Tree Ring Lab studies fire history through dendrochronology
The College of Forestry’s Tree Ring Lab takes a deep dive into learning from tree rings—through the science of dendrochronology. By analyzing tree rings, lead scientist Andrew Merschel, Oak Ridge Institute for Science and Education (ORISE) postdoctoral scholar with the U.S. Forest Service and Oregon State University, is uncovering important new information about fire history, forest stand development and Indigenous burning that informs our understanding of forest ecosystems, the complexity of old-growth development and how we might better steward the diverse forests of the Pacific Northwest.
Merschel works with a large team of management collaborators, science partners and students to collect, process and interpret the stories trees tell through their rings and wood. Associate Professor Meg Krawchuk and Amanda Brackett co-direct the lab and all three work together to support the research, training and teaching opportunities the lab provides.
“This research allows us to travel back in time and provide evidence of historical fire regimes that created the mature and old-growth forests we value so much today,” said Merschel. “There’s a surprising amount of fire in our forests documented by tree rings—it’s the basic ecology work that I wish we would’ve been doing decades ago to inform management of our forest ecosystems today.”
Graduate students in the Tree Ring Lab are applying this research in various ways. Ph.D. student Jennifer Bailey Guerrero is studying the development of marbled murrelet nesting habitat in relationship to fire. Sven Rodne’s master’s degree research involves historical stand and fire reconstructions in southwest Oregon. Charles Drake, who is also pursuing his master’s degree, is looking at historical fire throughout the McDonald and Dunn Research Forests. A team of undergraduate students and field technicians are critical to collecting and processing samples, and are aspiring tree ring scientists, ecologists and practitioners of the future.
“Tree rings provide a shared understanding of the history of forests, people, fire, climate, wind, water, management—it’s all there,” said Krawchuk. “When you walk into a room with a cross section of tree rings and their stories, it opens up a rare opportunity to talk through ideas and worldviews about trees and forests that draws people in and brings them together in an astonishing way.”
Reconstructing historical, cultural fire regime in Oregon’s Coast Range
Glenn Jones, a master’s student in the department of forest engineering, resources and management, is an Oglala Lakota descendent, an enrolled member of the Hoopa Valley Tribe of rural Northern California, and an active prescribed fire/cultural fire practitioner. Jones is working with Assistant Professor Chris Dunn to reconstruct a historical, cultural fire regime in the east slope of the Central Oregon Coast Range. Through a cultural lens, Jones sees the past seven generations (approx. 150 years) of land management as the crux of contemporary forest conditions. By better understanding forest conditions of our ancestral past, through Indigenous Knowledge and fire history, it informs our future seven generations’ land management strategies in forests that are threatened by contemporary wildfires, climate change and contain critical habitat for culturally and ecologically important species. Funded by the Seeds of Success Bureau of Land Management grant, Jones will be working in conjunction with the Confederated Tribes of Coos, Lower Umpqua and Siuslaw Indians of Oregon and BLM lands to carry out his research.
New dual degree to focus on wildland-urban interface issues
Assistant Professor Chris Dunn is working on a new dual degree program with Erica Fischer, an associate professor in the College of Engineering, to train the next generation of wildland-urban interface researchers. It aims to bridge the gap between modeling and mitigating wildfire in natural landscapes and the built environment as more fires intrude upon communities. He is also part of a collaborative spatial fire planning process across the Pacific Coast states that bring partners, stakeholders and Tribes together to pre-plan wildfire response to be more proactive instead of reactive. A third project takes a critical look at using prescribed and cultural fire in recently burned areas to maintain the reduced risk, while protecting recovering areas from a reburn fire.
Assessing post-fire regeneration after the 2020 Holiday Farm Fire
John Bailey, professor of silviculture and fire management, is evaluating post-fire regeneration and recovery four years after the Holiday Farm Fire near Eugene, Oregon, including the potential to use drones to assess forest recovery. He’s also examining the fuel hazard implications of operational silviculture on Humboldt and Mendocino Redwood Companies’ lands in Northern California, and how it can be used to address wildland fire risk. His newly released book “A Walk with Wildland Fire” covers these two topics as well as the dozens of other complex issues surrounding society’s challenging relationship with wildland fire—before, during and after it occurs.
Expanded courses update “fire and restoration” curricular option
Led by Associate Professor John Punches, Guard School is a wildland firefighting course with field sessions on campus and in the OSU McDonald and Dunn Research Forests. Available in credit and non-credit versions, undergraduate and graduate options, and open to OSU students and employees, Guard School utilizes National Wildfire Coordinating Group and Federal Emergency Management Agency curricula and certifies participants as entry level wildland firefighters. Punches also leads the prescribed fire practicum, which teaches students how to use prescribed fire to achieve ecological and fuel reduction objectives, with an emphasis on private land efforts. The course includes student led prescribed fire implementation. Additionally, Associate Professor Daniel Leavell, in collaboration with Professor Mark Hoffman from the College of Health, has created a new Wildland Firefighter Health and Safety course, and work is underway on a Dealing with Stress in Wildland Fire Ecampus course. Funding for these new courses has been provided through a grant from the Bureau of Land Management.
A version of this story appeared in the Fall 2024 issue of Focus on Forestry, the alumni magazine of the Oregon State University College of Forestry.
