[Responses of Picea likiangensis radial growth to climate change in the Small Zhongdian area of Yunnan Province, Southwest China].
Picea likiangensis (Franch. ) Pritz. primary forest is one of the dominant forest types in the Small Zhongdian area in Shangri-La County of Yunnan Province. In this paper, the responses of P. likiangensis tree-ring 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 explore 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 temperature 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 sufficient 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 narrow and wide rings. P. likiangensis radial growth was not sensitive to the variation of PDSI.
Ministry of Education Key Laboratory for Silviculture and Conservation, College of Forest Science, Beijing Forestry University, Beijing 100083, China. zhaozhijiang1983@163.com
Zhi-Jiang
ZJ
Zhao
Liu-Yi
LY
Tan
Dong-Wei
DW
Kang
Qi-Jing
QJ
Liu
Jun-Qing
JQ
Li
D002681:China; D057231:Climate Change; D017753:Ecosystem; D028222:Picea / Q000254:growth & development*; D018547:Plant Stems / Q000033:anatomy & histology / Q000254:growth & development*