ecologically. In Melbourne, Australia at the Tunnerminnerwait and Maulboyheenner memorial site just three years after being replanted with a variety of native species and receiving upkeep, the green space had increased the number and diversity of insects in the vicinity.