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 following.

Action Category

Thin trees within forests: effects on young trees

Action Link
Forest Conservation
  1. Thin trees within forests: effects on young trees

    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.


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