福建罗卜岩闽楠(Phoebe bournei)林中优势树种生态位研究

在福建省三明市罗卜岩自然保护区内选择由落叶阔叶树种为主的常绿落叶阔叶混交林向中亚热带典型常绿阔叶林演替过程中的4个不同演替阶段的代表性群落，以群落组成类型作为一维资源位，以树种的重要值作为资源位上的表现特征，定量分析了闽楠林中优势树种生态位宽度和生态位重叠情况。结果表明，大部分的常绿阔叶树种具有较大的生态位宽度值，而落叶阔叶树种则呈现较小的生态位宽度值；两类树种的；生态位虽有一定程度的重叠，但总体仍然较低。这些结果与两类树种对光等生态因子要求不同直接相关。生态位宽度值较大的常绿阔叶树种之间可产生较高的生态位重叠值。生态位宽度值较大的树种与生态位宽度较小的树种也可产生较大的生态位重叠值，但较小生态位宽度值的树种与较大生态位宽度值的树种往往只有小的生态位重叠值，而较小生态位宽度值的树种之间则可有国产高的生态位重叠值。上述的生态位研究结果有助于理解由落叶阔叶树种为主的常绿落叶阔叶林向中亚热带典型常绿阔叶林演替过程中优势各群的生态适应性变化规律。

A study on the niche of dominant species in Phoebe bournei forests in Luoboyan Nature Reserve of Fujian

Four 1600m 2 plots at different succession stages from evergreen broadleaf and deciduous broadleaf mixed community to mid subtropical evergreen broadleaf community are investigated by means of contiguous grid quadrats,5m×5m,to analyze niche breadth and niche overlap of dominant species in Phoebe bournei forests in Luboyan Nature Reserve of Fujian.The results show that shade tolerant evergreen broadleaf species usually show broad niche breadth,while shade intolerant deciduous broadleaf species represen...