铁矿废弃地不同恢复模式主要植物种群生态位特征

运用Levins生态位宽度指数和Pianks生态位重叠指数,初步分析了大田县铁矿废弃地不同恢复模式主要植物种群生态位特征。结果发现:①马尾松在R1、R2和R4模式中均有最大的生态位宽度,表明马尾松在铁矿废弃地有较强的利用资源的能力;②从R1模式到R4模式,草本层最大生态位宽度从耐贫瘠、耐干旱的盐肤木逐渐转变为喜肥的宽叶雀稗,表明工程措施和乔灌草模式的综合应用使其草本群落初步具备了缓冲外界干扰的能力;③不同恢复模式生态位宽度大的物种,其一般也有较高的生态位重叠,表明生态位宽度较大的物种间有较一致的利用资源的偏好。

Main Plant Population Niche under the Different Recovery Modes in the Iron Mine Wasteland

By using the Levins Niche Width Index and Pianks Niche Overlap Index,it was initially analyzed the main plant population niche under the different recovery modes in the iron mine wasteland.The resuts show that,①masoon pine trees enjoy the largest niche width under the modes of R1,R2 and R4,indicating that the masson pine trees own the strong capacity of sources utilization in the iron mine wasteland;②From the mode R1 to R4,the largest niche width is changed from the Rhus chinensis with highly tolerance of barren and drought to the Paspalum wettsteinii with fertilizer loving,that means the comprehensive application of the engineering measures and tree-shrub-grass mode gave the herbosa community initial capacity of buffering external interference;③the species with wide niche under different recovery modes generally own the higher niche overlap,indicating the consistent resources utilization preference among the species with wide niche.