Table 4.

Results of forward stepwise multiple regression models of the explanatory variables and the three components (α, β and γ) of phylogenetic and functional diversity along the study transects.

	Study transect	Dependent variable	Regression equation	F	R 2
Within elevations	BR	αDISPHY	y = −5.036 + 1.064 RArea	33.203	0.787***
		βDISPHY	y = −1.845 + 1.009 PC1hetero	11.781	0.567**
		γDISPHY	y = −7.389 + 1.488 RArea	21.398	0.704***
		αDISFUN	y = −1.216 − 2.111 PC2hetero	11.798	0.567**
		βDISFUN	y = −1.692 − 2.817 PC2hetero	12.588	0.583**
		γDISFUN	y = −2.285 − 4.256 PC2hetero	20.433	0.694***
	SO	αDISPHY	y = −0.450 + 0.281 PC1clim	12.167	0.549**
		βDISPHY	y = −0.348 + 0.250 PC1clim	6.772	0.404*
		γDISPHY	y = −0.465 + 0.350 PC1clim	13.139	0.568**
		αDISFUN	y = −0.985 + 0.261 PC1hetero	10.194	0.505**
		βDISFUN	y = −0.638 + 0.431 PC1hetero	21.023	0.678***
		γDISFUN	y = −1.234 + 0.266 PC1hetero	9.952	0.499**
	BB	αDISPHY	y = 4.717 − 2.084 PC1clim	32.764	0.868**
		βDISPHY	y = 2.808 − 1.302 PC1clim	47.121	0.904***
		γDISPHY	y = 5.749 − 2.563 PC1clim	39.823	0.888***
		αDISFUN	y = 2.542 − 1.364 PC1clim − 0.323 PC2hetero	47.417	0.960*
		βDISFUN	y = 0.567 − 0.699 PC1clim	23.002	0.821**
		γDISFUN	y = 3.186 − 1.679 PC1clim − 0.421 PC2hetero	45.861	0.958*
Between elevations	BR	βDISPHY	y = − 0.381 − 1.083 Distrarea − 0.001 Distele	80.880	0.757***
		βDISFUN	y = − 0.605 − 0.905 Distclim + 0.006 Distele	50.982	0.662***
	SO	βDISPHY	y = − 0.896 − 0.705 Distrarea	21.461	0.251***
		βDISFUN	y = − 1.363 − 0.063 Distclim − 0.078 Disthabit	4.506	0.125*
	BB	βDISPHY	y = 0.473 + 1.011 Distrarea − 2.118 Distclim	11.638	0.564***
		βDISFUN	y = − 0.700 + 0.755 Distrarea − 1.264 Distclim	8.270	0.479**

The abbreviations for the study transects, explanatory variables and diversity indices are defined in Tables 2 and 3. *P < 0.05; **P < 0.01; ***P < 0.001.