Lisa Gill

Contact Info

Department of Geography
The Pennsylvania State University
University Park , PA 16802, United States

Publications in Fire Ecology

Top-Down and Bottom-Up Controls on Fire Regimes along an Elevational Gradient on the East Slope of the Sierra Nevada, California, USA
Pages: 57-75
DOI: 10.4996/fireecology.0503057

Fire is an ecologically significant process in the fire-prone ponderosa pine and mixed conifer forests of the northern Sierra Nevada. Fire regimes are influenced by processes that operate over a range of scales that can be grouped broadly as bottom-up (e.g., topography, forest type) or top-down (e.g., climate variation, human land use) controls. To identify the bottom-up versus top-down controls on fire regimes, we quantified spatial and temporal variation in fire occurrence and extent using fire-scar dendrochronology. Inter-annual climate variability and human land use patterns strongly influenced fire regimes.  [Read More]

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