Properties of Long-Unburned Duff Mounds in an Old-Growth Ponderosa Pine Stand-Implications for Restoration Burning

Implications for Restoration Burning

Emily C. Garlough ； Christopher R. Keyes

《Advances in Forestry Letters》 2卷4期 (2013/12) Pp. 57-60

並列摘要

In fire-excluded old-growth forests, excessive duff consumption from smoldering combustion at the base of trees can result in injury and mortality. In this study, duff properties that influence consumption-mineral content, bulk density, and depth-were analyzed within and among duff mounds in a long-unburned ponderosa pine (Pinus ponderosa C. Lawson) stand. For each property, a substantial proportion of variance was attributable to differences among duff mounds and between upper and lower duff horizons (all P＜0.05), but no property differed between uphill and downhill sampling positions (all P＞0.05). A positive but weak relationship between tree size and duff depth was observed (r^2=0.288; P＜0.0001). Results can be used by fire managers to develop protocols for efficient and effective preburn duff mound sampling, in order to better protect large trees in old-growth stands from excessive duff consumption.

並列關鍵字

Ecological Restoration ； Old-Growth Forest ； Pinus Ponderosa ； Prescribed Fire ； Fire Ecology ； Fire Effects ； Klamath Mountains