TABLE 2 The dependence of relative competition index (RCI) and leaf construction cost per unit of mass (CCmass) ofGalinsoga quadriradiata on the experimental treatments based on GLMM. The invasive plant population types (PopType): edge population and central population. Nitrogen treatments (NTC): deionized water, 3 g L-1 NH4NO3 solution, and 6 g L-1 NH4NO3solution. Competitor types (CompType): mixed with new competitors and mixed with old competitors. The bold value indicates that it is statistically significant at α = 0.05 level.