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| The climatic regionalization of the distributional region of Castanopsishystrix |
| Xu Fang,Yang Xiaohui,Liao Huanqin,Pan Wen,Yang Huixiao |
| (Guangdong Provincial Key Laboratory of Silviculture,
Protection and Utilization / Guangdong Academy of Forestry,
Guangzhou,) |
| Abstract: |
| Castanopsis hystrix is one of the important
evergreen broad-leaved tree species in south China
forest. A climatic distribution zoning of C. hystrix was
conducted using principal component analysis and clus-
ter analysis based on 1950-2000 climate data worldwide
from 22 climatic sample plots of their distribution re-
gion. The results showed that there were close correla-
tions between latitude and seasonal temperature, the
lowest temperature in the species distribution areas with
correlation coefficients of 0.71 and -0.72, respectively.
The precipitation of driest month was closely correlated
to annual temperature range and the average tempera-
ture of the driest quarter with correlation coefficients of
0.72 and -0.71, respectively. Principal component anal-
ysis indicated that four climatic factors (precipitation of
coldest quarter, mean temperature of warmest quarter,
precipitation of warmest quarter and maximum tempera-
ture of warmest month) were the most important pa-
rameters discriminating variation among the 22 climatic
samples. The distributional region of C. hystrix could
be divided into four climatic regions: south subtropical
region, mid-subtropical region, West Asia tropics region
and north tropical region, which are differentiated by
precipitation and temperature. |
| Key words: Castanopsis hystrix · Climatic region re-
gionalization · Principal component analysis · Cluster
analysis |
