[1] Univ Calif Berkeley, Dept Environm Sci Policy & Management, Berkeley, CA 94720 USA
[2] US Forest Serv, USDA, Pacific Southwest Res Stn, Davis, CA USA
[3] Univ Calif Berkeley, Ctr Fire Res & Outreach, Coll Nat Resources, Berkeley, CA 94720 USA
[4] Univ Delaware, Dept Plant & Soil Sci, Newark, DE 19717 USA
[5] Univ Calif Berkeley, Ctr Forestry, Georgetown, CA USA