Title: Spatial patterns of elm density in Otingdag Sandy Land
Abstract: We studied the spatial distribution pattern of elm population at southern edge of the Otindag Sandy Land by the method of point pattern analysis.The results show that:(1)The growth index of elm decreases with the increase of the density,and when the density of elm population is more than 27 per hectare the growth index of natural elm does not change significantly;(2)The spatial distribution pattern does not change significantly with scale when the elm population under the low-density and under the mid-density.In all scales the spatial distribution pattern of the elm population tends to clumped,just quadrat 5 tended to random distribution.The elm population suffers from the largest gathering strength when under different density,and the largest gathering strength decreases with the increase of the density.Their spatial distribution pattern is closely related to the spatial scale when the elm population under the high-density,when the spatial scale is less than the critical value of 23m or 28m,the elm population tends to random distribution pattern,and it tends to cluster spatial pattern of distribution when the spatial scale exceeds a certain critical value.
Publication Year: 2011
Publication Date: 2011-01-01
Language: en
Type: article
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Cited By Count: 4
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