山西历山山地草甸生物多样性、优势种和土壤因素对群落生产力的影响  

Effects of biodiversity, dominant species and soil factors on community productivity in Lishan Mountain meadow,Shanxi province

作　　者：赵峰侠 张瑞 徐明[2,3] 郑云普 ZHAO Feng-xia;ZHANG Rui;XU Ming;ZHENG Yun-pu(College of Geographical Sciences,Shanxi Normal University,Linfen 041004,Shanxi,China;Key Laboratory of Ecosystem Network Observation and Modeling,Institute of Geographic Sciences and Natural Resources Research,CAS,Beijing 100101,China;University of Chinese Academy of Sciences,Beijing 100049,China;School of Water Conservancy and Hydropower,Hebei University of Engineering,Handan 056038,Hebei,China)

机构地区：[1]山西师范大学地理科学学院,临汾041004 [2]中国科学院地理科学与资源研究所生态系统网络观测与模拟重点实验室,北京100101 [3]中国科学院大学,北京100049 [4]河北工程大学水利水电学院,邯郸056038

出　　处：《自然资源学报》2019年第11期2415-2426,共12页Journal of Natural Resources

基　　金：国家自然科学基金项目(41701287);山西师范大学校级自然科学基金项目(02080163)

摘　　要：自然生态系统生产力同生物多样性、优势种功能性状和土壤性质等多因素紧密关联,因此,受到多变量过程的综合调控。利用结构方程模型研究了山西历山山地草甸物种多样性、功能多样性、优势种功能性状和土壤等多变量因素对群落生产力的影响。结果表明:除了物种多样性外(γ=0.10,P=0.69),优势种功能性状(γ=0.61,P=0.00)、功能多样性(γ=0.47,P=0.04)和土壤因素(γ=0.34,P=0.02)直接影响群落生产力,并且土壤因素还通过改变优势种功能性状和功能多样性的方式间接影响群落生产力(间接影响系数分别为0.35、0.27)。优势种功能性状是预测群落生产力变化的最佳变量,其次是功能多样性和土壤因素。因此,理解自然生态系统生产力变化应在引入多元方法的前提下,重点考虑优势种功能性状因素。The productivity of natural ecosystem is closely related to many factors, such as biodiversity, functional traits of dominant species and soil property, thus is controlled by multivariable process. In this paper, the effects of species diversity, functional diversity, functional traits of dominant species and soil factors on community productivity of Lishan Mountain meadow in Shanxi province were studied by using structural equation model. The results showed that species diversity had no effect on productivity(γ=0.10, P=0.69), but the functional traits of dominant species(γ =0.61, P=0.00), functional diversity(γ =0.47, P=0.04) and soil factors(γ =0.34, P=0.02) had a direct impact on productivity, and soil factors had an indirect effect on productivity by the functional traits of the dominant species and functional diversity,with the indirect effect coefficients being 0.35 and 0.27, respectively. The functional traits of dominant species were the best predictors of productivity, followed by functional diversity and soil factors. Therefore, understanding the change of natural ecosystem productivity should be based on the introduction of multiple methods, with emphasis on the functional traits of dominant species.

关 键 词：生物多样性 优势种功能性状 功能多样性 土壤因素 结构方程模型 

分 类 号：G63[文化科学—教育学]