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Title: Thinning in mature eastern white pine: 43-year case study

Author: Anderson, Paul D.; Zasada, John C.; Erickson, Glen W.; Zasada, Zigmond A.;

Date: 2002

Source: The Forestry Chronicle 78(4):539-549

Publication Series: Scientific Journal (JRNL)

Description: A white pine (Pinus strobus L.) stand at the western margin of the species range, approximately 125 years of age at present, was thinned in 1953 from 33.5 m2 ha-1 to target residual basal areas of 18.4, 23.0, 27.5. and 32.1 m2 ha-1. Repeated measurement over the following 43-years indicated that the greatest total volume production and the greatest number of large diameter trees occurred in the unit of highest residual density. Over time, the distribution of stems was predominantly random although mortality between 1979 and 1996 resulted in a tendency for clumping in the 23.0 and 27.5 m2 ha-1 treatments. DNA analysis indicated that thinning intensity had little effect on the genetic diversity of residual white pine. This study suggests that mature white pine stands in northern Minnesota may be managed at relatively high densities without loss of productivity. However, regardless of overstory density, there was little or no white pine regeneration occurring in this stand.

Keywords: thinning, growth, genetic diversity, molecular markers, spatial pattern, regeneration

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Citation:


Anderson, Paul D.; Zasada, John C.; Erickson, Glen W.; Zasada, Zigmond A. 2002. Thinning in mature eastern white pine: 43-year case study. The Forestry Chronicle 78(4):539-549

 


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