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 National Park, WY. Tech. Rep. NPS/NRYELL/NRTR-93/XX 

 April 1994. Denver, CO: U.S. Department of the Interior, 

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 259-271. 



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Rasmussen, Lynn A.; Amman, Gene D.; Vandygriff, James C; Oakes, Robert D.; Munson, 

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Surveys of bark beetle and wood borer infestation in the Greater Yellowstone Area were 

 conducted from 1991 through 1993 to determine the effect of delayed tree mortality on 

 mosaics of fire-killed and green tree stands, the relationship between fire injury and infes- 

 tation, and the effect of insect buildup in fire-injured trees on infestation rates for uninjured 

 trees. Fire injury accounted for more delayed mortality than insect infestation, but both types 

 of mortality greatly altered the mosaics immediately apparent after the 1988 fires. The high 

 level of infestation suggests that insects built up in fire-injured trees and then caused in- 

 creased infestation of uninjured trees. 



Keywords: fire injury, Yellowstone fires, Douglas-fir, lodgepole pine, Engelmann spruce, 

 whitebark pine, subalpine fir, mosaic patterns 



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