| Autor: |
ZHAO Zhi-jiang, TAN Liu-yi, KANG Dong-wei, LIU Qi-jing, LI Jun-qing |
| Zdroj: |
Chinese Journal of Applied Ecology / Yingyong Shengtai Xuebao; Mar2012, Vol. 23 Issue 3, p603-609, 7p |
| Abstrakt: |
Picea likiangensis (Franch. ) Pritz. primary forest is one of the dominant forest types in the Small Zhongdian area in ShangriLa County of Yunnan Province. In this paper, the responses of P. likiangensis treering width to climate change were analyzed by dendrochronological methods, and the dendrochronology was built by using relatively conservative detrending negative exponential curves or linear regression. Correlation analysis and response function analysis were applied to ex plore the relationships between the residual chronology series (RES) and climatic factors at different time scales, and pointer year analysis was used to explain the reasons of producing narrow and wide rings. In the study area, the radial growth of P. likiangensis and the increasing air tempera ture from 1990 to 2008 had definite 'abruption'. The temperature and precipitation in previous year growth season were the main factors limiting the present year radial growth, and especially, the temperature in previous July played a negative feedback role in the radial growth, while the suffi cient precipitation in previous July promoted the radial growth. The differences in the temperature variation and precipitation variation in previous year were the main reasons for the formation of nar row and wide rings. P. likiangensis radial growth was not sensitive to the variation of PDSI. [ABSTRACT FROM AUTHOR] |
| Databáze: |
Supplemental Index |
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