n. 1) A mathematical expression of fire occurrence or rate, such as the average time interval between successive fires or the number of fires within a specific period of time; 2) A generic term referring to general fire occurrence or rate.
Fire history research documenting fire frequency and fire severity prior to Euro-American settlement is important for understanding the natural role of fire in fire-adapted ecosystems. For example, fire frequency data help managers plan for the occurrence of fires in wilderness and parks where wildland fire use is allowed under prescription. Managers can also use such fire regime information to plan for and predict fire occurrence in and near the wildland-urban interface and other landscapes. For further discussion, see Agee 1993, McPherson and others 1990, and Stokes and Dieterich 1992.