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Benefit Density and Street Tree Density z-scores for Providence block groups in the 2000 U.S. Census. van and Prestemon (2012) have established that not all street trees function equally, regardless of species type and size. In particular, larger stat- ured street tree species generally provide many more ecosystem services than smaller statured street tree species. The role played by street trees in providing these services is increasingly seen by municipalities as important (Seamans 2013). Therefore, if understanding relative street tree function and performance in a spatial con- text is desired, then measures incorporating ben- efit estimates should be considered in addition to measures based on tree counts when analyzing the spatial distribution of municipal street trees. LITERATURE CITED Anderson, L.M., and H.K. Cordell. 1988. Influence of trees on residential property values in Athens, Georgia (USA): A survey based on actual sales prices. Landscape and Urban Planning 15:153–164. 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Journal of Applied Meteo- rology and Climatology 48:199–216. McPherson, E.G., and R.A. Rowntree. 1989. Using structural mea- sures to compare twenty-two U.S. street tree populations. Land- scape Journal 8(1):13–23. ©2014 International Society of Arboriculture
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