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应用生态学报 ›› 2010, Vol. 21 ›› Issue (01): 159-164.

• 研究报告 • 上一篇    下一篇

不同模型对拟合大兴安岭林火发生与气象因素关系的适用性

郭福涛1;胡海清1**;马志海2;张扬1    

  1. 1东北林业大学林学院,哈尔滨 150040;2美国纽约州立大学林学与环境科学学院, 锡拉丘兹 13210
  • 出版日期:2010-01-20 发布日期:2010-01-20

Applicability of different models in simulating the relationships between forest fire occurrence and weather factors in Daxing’an Mountains.

GUO Fu-tao1, HU Hai-qing1, MA Zhi-hai2, ZHANG Yang1   

  1. 1School of Forestry, Northeast Forestry University, Harbin 150040, China;2College of Environmental Science and Forestry, State University of New York, Syracuse NY13210, USA
  • Online:2010-01-20 Published:2010-01-20

摘要: 选用符合林火发生数据结构的Poisson和零膨胀Poisson(ZIP)模型对大兴安岭林区1980—2005年间林火发生与气象因素关系进行建模分析,并与普通最小二乘回归(ordinary least squares, OLS)方法的结果进行了对比分析.结果表明:OLS模型对研究区域林火发生与气象因素关系的拟合结果较差(R2=0.215); Poisson和ZIP模型的拟合效果较好,具有较好的火灾次数预测能力,且ZIP模型的预测能力高于Poisson模型.运用AIC和Vuong检验方法对Poisson和ZIP模型的拟合水平进行进一步检验,表明ZIP模型的数据拟合度优于Poisson模型.

关键词: OLS模型, Poisson模型, ZIP模型, 林火, 气象因子, 东南太平洋, 延绳钓, 兼捕, 垂直分布

Abstract: The Poisson’s and Zero Inflated Poisson (ZIP) models that meet the data structure of forest fire occurrence were used to explore the relationships between the forest fire occurrence and climate factors in Daxing’an Mountains in 1980-2005. Compared with the ordinary least squares (OLS) model which often produced poor fitting results (R2=0.215), the Poisson’s and ZIP models operated better, and had better prediction ability on the forest fire occurrence. The AIC and Vuong tests further indicated that ZIP model produced better fitting results, and thus, had better prediction ability than Poisson model.

Key words: OLS model, Poisson model, ZIP model, forest fire, weather factor, southeast Pacific, longline, bycatch, vertical distribution.