克拉玛依农业综合开发区外围荒漠植被主要植物种的生态位分析

采用Shannon-Wiener指数和Pianka测度方法,分别从群落梯度和3个单一环境因子(土壤水分、盐分、酸碱度)对构成克拉玛依农业综合开发区外围荒漠植被的10个主要植物种的生态位分化进行了定量分析。结果表明:①白刺、梭梭和白梭梭的生态位较宽,分布较广,数量较多,利用资源充分,而盐穗木、盐节木和红砂的生态位较窄,生长范围狭小,其余主要物种介于两者之间;②根据生态宽度可以把10个主要植物种划分成4类;③所测度的物种在土壤水分维上的生态位重叠都较大,而在盐分和酸碱度维上则表现出了较大的分异。

An Analysis on the Niches of Main Species of Desert Vegetation in the Outer Space of Karamay Agricultural Comprehensive Developmental Region

The niches of ten main species in outer space of Karamay Agricultural Comprehensive Developmental Region are analyzed quantitatively with respect to community gradients and three single environmental factors, i.e. soil moisture, soil salinity and soil acidity, by Shannon-Wiener index and Pianka method. The results indicate that: ①Nitraria roborowskii,Haloxylon ammodendro and Haloxylon persicum have broader niche, wider distribution, more quantity and make good use of resources. But Halostachys belangeriana,Halocnemum strobilaceum and Reaumuria soongorica have narrower niche and growth scopes. Others are situated between the two; ② These ten species can be divided into four groups based on niche breadth; ③All niche overlaps among ten species are larger on soil moisture dimension, but they show significant differentiation on soil salinity and soil acidity dimensions.