Table 1.

Threshold minimum, mean and maximum temperatures corresponding to the 95 % probability of active xylogenesis in Juniperus przewalskii estimated during 2009–2014 at the lower and upper study treeline sites

Site	Temperature (°C)	Year						F	P
		2009	2010	2011	2012	2013	2014
Lower treeline	Minimum	2.5 ± 0.4a	5.0 ± 0.7b	2.4 ± 0.7a	1.8 ± 0.4a	2.0 ± 0.9a	0.0 ± 0.7c	29.93	<0.001
	Mean	7.2 ± 0.4a	9.3 ± 0.8b	7.5 ± 0.7a	6.0 ± 0.4a	6.3 ± 0.9a	4.5 ± 0.7c	26.33	<0.001
	Maximum	12.0 ± 0.5a	14.2 ± 0.9b	12.0 ± 1.0a	10.0 ± 0.4c	11.3 ± 0.9a,c	9.8 ± 0.8c	21.80	<0.001
Upper treeline	Minimum	1.9 ± 0.2a,b	4.5 ± 0.3c	2.4 ± 0.4a	1.0 ± 0.6b	1.2 ± 0.9b	-0.5 ± 0.4d	53.83	<0.001
	Mean	5.9 ± 0.2a,b	8.0 ± 0.3c	6.4 ± 0.3a	4.5 ± 0.6d	5.0 ± 0.9b,d	3.4 ± 0.4e	52.06	<0.001
	Maximum	10.1 ± 0.2a,b	12.2 ± 0.3c	10.8 ± 0.5a	7.9 ± 0.6d	9.4 ± 0.9b	8.1 ± 0.4d	51.31	<0.001

Results from an ANOVA are reported as F and P statistics. Different letters within a row indicate significant differences at P < 0.05.