Table 3 Results of mixed model analyses of variance for three shrub genera found in the seed bank at 22 unburned forested sites in northern California. Average seed density (seeds m⁻²) as the dependent variable and independent variables describing stand structure and site environment. Heat load is a relative index calculated from aspect, slope, and latitude (McCune and Keon 2002). Stand age is estimated as the average age of the three oldest trees sampled at each site. “Fir basal area (%)” is the percentage of basal area composed of fir species, and “Broadleaf basal area (%)” is the percentage of basal area composed of broad-leaved tree species. Numbers for variables where the relationship with seed density was negative are shown in bold.

From: Shrub Seed Banks in Mixed Conifer Forests of Northern California and the Role of Fire in Regulating Abundance