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Influence of climatic conditions,topography and soil attributes on the spatial distribution of site productivity index of the species rich forests of Jalisco,Mexico

查看全文 作　　者：Adel [1]Mohamed;Robin [2]M.Reich;Raj [3]Khosla;C.Aguirre-[4]Bravo;Martin Mendoza Brise[5]o 高影响力作者 机构地区：[1]Department of Ecology and Rangeland Stewardship,Desert Research Center;[2]Department of Forest and Rangeland Stewardship,Colorado State University;[3]Department of Soil and Crop Sciences,Colorado State University;[4]USDA Forest Service;[5]Colegio de Postgraduados高影响力机构 出　　处：《Journal of Forestry Research》索引2014年第25卷第1期,共9页高影响力期刊 摘　　要：This paper presents an approach based on field data to model the spatial distribution of the site productivity index(SPI)of the diverse forest types in Jalisco,Mexico and the response in SPI to site and climatic conditions.A linear regression model was constructed to test the hypothesis that site and climate variables can be used to predict the SPI of the major forest types in Jalisco.SPI varied significantly with topography(elevation,aspect and slope),soil attributes(pH,sand and silt),climate(temperature and precipitation zones)and forest type.The most important variable in the model was forest type,which accounted for35%of the variability in SPI.Temperature and precipitation accounted for 8 to 9%of the variability in SPI while the soil attributes accounted for less than 4%of the variability observed in SPI.No significant differences were detected between the observed and predicted SPI for the individual forest types.The linear regression model was used to develop maps of the spatial variability in predicted SPI for the individual forest types in the state.The spatial site productivity models developed in this study provides a basis for understanding the complex relationship that exists between forest productivity and site and climatic conditions in the state.Findings of this study will assist resource managers in making cost-effective decisions about the management of individual forest types in the state of Jalisco,Mexico. 关 键 词：空间分布特性 生产力指数 气候条件 森林立地 土壤属性 墨西哥 哈利 空间分布模型
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