An Analysis of Urban Development Pressure on the Edge of South Mountain Park in Phoenix, Arizona
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Edges have long been discussed as a topic of interest for research on fauna, but few studies have really focused on edges with a high urban development density. This paper focuses on the edge change of the South Mountain Park, Phoenix, by analyzing different temporal and spatial scales of maps. The analyses were conducted in three steps. The first step was to examine the types and changes of land cover around the edge at the scale 1:100,000 using GIS. The second step was to understand the changes in levels of disturbance in highly disturbed areas identified from the previous step, using aerial photographs. The third step was to investigate disturbance patterns in residential areas, at a larger scale, by measuring the two indicators: native vegetation and impervious cover. The research found that the edge disturbance around the urban preserve is mostly caused by low or very low density residential development, indicating that the zonings around the South Mountain Park are not ecologically sound. The study also found that the low density residential zoning (5.3 residential units/acre) disturbs the native vegetation more significantly than the very low density residential zoning. Finally, the current patterns of disturbance in very low density residential zoning (4.3 residential units/acre) have caused more significant introduction of exotic vegetation than in the low density residential, reflecting unsustainable ecological process in the desert environment. Since few studies have been conducted to understand how different types of land uses affect the edges of mountain parks, it is important to focus on examining characteristics of edge disturbance and understanding how different land use patterns are associated with a particular type of the disturbance.
Abstract
Edges have long been discussed as a topic of interest for research on fauna, but few studies have really focused on edges with a high urban development density. This paper focuses on the edge change of the South Mountain Park, Phoenix, by analyzing different temporal and spatial scales of maps. The analyses were conducted in three steps. The first step was to examine the types and changes of land cover around the edge at the scale 1:100,000 using GIS. The second step was to understand the changes in levels of disturbance in highly disturbed areas identified from the previous step, using aerial photographs. The third step was to investigate disturbance patterns in residential areas, at a larger scale, by measuring the two indicators: native vegetation and impervious cover. The research found that the edge disturbance around the urban preserve is mostly caused by low or very low density residential development, indicating that the zonings around the South Mountain Park are not ecologically sound. The study also found that the low density residential zoning (5.3 residential units/acre) disturbs the native vegetation more significantly than the very low density residential zoning. Finally, the current patterns of disturbance in very low density residential zoning (4.3 residential units/acre) have caused more significant introduction of exotic vegetation than in the low density residential, reflecting unsustainable ecological process in the desert environment. Since few studies have been conducted to understand how different types of land uses affect the edges of mountain parks, it is important to focus on examining characteristics of edge disturbance and understanding how different land use patterns are associated with a particular type of the disturbance.
참고문헌 (28)
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