Fig. 3From: The significance of biomass allocation to population growth of the invasive species Ambrosia artemisiifolia and Ambrosia trifida with different densitiesPath analysis of growth characteristics and seed number in A. artemisiifolia under different population densities. The dotted line indicates a path with no significant effect (n; P > 0.05), the thin line indicates a significant path (*P < 0.05), and the bold line indicates a highly significant path (**P < 0.01)Back to article page