Table 1.

Spearman correlation (R) between species richness, phylogenetic diversity, and environmental factors on the Qinghai-Tibetan Plateau

	Species richness			Phylogenetic diversity (PD)
	All	Herbaceous	Woody	All	Herbaceous	Woody
Climate–Energy availability
MAT	0.33	0.29	0.54	0.42	0.39	0.57
PET	0.27	0.23	0.48	0.35	0.31	0.51
MTCM	0.36	0.33	0.50	0.45	0.43	0.52
MTWM	0.23	0.19	0.47	0.31	0.27	0.51
CI	−0.36	−0.32	−0.55	−0.46	−0.43	−0.58
WI	0.24	0.20	0.49	0.32	0.29	0.52
Climate–Climatic stability
ART	−0.41	−0.40	−0.30	−0.43	−0.44	−0.29
TSN	−0.42	−0.42	−0.31	−0.44	−0.46	−0.31
PSN	−0.40	−0.41	−0.32	−0.43	−0.44	−0.34
Climate–Water availability
AP	0.64	0.64	0.49	0.69	0.70	0.52
AET	0.65	0.65	0.50	0.69	0.70	0.53
RAIN	0.63	0.63	0.50	0.68	0.70	0.53
Habitat Heterogeneity
VT	0.40	0.39	0.47	0.45	0.43	0.54
SWV	0.38	0.37	0.44	0.42	0.40	0.49
TOPO	0.28	0.27	0.38	0.32	0.30	0.41

All with P value < 0.01.

MAT = mean annual temperature; PET = potential evapotranspiration; MTCM = mean temperature of the coldest month; MTWM = mean temperature of the warmest month; CI = coldness index; WI = warmth index; ART = annual range of temperature; TSN = temperature seasonality; PSN = precipitation seasonality; AP = annual precipitation; AET = actual annual evapotranspiration; RAIN = rainfall; VT = number of vegetation types; SWV = Shannon–Wiener Index of vegetation types; and TOPO = topographical heterogeneity.