Spatial coexistence of American beech and sugar maple regeneration in post-harvest northern hardwood forests

Table 7 Linear mixed-effects intercept and slope parameter estimates with standard errors in parentheses and associated p values

Dependent variable	Independent variable	Intercept (SE)	p value	Slope (SE)	p value	Site SD	Range (m)	Nugget (m)	R ²
Sugar maple h1	Beech total	1.455 (0.686)	0.034	0.016 (0.008)	0.033	1.075	15.382	0.163	0.405
Sugar maple h1	Beech h2 + h3	1.464 (0.682)	0.032	0.016 (0.009)	0.078	1.068	15.362	0.162	0.403
Sugar maple h2 + h3	Beech total	0.808 (0.281)	0.004	0.014 (0.007)	0.035	0.360	13.134	0.241	0.126
Sugar maple h2 + h3	Beech h2 + h3	0.813 (0.279)	0.004	0.015 (0.008)	0.052	0.354	13.136	0.241	0.125
Sugar maple total	Beech total	1.836 (0.742)	0.013	0.025 (0.008)	0.002	1.170	13.874	0.136	0.404

Also shown is the standard deviation of the site random effect, range, and nugget parameters of the spherical variograms included in the models to account for the residual correlation. Five models were fit with sugar maple height class 1 (h1), height class 2 (h2), height class 3 (h3), and total density as the dependent variables, and beech height classes h2 and h3 and total density as the independent variables

ISSN: 1297-966X