Restoring Historical Forest Conditions in a Diverse Inland Pacific
Restoring historical forest conditions in a diverse inland Pacific Northwest landscape 1, 1 2 1 JAMES D. JOHNSTON, CHRISTOPHER J. DUNN, MICHAEL J. VERNON, JOHN D. BAILEY, 1 3 BRETT A. MORRISSETTE, AND KAT E. MORICI 1College of Forestry, Oregon State University, 140 Peavy Hall, 3100 SW Jefferson Way, Corvallis, Oregon 97333 USA 2Department of Forestry and Wildland Resources, Humboldt State University, 1 Harpst Street, Arcata, California 95521 USA 3Department of Forest and Rangeland Stewardship, Colorado Forest Restoration Institute, Colorado State University, 1472 Campus Delivery, Fort Collins, Colorado 80523 USA Citation: Johnston, J. D., C. J. Dunn, M. J. Vernon, J. D. Bailey, B. A. Morrissette, and K. E. Morici. 2018. Restoring historical forest conditions in a diverse inland Pacific Northwest landscape. Ecosphere 9(8):e02400. 10.1002/ecs2.2400 Abstract. A major goal of managers in fire-prone forests is restoring historical structure and composition to promote resilience to future drought and disturbance. To accomplish this goal, managers require infor- mation about reference conditions in different forest types, as well as tools to determine which individual trees to retain or remove to approximate those reference conditions. We used dendroecological reconstruc- tions and General Land Office records to quantify historical forest structure and composition within a 13,600 ha study area in eastern Oregon where the USDA Forest Service is planning restoration treatments. Our analysis demonstrates that all forest types present in the study area, ranging from dry ponderosa pine-dominated forests to moist mixed conifer forests, are considerably denser (273–316% increase) and have much higher basal area (60–176% increase) today than at the end of the 19th century.
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