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Page 7 <br />II. Urban Forest Cover and Leaf Area <br />Many tree benefits equate directly to the amount of healthy leaf surface area of the plant. Trees cover about 225.3 <br />acres of City of Pleasanton and provide 1228 acres of leaf area. <br />In City of Pleasanton, the most dominant species in terms of leaf area are Sycamore spp, Coast redwood, and Coastal <br />live oak. The 10 species with the greatest importance values are listed in Table 1. Importance values (IV) are <br />calculated as the sum of percent population and percent leaf area. High importance values do not mean that these <br />trees should necessarily be encouraged in the future; rather these species currently dominate the urban forest <br />structure. <br />Table 1. Most important species in City of Pleasanton <br />Species Name <br />Percent <br />Population <br />Percent <br />Leaf Area IV <br />Sycamore spp 11.7 17.4 29.1 <br />Coast redwood 8.6 12.3 20.9 <br />Coastal live oak 9.4 8.9 18.3 <br />California white oak 6.2 6.4 12.7 <br />Ash spp 4.5 7.2 11.7 <br />Sweetgum 4.2 4.7 8.9 <br />Chinese pistache 6.9 1.9 8.7 <br />Common crapemyrtle 5.9 0.5 6.4 <br />Callery pear 3.3 2.4 5.6 <br />Chinese hackberry 1.8 2.5 4.3