Figure 3. Path diagram based on analysis of data from managed plots. Solid arrows indicate direct positive effects, solid lines with a circle-head indicate direct negative effects. Numbers next to effects are values of the significant path coefficients. Thickness of lines indicates relative effect size. The model statistically fit the data (i.e. no significant differences between the correlational matrices of data versus model matrices; X² = 12.55, DF = 8, P = 0.1281).