Journal
INTERNATIONAL JOURNAL OF WILDLAND FIRE
Volume 15, Issue 1, Pages 113-119Publisher
CSIRO PUBLISHING
DOI: 10.1071/WF05001
Keywords
aerial photography; fire probability; ignition; perennials; soil cryptogams
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Fire risk in western North America has increased with increasing cover of Bromus tectorum, an invasive alien annual grass. The relationship between B. tectorum cover and fire risk was determined in a historically burned Artemisia tridentata-Poa secunda shrub-steppe community where B. tectorum cover ranged from 5 to 75%. Fire risk ranged from similar to 46% with an average of 12% B. tectorum cover to 100% when B. tectorum cover was greater than 45% based on prediction confidence limits. Reflectance of the green and red bands of aerial photographs were related to senescent B. tectorum cover to create fine resolution B. tectorum cover and fire risk maps. This assessment technique will allow land managers to prioritize lands for restoration to reduce fire risk in the shrub-steppe.
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