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Providing evidence to improve practice

Individual study: Removal of encroaching pine and fir trees encourages regeneration of trembling aspen Populus tremuloides in Lassen National Forest, California, USA

Published source details

Jones B.E., Rickman T.H., Vazquez A., Sado Y. & Tate K.W. (2005) Removal of encroaching conifers to regenerate degraded sspen stands in the Sierra Nevada. Restoration Ecology, 13, 373-379


This study is summarised as evidence for the intervention(s) shown on the right. The icon shows which synopsis it is relevant to.

Thin trees within forests: effects on young trees Forest Conservation

A replicated, controlled study in 1999-2003 in temperate mixed forest in California, USA (Jones et al. 2005) found that thinning by removal of all conifers increased trembling aspen Populus tremuloides density. Total aspen density (stems/ha) was higher in thinned (16,000) than in unthinned plots (6,000). Data were collected in 2003 in 2-4 transects (30.5 × 1.8 m) in each site (~1.7 ha) of four thinned (all conifers removed in 1999) and unthinned pairs.