Probability of ponderosa pine infestation by mountain pine beetle in the Colorado Front Range

Wildfire and spruce beetle outbreak: Simulation of interacting disturbances in the central Rocky Mountains

“…Similarly, beetle activity has been associated with high tree densities in ponderosa pine and Douglas-fir (Pseudotsuga sp.) stands (Negrón et al 2001;Negrón and Popp 2004). Ponderosa pine study plots in Colorado's Front Range infested by mountain pine beetle had significantly higher tree basal area and density (Negrón and Popp 2004).…”

“…stands (Negrón et al 2001;Negrón and Popp 2004). Ponderosa pine study plots in Colorado's Front Range infested by mountain pine beetle had significantly higher tree basal area and density (Negrón and Popp 2004). Douglas-fir beetles (D. pseudotsugae) more often attacked stands containing a high percentage of basal area represented by high densities of Douglasfir and slow growth during the five years prior to attack in Colorado's Front Range (Negrón et al 2001).…”

Modelling natural disturbances in forest ecosystems: a review

“…Forest management, manipulating the latter aspects, significantly affects the susceptibility to insect pests (e.g., Veteli et al, 2006;Fajvan et al, 2008;Jactel et al, 2009). The potential influence of vegetation attributes is best illustrated by tree-based classifications according to a set of discriminating variables, often including stand basal area or specific tree properties (Reynolds and Holsten, 1996;Negrón and Popp, 2004). Logistic regression models are commonly used to predict probabilities (e.g., likelihood of attack) as a function of susceptibility indicators at the stand and tree level (Perkins and Roberts, 2003;Magnussen et al, 2004;Negrón et al, 2008Negrón et al, , 2009).…”

A comprehensive guide to fuels treatment practices for ponderosa pine in the Black Hills, Colorado Front Range, and Southwest

“…5). Several studies have attempted to describe conditions preferred by various insect pests and thus conducive to insect outbreaks (Furniss 1965;Negron and Popp 2004;Reynolds and Holsten 1996;Rudinsky 1966). One product of this research has been infestation hazard models.…”