Larch timberline and its development in North China

doi:10.1659/0276-4741(2002)022[0359:LTAIDI]2.0.CO;2

CORC > 北京大学 > 地球与空间科学学院

	Larch timberline and its development in North China
	Liu, HY ; Tang, ZY ; Dai, JH ; Tang, YX ; Cui, HT
刊名	mountain research and development
	2002
关键词	Alpine timberline Larix vegetation-climate relationship palaeovegetational reconstruction temperate broadleaved forest zone China VEGETATION ELEVATION
DOI	10.1659/0276-4741(2002)022[0359:LTAIDI]2.0.CO;2
英文摘要	Alpine vegetation and timberline development were investigated on 4 high mountains in North China: Mt. Taibai (34degreesN, 108degreesE, 3767 m), Mt. Guandi (38degreesN, 111.5degreesE; 2831 m), Mt. Wutai (39degreesN, 113.6degreesE; 3058 m), and Mt. Xiaowutai (40degreesN, 115degreesE; 2882 m). The relationships between distribution of tree species and climatic factors on the uppermost parts of these mountains were established, As a result of the continental climate, their timberlines are composed of larch species, such as Larix chinensis on Mt. Taibai and Larix principisrupprechtii on the other mountains. Two climatic indices, a warmth index (WI) and a humidity index (HI), were calculated for a differentiation of tree species near the timberline. A WI of 15degreesC mo has been commonly regarded as the limit for the timberline in East Asia. In addition, we suggest that the Larix timberline is formed when the HI is lower than 210. The understorey species of the forest patches inside the timberline and the L chinensis forest are similar on Mt. Taibai. These species are also distributed mostly in subalpine scrubs and meadows rather than in the Abies fargesii forest. This implies greater resistance to cold and drought in L chinensis than in A fargesii. Timberline movements were roughly reconstructed through analysis of sediments from the alpine zone of Mt, Taibai A drier climate during 1830-1450 C-14 years BP resulted in a lower Abies timberline and was favorable for distribution of Larix, reflected by pollen diagrams and palaeolimnological evidence, such as grain size and total organic carbon. Percentages of Abies/Picea pollen recurred from 1450 to 680 C-14 years BP, implying an upward movement of Abies/Picea. Abies/Picea then moved downward, and the timberline was possibly replaced by Larix. In recent centuries, Picea/Abies has tended to move upward again.; Environmental Sciences; Geography, Physical; SCI(E); 11; ARTICLE; 4; 359-367; 22
语种	英语
内容类型	期刊论文
源URL	[http://ir.pku.edu.cn/handle/20.500.11897/388113]
专题	地球与空间科学学院
推荐引用方式 GB/T 7714	Liu, HY,Tang, ZY,Dai, JH,et al. Larch timberline and its development in North China[J]. mountain research and development,2002.
APA	Liu, HY,Tang, ZY,Dai, JH,Tang, YX,&Cui, HT.(2002).Larch timberline and its development in North China.mountain research and development.
MLA	Liu, HY,et al."Larch timberline and its development in North China".mountain research and development (2002).