Distribution Characteristics of the Alpine Treeline and Vegetation Response to Climate Change of Taibai Mountain, China

Table 3

Treeline elevation distribution with different slope types.

Type	Slope range	Average value/m				Maximum value/m				Proportion %
		1987	2000	2010	2020	1987	2000	2010	2020
Flat slope	0~5°	3016.438	3055.691	3075.618	3016.948	3397	3635	3619	3365	0.228
Gentle slope	5~15°	3018.766	3063.646	3063.87	3029.783	3453	3662	3630	3473	8.693
Slope	15~25°	3018.533	3063.196	3063.51	3031.08	3592	3692	3630	3480	26.136
Abrupt slope	25~35°	3018.567	3062.434	3063.831	3031.014	3540	3692	3631	3480	50.955
Steep slope	35~45°	3018.511	3064.261	3063.878	3028.609	3565	3662	3631	3420	13.781
Dangerous slope	>45°	3004.163	3027.139	2927.336	2913.508	3577	3151	3619	3157	0.207