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Project ID: 06-2-1-10

Year: 2006

Date Started: 07/07/2006

Date Completed: 03/05/2010

Title: Effect of Season and Interval of Prescribed Burns in a Ponderosa Pine Ecosystem on Tree Growth and Understory Vegetation

Project Proposal Abstract: Prescribed burning is currently used in many forests to restore fuel loads to historic levels and return forests to pre-fire suppression burn intervals. A study is currently underway in the southern Blue Mountains of eastern Oregon that is examining the effects of season of burn and fire return interval on forest growth, insect and disease mortality, understory vegetation and fuel consumption. This project has 5 treatments: spring burning at 5-year intervals, spring burning at 15-year intervals, fall burning at 5-year interval, fall burning at 15-year interval, and a no-burn control replicated in six stands. In addition, nested treatments examining the interaction of livestock grazing and prescribed fire on understory vegetation were established in 2002 prior to the reburn. To date, two of the 5-year interval burns have been completed on all six stands in the study: they were burned fall or spring of 1997/1998 (12 units) and reburned fall or spring of 2002/2003 (12 units). The objective of this proposal is to continue this unique study by adding another iteration of the 5-year burn interval and to then observe the effects of repeated burns on tree growth, residual fuels, understory vegetation, and incidence of disease caused tree mortality.

Principal Investigator: Walter G. Thies

Agency/Organization: Forest Service

Branch or Dept: PNW-Forestry Sciences Lab-Corvallis

Other Project Collaborators




Branch or Dept

Co-Principal Investigator

Douglas J. Westlind

Forest Service

PNW-Forestry Sciences Lab-Corvallis

Federal Cooperator

Becky K. Kerns

Forest Service

PNW-Forestry Sciences Lab-Corvallis

Project Locations

Fire Science Exchange Network

Northern Rockies


There are no project locations identified for this project.

Project Deliverables

Final Report view or print

("Results presented in JFSP Final Reports may not have been peer-reviewed and should be interpreted as tentative until published in a peer-reviewed source.")

  ID Type Title
view or print   2862 Journal Article Science Findings
view or print   2861 Journal Article Ecosphere
    5325 Invited Paper/Presentation Post-Fire Cattle Grazing in Ponderosa Pine Forests
    5326 Conference/Symposia/Workshop Ponderosa Pine Forest Understory Response to Post-Fire Cattle Grazing
    5487 Conference/Symposia/Workshop Forest Understory Response to Prescribed Burning and Cattle Grazing

Supporting Documents

There are no supporting documents available for this project.

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