Niche characteristics of plant populations in Quercus aliena var. acuteserrata stands in Qinling Mountains

Abstract

Abstract: Based on the data collected from³1 plots and using Levins,Hurlbert and Pianka formulas,this paper calculated and analyzed the niche breadths and overlaps of 24 tree and 29 shrub populations in Quercus aliena var. acuteserrata stands in Mt.Qinling,Shaanxi.The results showed that the Levins and Hurlbert's niche breadths of Quercus aliena var. acuteserrata,Pinus armandi,Toxicodendron vernicifluum,Populus davidiana and Pinus tabulaeformis in arbor layer were 3.695,1.695,1.325,0.840,0.702 and 0.036,0.299,0.568,1.721,2.701 respectively,and those of Corrylus heterophylla,Lespedeza formosa and Smilax vaginata in shrub layer were 1.833,1.466,0.984 and 0.111,0.300,0.594,respectively.In general,the niche overlaps between the species with bigger niche breadth and other species were higher,and those of the species having similar environmental requirements were also higher.

Key words: MtQinling, Quercus aliena var acuteserrata, Niche breadth, Niche overlap

CLC Number:

S718.5

ZHAO Yonghua, LEI Ruide, HE Xingyuan, JIA Xia . Niche characteristics of plant populations in Quercus aliena var. acuteserrata stands in Qinling Mountains[J]. Chinese Journal of Applied Ecology, 2004, (6): 913-918.

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