Western larch (Larix occidentalis) is Washington state’s most fire-resistant conifer. A highly fire-adapted, deciduous conifer that naturally occurs in parts of the Columbia River Basin in the Northwest United States and Southwest Canada, the western larch is also known for its well-studied medicinal properties and resistance to insect and disease infestations, compared to other Northwest conifer species. Unfortunately, over a century of fire suppression, timber harvesting, and the interruption of Native American land stewardship have led to a significant decline of western larch populations across the Northwest.

Additionally, limited seed production, shade intolerance, and sensitivity to drought challenge the natural re-establishment of western larch trees. Understanding how a warmer climate and frequent, severe wildfires affect its ability to regrow is crucial for restoring resilient forest systems. The objective of Priscilla’s research is to support forest managers at the Confederated Tribes of the Colville Indian Reservation and inform restoration responses and forest adaptation, amidst climate change and the wildfire crisis. Using remote sensing data and data collected from ground surveys, Priscilla will identify the environmental conditions conducive to successful western larch establishment, while accounting for wildfire activity and climatic factors.

The resulting model will show the likelihood of western larch stands’ resistance to fire in a given area under different climate scenarios, identifying areas where reforestation may or may not be suitable. Priscilla plans to share her findings with project partners through workshops and reports, ensuring that the insights gained can directly inform management practices and decision-making in the region.