鄂尔多斯高原荒漠化草原与草原化荒漠灌木类群生物多样性的研究

研究了灌木群落生物多样性随环境梯度变化的分布特点并分析了各环境因子对群落生物多样性的影响．结果表明，灌木类群多样性取决于群落的空间配置，特别是群落的草本层组成．从荒漠化草原到草原化荒漠灌木类群的多样性逐渐减小；水分梯度变化是诸生态因子（ 地理坐标、年均温度、最冷、最热月均温、年均蒸发量、日照百分率、年均风速和年均沙暴日数等） 中对群落多样性影响最大的因子，但其显著性偏低，这主要是人类过度放牧和破坏给灌木群落的烙印远远超过了水分梯度变化的影响．

Biodiversity of shrub community in desert steppe and steppe desert on Erdos plateau

This paper studied the distribution characteristics of shrub community diversity with environmental gradients and the influence of environmental factors on community diversity. The results show that the shrub community diversity was decided by the spatial arrangement of community,especially,the composition of herb layer.From desert steppe to steppe desert,the shrub community diversity was gradually decreased. Among the ecological factors such as geological coordinates,annual average temperature,coldest and hottest monthly temperature,annual evaporation,sun radiate percentage,wind velocities and sand storm days,water gradient was the main factor affecting biodiversity.Nevertheless,the influence of water gradient was not at a significant level,because the effect of overgrazing and human's destroying on shrub community was far greater than that of water gradient change.