Radial Growth Responses of Pinus densata to Climate Change in Haba Snow Mountain,Southwest China

doi:10.13466/j.cnki.lyzygl.2019.02.010

Abstract

Abstract:

Based on the dendrochonological method,we collected tree ring samples at upper and lower distributional limits of Pinus densata in Haba Snow Mountain to reveal the key climatic factors affecting tree radial growth by studying the relationship between residual chronologies and climatic factors.The results showed that radial growth of P.densata at the upper distributional limits was mainly affected by the hydrothermal condition in previous August,its growth was also significantly correlated with monthly maximum temperature in current March (positive),monthly mean temperature in current May (negative),and precipitation in current June (negative). At lower distributional limits,hydrothermal condition in current May was the main factor affecting its radial growth,while precipitation in December of previous year also promoted its growth.The relationship between the radial growth of P.densata and climate factors was stable.This study is a favorable supplement to the tree ring research in Hengduan Mountains,and it can also provide a theoretical basis for forest protection under future climate change.

Key words: northwest Yunnan plateau, tree ring, climate response, Hengduan mountains, temperature and precipitation

CLC Number:

S718.5
P467

WANG He, ZHOU Jun, QIN Xinhao, ZHANG Yun. Radial Growth Responses of Pinus densata to Climate Change in Haba Snow Mountain,Southwest China[J]. FOREST RESOURCES WANAGEMENT, 2019, (2): 67-72.

Figures/Tables 6

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采样点	经度	纬度	海拔/m	样本量(树/样芯)
海拔上限	100°08'51.34″	27°21'15.16″	3458	32/63
海拔下限	100°09'30.94″	27°21'04.30″	2766	32/62

年表	海拔上限	海拔下限
样本量(树/样芯)	31/61	30/60
起止时间/年	1929—2017	1914—2017
平均敏感度	0.16	0.20
标准差	0.14	0.17
EPS >0.85起始年/样芯数	1934/8	1939/11
公共区间统计量(1960—2017年)
信噪比	41.00	14.00
第一主成分方差解释量/%	46.24	37.79
样本总体代表性	0.98	0.93