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Reconstructing the Spatial Pattern of Trees from Routine Stand Examination Measurements

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Reconstruction of the spatial pattern of trees is important for the accurate visual display of unmapped stands. The proposed process for generating the spatial pattern is a nonsimple sequential inhibition process, with the inhibition zone proportionate to the scaled maximum crown width of an open-grown tree of the same species and same diameter at breast height as the subject tree. The results of this coordinate generation procedure are compared with mapped stem data from nine natural stands of Douglas-fir at two ages by the use of a transformed Ripley's K(d) function. The results of this comparison indicate that the proposed method, based on complete tree lists, successfully replicated the spatial patterns of the trees in all nine stands at both ages and over the range of distances examined. On the basis of these findings and the procedure's ability to model effects through time, the nonsimple sequential inhibition process has been chosen to generate tree coordinates in the VIZ4ST computer program for displaying forest stand structure in naturally regenerated young Douglas-fir stands. For. Sci. 44(1):125-133.

Keywords: Nonsimple sequential inhibition process; Pseudotsuga menziesii; Ripley's K(d); stand visualization models; tree coordinates

Document Type: Journal Article

Affiliations: Assistant Professor, Department of Forest Resources, College of Forestry, Oregon State University, Corvallis, OR 97331. Phone: (541) 258-6801;, Fax: (541) 737-3049

Publication date: February 1, 1998

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