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. Author manuscript; available in PMC: 2021 Sep 1.
Published in final edited form as: Aerobiologia (Bologna). 2020 Apr 7;36(3):401–415. doi: 10.1007/s10453-020-09638-8

Table 2:

Allometric equations for pollen production (P^; in billions) of each tree of each focal species as a function of tree basal area (B; in m2) or canopy area (A; in m2). Note that pollen production is log transformed for some species and that these equations do not account for sex ratios of diecious species. *The standard deviation of the quadratic term for Morus alba is 2011.79.

Species Basal area (B) Canopy area (A)
Equation Slope
standard
deviation		 Intercept
standard
deviation		 R2 Equation Slope
standard
deviation		 Intercept
standard
deviation		 R2
Acer negundo P^ = 253.71B + 0.38 47.75 3.26 0.75 P^ = 0.49A - 3.16 0.09 3.72 0.86
Acer platanoides P^ = 25.59B + 1.22 7.00 0.46 0.41 P^ = 0.04A + 0.53 0.01 0.42 0.55
Acer rubrum P^ = 62.32B + 1.27 13.50 0.44 0.72 P^ = 0.10A - 0.10 0.02 0.64 0.69
Acer saccharinum log(P^) = 2.28B + 21.98 0.49 0.28 0.82 P^ = 0.05A + 2.59 0.02 2.33 0.65
Betula papyrifera P^ = 561.16B + 5.03 228.86 4.42 0.94 P^ = 1.27A - 4.73 0.55 8.92 0.89
Gleditsia tricanthos P^ = 659.91B - 3.25 103.36 1.97 0.99 P^ = 0.89A - 6.13 0.14 2.58 >0.99
Juglans nigra P^ = 239.08B + 11.47 64.85 8.22 0.72 P^ = 0.66A + 1.42 0.15 8.30 0.72
Morus alba P^ = 6021.57B2 + 1366.09B + 254.06* 1366.09 93.26 0.97 log(P^) = 0.04A + 24.24 <0.01 0.15 0.83
Platanus × acerifolia P^ = 1066.75B + 1.26 251.73 8.15 0.65 P^ = 1.87A – 26.43) 0.48 16.48 0.68
Populus deltoides log(P^) = 2.01B + 24.17 0.24 0.19 0.47 log(P^) = 0.01A + 23.57 <0.01 0.21 0.78
Quercus palustris P^ = 327.20B + 14.90 100.94 7.41 0.51 P^ = 0.65A + 8.30 0.19 6.88 0.50
Quercus rubra P^ = 423.56B + 36.20 85.45 11.42 0.78 P^ = 0.97A + 17.02 0.16 9.54 0.88
Ulmus americana log(P^) = 5.86B + 23.11 0.35 0.15 0.69 log(P^) = 0.01A + 22.62 <0.01 0.16 0.87