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Fire Regime - Report

Fire regimes of greasewood shrubland communities

Written
February, 2026
Fire Regime Type
Report

U.S. Department of Agriculture, Forest Service, Missoula Fire Sciences Laboratory. 2026. Fire regimes of greasewood shrubland communities. In: Fire Effects Information System, [Online]. U.S. Department of Agriculture, Forest Service, Rocky Mountain Research Station, Missoula Fire Sciences Laboratory (Producer). Available: https://research.fs.usda.gov/feis/fire-regimes/greasewood-shrublands

A complete Fire Regime Synthesis for greasewood shrubland communities has not yet been published in the Fire Effects Information System. However, LANDFIRE succession modeling of greasewood shrubland Biophysical Settings (BpS) provides estimates of fire regime characteristics (see LANDFIRE Biophysical Settings section). Figure 1 shows where these BpSs occur.

A map showing the distribution of greasewood shrubland communities in the western U.S.
Photo Credit
Map based on the LANDFIRE (2020) BpS data layer [1].

Figure 1—Land cover distribution of greasewood shrubland Biophysical Settings (BpS).

2020 LANDFIRE Biophysical Settings — Historical Fire Regime Characteristics
Biophysical SettingMean Fire Interval (years)Fire Severity Percent (%)
CodeFire Regime GroupLowMixedReplacementAllLowMixedReplacement
Series 11530 - Inter-Mountain Basins Greasewood Flat
11530_28V-A20420400100
11530_16_23_24_25_27V-A20820800100
11530_7_8_9V-B1019101900100
11530_20_22_29_30V-A20720700100
11530_6_10_12_13_17_18_19_21V-B1024102400100
Summary
Minimum20420400100
Maximum1024102400100
Mean53253200100
Median20820800100
Percentage of fires in 3 fire severity classes, derived from LANDFIRE succession modeling. Replacement-severity fires cause >75% kill or top-kill of the upper canopy layer; mixed-severity fires cause 26%-75%; low-severity fires cause <26%.
LANDFIRE. 2020. Biophysical settings models and descriptions, [Online]. Washington, DC: U.S. Department of Agriculture, Forest Service; U.S. Department of the Interior; U.S. Geological Survey; Arlington, VA: The Nature Conservancy, (Producers). Available: https://www.landfirereview.org/search.php [96496]

1. LANDFIRE. 2020. Biophysical settings layer, CONUS (LANDFIRE 2.2.0). In: LANDFIRE download data mosaic products, [Online]. U.S. Department of the Interior, Geological Survey; U.S. Department of Agriculture (Producer). Available: https://www.landfire.gov/version_download.php [2023, June 20]. [98050]

2. LANDFIRE. 2020. Biophysical settings models and descriptions, [Online]. Washington, DC: U.S. Department of Agriculture, Forest Service; U.S. Department of the Interior; U.S. Geological Survey; Arlington, VA: The Nature Conservancy, (Producers). Available: http://www.landfirereview.org/search.php [2022, February 2]. [96496]

Last updated April 28, 2026