植被性状与高原鼢鼠栖息地适合度的关系

Correlations between vegetation properties and fitness of plateau zoker habitat

本研究以鼠群密度代表生境适合度,在高原鼢鼠(Myospalax baileyi)5个密度梯度上对植被盖度、高度、地上生物量和植物多样性等性状指标进行了分析。结果表明,植被性状的各项指标均与鼠群密度存在显著的相关性。其中,植被盖度和高度与高原鼢鼠种群密度表现为极显著线性相关,地上生物量和植物多样性表现为非线性(单峰曲线)相关。植被高度和生物量易受到环境中不确定因素的干扰,而盖度和多样性则相对稳定,因而,后者在用于高原鼢鼠生境适合度推测和种群发展趋势的预测中具有更高的准确性。

The study was that using population density of plateau zokor（Myospalax baileyi）on behalf of habitat suitability analyzed the correlations between vegetation properties, such as cover, height, aboveground biomass and plant diversity, and five gradients of population densities of plateau zokor. The results of this study showed that all of vegetation property indices had significant correlations with population densities. The vegetation cover and height showed extremely significant linear correlation with population densities, whereas the aboveground biomass and species diversity showed non-linear correlation （unimodal curve）. However, the vegetation height and aboveground biomass were often disturbed by uncertain enviromental factors, but the vegetation cover and species diversity were relatively stable. Therefore, the latter are more accurate in conjecturing the suitability of plateau zoker habitat and predicting the trend of population development.