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Your Position :Home->Past Journals Catalog->2011年48 No.4

Gallery vertical distribution pattern of Ips subelongatus in standing larch
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Key Words: subelongatus, gallery, distribution pattern, aggregation index, regression
Abstract:

       The vertical distribution pattern of Ips subelongatus Motschulsky galleries was examined using the aggregation indices of Iwao and Taylor. The results indicate that the number of I. subelongatus galleries has a linear relationship with different heights of larch trunks; the relationship being described by the equation y= - 10.867x+92.884 Galleries of I. subelongatus have a uniform spatial distribution with no difference in abundance between sunny and shaded sides of the tree. The optimum sampling number was determined for different gallery densities.

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