Relative height growth rates of the invasive and native species according to the environmental conditions. Relative height growth rates (RGRh, mm. mm-1. d-1. 10-3). Values are means of nine to twelve seedlings (± 1 SE of the mean) for the invasive species (A. negundo, full diamonds), late-successional native species (F. excelsior and F. angustifolia, grey triangles) and early-successional native species (S. alba and P. nigra, open squares) across the three shade levels (Full light C, Shade S, Deep shade SS), the two nutrient levels (nutrient supply N+ vs. no supply N-) and the two disturbance regimes (Disturbed D vs. Non-disturbed ND).
Porté et al. BMC Ecology 2011 11:28 doi:10.1186/1472-6785-11-28