倪永明1, 2, 欧阳志云2, 胥彦玲3 , 李湘涛1

(1 北京自然博物馆, 北京100050; 2 中国科学院生态环境研究中心系统生态重点实验室, 北京100085; 3 西安理工大学环境科学研究所, 西安710048)

摘　要: 本研究在新疆荒漠植被型分类的基础上, 用植被与气候Holdridge 生命带模型进行荒漠植被型的模拟, 并用Kappa 检验系数进行结果检验, 模拟结果很差(0.19) , 将地形作为模拟模型具体考虑的一个因素, 对重新分类的气候区进行二次植被模拟。二次模拟结果Kappa 检验系数平均值为0.45, 二次模拟整体荒漠植被型模拟结果的Kappa 检验系数为0.64, 极大地提高了模型模拟的准确度。模型模拟准确度的提高在于将影响新疆水分分配的地形因素作为改进Holdridge 生命带模型的参数, 该参数的引入为提高Holdridge 生命带模型的准确度提供了新的思路, 也为较准确地模拟新疆地区的植被提供了新途径。

关键词: 新疆; 荒漠植被型; Holdridge 生命带; 地形; 气候区

中图分类号:Q 948　　　文献标识码:A

Appl ication of Landform-based Desert Vegetation-Climate Model in Xin jiang Uygur Autonomous Reg ion

NI Yongming1,2,OU YANG Zhiyun2,XU Yanling3 ,LI Xiangtao1,2

(1 Beijing Natural History Museum ,Beijing, 100050, China; 2 Research Center for Eco2Environmental Sciences, Chinese Academy of Sciences, Beijing 100085, China; 3 Institute of Environment Science of Xi’an University of Techno logy, Xi’an 710048, China)

Abstract: Based on the classification of desert vegetation s in Xinjiang, the paper employs the Holdridge life zone model to simulate the desert vegetation types in Xin jiang and adopts Kappa coefficient to verify the simulation finding that it perform s poorly (Kappa coefficient: 0.19). Then, it simulates the types of desert vegetation in the reclassified climatic zones with landform as a facto r once again. The average Kappa coefficient is 0.45 in the reclassification of the climatic zones and the Kappa coefficient is 0.64 in the second simulation of all the desert vegetation s, which indicates a great increase in the simulation accuracy. The increased accuracy in the simulation model mainly contributes to taking landform affecting water distribution in Xin jiang as a parameter in modifying  Holdridge  life zone model and the integration of this parameter creates a new app roach to raising the accuracy of Holdridge life zone model and a new w ay to simulate the vegetation s in Xin jiang more accurately.