不同土地利用方式影响下的城市森林植物多样性格局

Land Use Effect on the Urban Forest Plant Diversity Pattern

以厦门城市森林林下层植被为对象,选用α多样性指数及β多样性指数,运用去势对应分析、主成分分析等方法定量研究市区、郊区相思林下植物多样性格局。结果表明:郊区草本层α多样性指数低于城区。城区草本层β多样性随着城市化强度减弱而逐渐增加,灌木层β多样性随着城市化强度降低而降低。郊区森林群落草本层β多样性随着城市化强度增强逐渐增加,而灌木层β多样性随着城市化强度降低呈先增后降趋势。

Taking Xiamen understory vegetation as study object,selecting α and β diversity index,detrended correspondence analysis,principal component analysis were adopted to quantitatively study urban,suburban forest plant diversity. The results showed that urban herb layerα diversity indexes were higher than the suburb＇s. Urban herb layer β diversity indexes incresed with urbanization degree reducing,shrub layer β diversity indexes decreased with urbanization degree reducing. Suburb herb layer β diversity indexes incresed with urbanization degree increasing,shrub layer β diversity indexes first incresed then decreased with urbanization degree reducing.