Backyards are strategic to the increment of green areas in neighborhoods where there is scarce vegetation RUDD et al, It is not merely an aesthetic matter: several studies have correlated abundantly vegetated neighborhoods with the lower incidence of different types of diseases such as the respiratory ones TZOULAS et al, Weller and Jenerette have studied the relation among vegetation cover, housing density and income in the Metropolitan Region of Los Angeles and found that lower-income neighborhoods have more waterproofed soil and fewer trees. Richer neighborhoods, on the other hand, are positively correlated with wooded dwellings, as well as with the presence of green areas.
It is worth highlighting that species introduction programs should be preceded by sociological investigations in order to identify the ways the native vegetation - generally less known than the exotic species - may be accepted and incorporated into the backyards. Brazilian backyards comprise hundreds of hectares in the cities. They are spaces available to receive vegetation able to provide greater food security and quality of life to the citizens.
In addition, they can also sustain biological diversity and even ex-situ conservation by harboring endangered species such as Araucaria angustifolia , which is critically endangered and whose seeds are highly prized in the culinary of Southern Brazil. However, backyards are invisible to municipal authorities despite their potential. As it was shown in the present study, their planting potential is high - it would be possible planting approximately 2, trees in the backyards of the neighborhood.
The Grass is Always Greener
On the other hand, the planting potential in Zona 02 is even higher - approximately 12, trees could be introduced in its backyards. Obviously, the backyard planting potential will never be totally used for several reasons. In the backyards of impoverished neighbors, for example, there is competition between very different uses such as increasing the built-up area of the dwellings. However, the results in the current study have shown that backyards are strategic places to increase the vegetation cover in cities and, by extension, to increase their ecosystem services.
Thus, the successful planning of backyards will only be possible through previous studies able to help understanding the environmental, cultural and socioeconomic factors influencing these backyards' configuration. Therefore, the methodology used in the current study to compare neighborhoods could be periodically used to assess the biocultural, social, economic and structural conditions influencing these habitats on a metropolitan scale. In Dourado, S. Maringa, Brasil. Bhatti, M. Sociological Review , Impact of predation by domestic cats Felis catus in an urban area.
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