10 COLLEGE OF FORESTRY 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.”
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