The niche breadth and niche overlap of 17 kinds of plants in the marshes in Honghe National Nature Reserve were studied.The results showed that there was a broader niche breadth in Carex lasiocarpa,Glyceria spiculosa,Carex pseudocuraica and Calamagrostis angustifolia than other species,because the advantage of widely distribution,quantity,strong competition for the resource utilization contribute to making them dominant species in the research region.Other species such as Menyanthes trifoliate,Salix myrtilloides,Ranunculus monophyllus and Geranium vlassowianum had a narrow niche width; the capacity of resource utilization was weak.Pianka index was used to calculate the niche overlaps of 17 species,which it revealed that 17 species were not of completely overlap.The niche overlap index of 107 species counterparts were lower than 0.2,accounting for 78.7％,and among them 43 species counterparts overlap index was zero,accounting for 31.6％.That indicated that the similarities of resource utilization were low; The relationship between niche overlap of the species and niche breadth was relatively complex.
NETL
NSTL
万方数据
维普
