Table 5.

Results of hypothesis testing of the abundance in three tree species groups.

Species group	$Y_{\infty }$	$Y_{\infty }^0$ (1)	$Y_{\infty }^0$ (2)	$Y_{\infty }^0$ (3)
Pine	0.0408	0	0.0408	0
Fir	0.0642	0.0642	0	0
Broadleaf	0.8950	0.9358	0.9592	1
F		112.54	122.95	204.56
Sig		0.000000	0.000000	0.000000

Note that there are three scenarios (1) (1) represents scenario one, where the abundance of the pine group tends to zero and the fir group $Y_{\infty }^0$ (2)does not change(2); $Y_{\infty }^0$ represents scenario two, where the abundance of the fir group tends to zero and the pine group (3)does not change(3); $Y_{\infty }^0$ represents scenario three, where the abundances of both the pine and the fir groups tend to zero.