Background. Prescribed burning is a widely-used fire management strategy for maintaining socioeconomic and ecological resilience by mitigating the impacts of wildfires. Monitoring the effectiveness of prescribed burns on future fire spread, however, is challenged by limited data availability and quality.
In this study, the authors characterized historical fire return intervals, seasonality, and relationships with local and regional factors for 13 sites representative of southwestern Oregon dry forests on ridges and midslopes in the Rogue Basin of the Klamath Ecoregion. They used dendrochronology (cross-dated fire-scars from trees) to develop fire histories. Then using a systematic literature review, the authors were able to link local fire histories to a regional dataset and evaluate the data relative to more intensively studied conifer/hardwood forest types in California.
In this study, researchers measured vegetation structure and fuel moisture (pre-burn), weather conditions, belowground heat dosages, and peak temperatures (during the burn), and burn severities and unburned refugia (post-burn) for paired morning and afternoon prescribed burns at each of ten prairie sites throughout the south Puget Sound in 2014.