Figure 4

Combined number of seeds of the three dominant shrub genera (Ceanothus, Arctostaphylos, and Prunus) in six layers within unburned and prescribed burned plots at two sites in northern California: (A) McCloud and (B) Jennie Springs. Layer 2+ is the upper duff from the top of the duff to 2 cm above mineral soil, layer 2-0 is the lower duff from 2 cm down to mineral soil, layer 0–2 is the top 2 cm of mineral soil, layer 2–4 is from 2 cm to 4 cm deep, layer 4–6 is from 4 cm to 6 cm deep, layer 6–10 is from 6 cm to 10 cm deep. Unburned plots at the McCloud site were sampled 28 days prior and burned plots sampled four days after the burn. All sampling at Jennie Springs was done four years after burning.