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Title: Stand Density and Canopy Gaps
Author: Zeide, Boris;
Source: Gen. Tech. Rep. SRS–71. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 179-183
Publication Series: Miscellaneous Publication
Description: Estimation of stand density is based on a relationship between number of trees and their average diameter in fully stocked stands. Popular measures of density (Reineke’s stand density index and basal area) assume that number of trees decreases as a power function of diameter. Actually, number of trees drops faster than predicted by the power function because the number depends, in addition to tree size (diameter), on the area of gaps between tree crowns. The gaps are inevitable even in dense even-aged stands with sizeable crown overlap. Taking both factors of self-thinning (increasing tree size and gap area) into account improves estimation of stand density and clarifies several other issues.
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Zeide, Boris 2004. Stand Density and Canopy Gaps. Gen. Tech. Rep. SRS–71. Asheville, NC: U.S. Department of Agriculture, Forest Service, Southern Research Station. pp. 179-183
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