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Susceptibility of Red-Cockaded Woodpecker Colony Areas to Southern Pine Beetle Infestation in East Texas

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Seven red-cockaded wood-pecker (Picoides borealis) colonies and stands within a one-quarter mile radius were hazard-rated for susceptibility to the southern pine beetle (Dendroctonus frontalis Zimm.). Individual colonies generally were ranked low to moderate hazard using the Texas Hazard system and moderate hazard using the National Forest Risk system. Within one-quarter mile of the colonies, 28% of the stands were low hazard, 25% moderate, 0.3% high and 7.5% extreme with Texas Hazard. Four percent were low hazard, 52% moderate, and 6% high with National Forest Risk. Moderate to extreme hazard stands within one-quarter mile of the colonies could increase the probability of beetle infestation in these areas, thus threatening foraging areas and individual colony trees. Documented bark beetle activity within colonies did not correspond directly with hazard ratings, suggesting that development of a different model may be needed for these RCW colonies to incorporate stand characteristics, disturbances, cavity tree condition, and other bark beetle species. South. J. Appl. For. 15(3):158-162.
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Document Type: Journal Article

Affiliations: Texas Forest Service, Conroe, Texas

Publication date: 01 August 1991

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