Nigro Statusandtrends FEAM 0
Forest Ecology and Management 441 (2019) 20–31 Contents lists available at ScienceDirect Forest Ecology and Management journal homepage: www.elsevier.com/locate/foreco Status and trends of fire activity in southern California yellow pine and T mixed conifer forests ⁎ Katherine Nigroa,b, , Nicole Molinaric a University of California Santa Barbara, Santa Barbara, CA 93106, United States b Colorado State University, Forest and Rangeland Stewardship, 200 W. Lake St, 1472 Campus Delivery, Fort Collins, CO 80523-1472, United States c USDA Forest Service, Pacific Southwest Region, Los Padres National Forest, 6750 Navigator Way, Suite 150, Goleta, CA 93117, UnitedStates ARTICLE INFO ABSTRACT Keywords: Frequent, low to moderate severity fire in mixed conifer and yellow pine forests of California played anintegral Southern California role in maintaining these ecosystems historically. Fire suppression starting in the early 20th century has led to Fire return interval altered fire regimes that affect forest composition, structure and risk of vegetation type conversion following Burn severity disturbance. Several studies have found evidence of increasingly large proportions and patches of high severity Fire size fire in fire-deprived conifer forests of northern California, but few studies have investigated the impactsoffire Natural range of variation suppression on the isolated forests of southern California. In this study, spatial data were used to compare the Yellow pine Mixed conifer current fire return interval (FRI) in yellow pine and mixed conifer forests of southern California tohistorical conditions. Remotely sensed burn severity and fire perimeter data were analyzed to assess changes inburn severity and fire size patterns over the last 32–100 years.
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