Table 2.

Effects of warming on leaf functional traits (mean ± SE) in the four key species, Damao Banner, Nei Mongol, China (n = 9)

Species	Treatment	SLA (cm2·g–1)	Nmass (mg·g−1)	Narea (g·m−2)	Aarea (μmol·m–2·s–1)	PNUE (μmol· s–1 N·g–1)	ΦPSII (dimensionless)	Fv'/Fm' (dimensionless)
C. squarrosa	AM	85.78 ± 2.39 a	23.90 ± 0.66 b	2.83 ± 0.12 b	2.10 ± 0.21 a	0.75 ± 0.09 a	0.50 ± 0.02 b	0.56 ± 0.02 b
	MW	70.09 ± 5.28 b	28.37 ± 0.94 a	4.23 ± 0.33 a	2.14 ± 0.65 a	0.52 ± 0.15 ab	0.54 ± 0.02 ab	0.62 ± 0.02 ab
	SW	70.36 ± 7.70 b	26.83 ± 1.14 a	4.18 ± 0.47 a	1.29 ± 0.40 a	0.38 ± 0.14 b	0.57 ± 0.03 a	0.65 ± 0.04 a
T. terrestris	AM	119.05 ± 7.03 a	45.74 ± 1.34 a	3.94 ± 0.18 b	10.15 ± 1.63 ab	2.70 ± 0.43 a	0.63 ± 0.02 a	0.79 ± 0.01 a
	MW	100.18 ± 4.71 b	46.46 ± 1.72 a	4.70 ± 0.22 a	11.04 ± 1.73 a	2.45 ± 0.43 ab	0.65 ± 0.02 a	0.76 ± 0.02 a
	SW	107.58 ± 11.47ab	51.84 ± 2.96 a	4.85 ± 0.24 ab	2.12 ± 0.62 b	0.43 ± 0.11 b	0.58 ± 0.08 a	0.74 ± 0.01 a
S. tianschanica	AM	69.38 ± 1.53 a	24.94 ± 0.73 a	3.60 ± 0.09 a	3.13 ± 0.35 a	0.87 ± 0.10 a	0.47 ± 0.02 a	0.67 ± 0.01 a
	MW	64.09 ± 2.79 a	23.63 ± 1.04 a	3.73 ± 0.13 a	2.60 ± 0.55 ab	0.78 ± 0.15 ab	0.51 ± 0.02 a	0.71 ± 0.02 a
	SW	66.93 ± 1.39 a	22.86 ± 0.81 a	3.43 ± 0.15 a	1.51 ± 0.54 b	0.41 ± 0.12 b	0.51 ± 0.03 a	0.68 ± 0.04 a
N. pectinate	AM	65.88 ± 3.69 a	29.28 ± 0.97 a	4.59 ± 0.25 a	2.42 ± 0.48 a	0.57 ± 0.13 a	0.58 ± 0.02 a	0.74 ± 0.02 a
	MW	54.44 ± 7.39 a	29.75 ± 2.41 a	5.73 ± 0.70 a	2.17 ± 1.12 a	0.44 ± 0.25 a	0.59 ± 0.03 a	0.72 ± 0.02 a
	SW	62.91 ± 8.61 a	29.99 ± 2.57 a	5.02 ± 0.94 a	2.86 ± 1.36 a	0.49 ± 0.22 a	0.65 ± 0.03 a	0.74 ± 0.03 a

Bold font and different lowercase letters indicate significant differences among different warming treatments (p < 0.05). AM, MW, and SW represent ambient temperature as control, moderate warming and severe warming, respectively