"Stand Composition and Development Stage Affect Fuel Characteristics of" by Kristin A. Nesbit, Larissa L. Yocom et al.
 

Aspen Bibliography

Stand Composition and Development Stage Affect Fuel Characteristics of Quaking Aspen Forests in Utah, USA

Document Type

Article

Journal/Book Title/Conference

Canadian Journal of Forest Research

Volume

55

Publisher

Canadian Science Publishing

First Page

1

Last Page

13

Publication Date

1-2025

Abstract

In western North America, quaking aspen stands (Populus tremuloides Michx.) have predominantly been described as low flammability, “fireproof” forests, but the specific relationship between aspen stand composition, fuel characteristics, and potential fire behavior is not fully understood. We investigated surface and canopy fuel characteristics in 80 aspen stands in Utah, U.S., that spanned gradients of tree species composition from aspen to conifer dominance and stand development from early to late stages. We quantified fuel type and load, measured fuel moisture content in representative stands across two summer seasons, and modeled flame lengths in each stand. Fuel type and load varied greatly across stands, though late development, conifer-dominated stands had significantly higher (∼2–5 times) fine dead woody and litter load and significantly lower (∼2–5 times) live understory herbaceous load compared to pure aspen stands. Fuel moisture content did not vary by stand type. Modeled flame lengths were lowest in pure aspen stands, and flame lengths increased linearly with decreasing aspen composition, suggesting that potential surface fire behavior increases as a seral aspen stand progresses through succession to conifer dominance.

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