Predicting Recovery of Tanoak (Lithocarpus densiflorus) and Pacific Madrone (Arbutus menziesii) after Cutting or Burning
The development of 157 tanoak [Lithocarpus densiflorus(Hook. and Am.) Rehd.] and 130 Pacific madrone (Arbutus menziesiiPursh) sprout-clumps 1 to 6 yr after cutting or burning was studied on a range of sites in southwest Oregon. The width and area of sprout-clumps originating from trees ≥ 2-cm stem diameter at 1.4-m height of both species was related to the size of the parent stem and time since cutting (tanoak, r2= 0.77 and 0.75; Pacific madrone, r2= 0.84 and 0.83). The sprouting capacity of tanoak develops slowly, and 5 to 6 yr after cutting, sprout-clumps produced by small tanoak 40 to 50 yr old averaged only 37 cm in diameter. Prediction equations, along with stem-diameter distributions of these species in forest stands, can be used to estimate hardwood foliar cover up to 6 yr after cutting.