66 Weinberger et al.: A Review of Spatial Variation of Allergenic Tree Pollen Within Cities Study Celenk et al. 2010 Katelaris et al. 2004 APPENDIX I. MAJOR FINDINGS BY STUDY. Taxa Major findings All All Over the course of the year, the total number of tree pollen grains was more than 35% higher at the European site than at the Asian site (28,227 grains versus 20,894 grains). Total pollen concentrations for the entire sampling period were 14,382 grains/m3 , 11,584 grains/m3 , and 9,269 grains/m3 at the three sites (Homebush, Eastern Creek, and Nepean, respectively). Daily concentrations of total pollen were classified into high, medium, and low concentrations. Pairs of sites were evaluated for discordance in the classification of days. On 8%, 13%, and 17% of days, pollen concentrations were high at one site and low at the other for Eastern Creek versus Nepean, Homebush versus Nepean, and Homebush versus Eastern Creek, respectively. Gonzalo-Garjo et al. 2006 All No differences between any of the four traps were detected for the cypress family. For oak, the urban traps were not significantly different from each other, but they were significantly different from the suburban trap. For olive and sycamore, the urban traps were significantly different not only from the suburban trap but also from each other. Alcazar et al. 2004 Sycamore The total concentration ranged from 241 grains/m3 to 48,957 grains/m3 fold difference), and from 664 grains/m3 grains/m3 Myszkowska et al. 2012 Nowak et al. 2012 Rodriguez-Rajo et al. 2010 All at the northern site at the southern site in 2000 (a greater than 200- at the northern site to 16,335 7% higher at site L than at site B (12,414 grains/m3 grains/m3 over the season were observed for some tree taxa. Sycamore Annual sycamore totals were 10 to 20 times lower at the site farther from sycamore trees than at a site closer to sycamore trees. alder, and three period, as well as the number of days with pollen concentrations herbaceous taxa higher than 50 grains/m3 Birch, hazelnut, The total amount of each pollen type collected over the three-year , was higher at a rural site than at a urban site. The differences were larger for the herbaceous taxa than the tree pollen taxa. Velasco-Jiménez et al. 2012 Raynor et al. 1975 All Daily concentrations of most pollen types were not significantly different at the two sites, with some exceptions. Olive, sycamore, and the nettle family were higher at the southwest site, while oak, cypress, and poplar were higher at the northeast site in most years. Total tree pollen, Differences between pairs of samplers in a giving sampling line ragweed ©2015 International Society of Arboriculture increased as a function of distance in most tests. Even samples taken at the center site in 2001 (a greater than 20-fold difference). The total amount of tree pollen collected over the season was about ). More pronounced differences in total pollen collected versus 11,631
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