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Table 2 Relationship between by the basal area increment cm2/year during the 25-year period 1972 to 1997 and the four structure variables (symbols defined previously), expressed by the coefficients of a multiple linear regression, for the ten most common species, represented by at least 50 individuals. RSE = residual standard error; iba = average basal area increment cm2/year

From: Diversity and production in an Afromontane Forest

Species N iba M D W T RSE R2
Apodytes dimidiata 124 2.9 0.8420 ns 3.333c 0.8156 ns 0.3424 ns 3.089 0.51
Elaeodendron croceum 125 2.3 1.9731b 3.1575c −0.5256 ns −0.1873 ns 1.748 0.67
Curtisia dentata 303 3.4 1.4611a 3.389c −0.1106 ns 1.131 ns 3.015 0.58
Gonioma kamassi 379 1.8 1.205 c 0.9251c 0.6956a 0.3578 ns 1.383 0.63
Nuxia floribunda 53 2.3 0.5292 ns 1.762 a 0.6324 ns 1.221 ns 1.736 0.68
Ocotea bullata 82 5.3 −0.3746 ns 6.6231b −7.1909a 5.3022 ns 6.027 0.53
Olea capensis macrocarpa 569 8.7 −0.7417 ns 11.87c 0.5479 ns 2.824 ns 7.538 0.63
Podocarpus latifolius 292 5.3 0.4192 ns 6.286c −1.235 ns 4.063b 3.957 0.69
Pterocelastrus tricuspidatus 142 6.7 0.6504 ns 7.1894c 5.0142a 1.4604 ns 5.010 0.68
  1. aat alpha = 0.05; bat alpha = 0.01; cat alpha 0.001