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Tree diversity,distribution, history and change in urban parks: studies in Bangalore,India 总被引:2,自引:1,他引:1
Urban parks constitute critical biodiversity hotspots in crowded, concrete-dominated city environments. Despite the importance,
they remain little researched. This paper assesses the biodiversity and distribution of trees in urban parks in the southern
Indian city of Bangalore. 127 plots were used to survey tree distribution in parks across the city. The distribution is largely
dominated by a few common species. The proportion of exotic species was very high, with 77% of trees belonging to introduced
species. Park history had an impact on distribution. Old parks had fewer but larger trees, and greater species diversity compared
to recently established parks. Old parks also differed in species composition, having a greater proportion of large canopy
trees compared to young parks. Examination of size distributions revealed that large canopied species were gradually being
phased out, and replaced by narrow and medium sized tree species which are easier to maintain, but which may not provide the
same environmental and ecological benefits. Greater attention requires to be paid to the selection of trees in cities, not
just with a view to easy maintenance as is currently the case, but to select an appropriate mix of trees that supports biodiversity
and maximizes environmental and ecosystem services. 相似文献
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