Geographic Alternative Distribution Pattern and Its Climate Dominant Factors of Pinus Forests in Southern China
The 5 dominant species of Pinus yunnanensis,P.densata,P.armandii,P.kesiya and P.massoni-ana were collected to reveal the alternative distribution patterns of Pinus forests and climatic constraints in south-ern China.MaxEnt model was used to predicted geographic distribution of Pinus forests after collecting the spe-cies and bio-climatic factors data.The differences of ecological niches among 5 species were quantified by dis-criminant analysis,variance analysis,kernel density analysis and principal component analysis to explain the geo-graphic alternative distribution patterns of vegetation and dominant climatic factors.The results showed that pre-diction accuracy of habitat zone was higher as AUC values of the 5 Pinus forests were all greater than 0.9,indicat-ing that the prediction accuracy of the suitable area was high;the typical geographic substitution distribution exis-ted in 5 Pinus forests;the mean diurnal range,isothermality,and temperature seasonality were the dominant tem-perature factors causing the niche differentiation of the 5 species.And the precipitation in the driest month and the precipitation of coldest quarter were the dominant precipitation factors of the difference of ecological niche in 5 species.The differences of ecological amplitude variation among 5 Pinus forests in different climatic factors in-dicate the variables of characterizing seasonal differences,such as temperature change and seasonal precipitation were the main reason of geographic substitution in the distribution of the 5 Pinus forests in southern China.
Pinussouthern Chinaecological niche simulationclimate factorgeographical alternative dis-tribution
万方数据
维普
