Guidelines for estimating the survival of fire-damaged trees in California /

Wagener, Willis W.

doi:10.5962/bhl.title.80499

Cited by 36 publications

(25 citation statements)

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“…A large body of research describing the complex interactions among fire injuries and tree survival exists, and has been used in the development of predictive models for a variety of tree species. Tree size and heat-caused crown and cambium injury have been found to be the most significant factors for predicting tree mortality following fire, with the levels varying among tree species (Wagener 1961;. Several studies also attributed observed bark beetle attacks after fire to an increase in delayed tree mortality (Peterson and Arbaugh 1986;Bradley and Tueller 2001;.…”

Section: Introductionmentioning

confidence: 98%

Predicting postfire Douglas-fir beetle attacks and tree mortality in the northern Rocky Mountains

Hood

Bentz

2007

Can. J. For. Res.

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Douglas-fir (Pseudotsuga menziesii (Mirb.) Franco) were monitored for 4 years following three wildfires. Logistic regression analyses were used to develop models predicting the probability of attack by Douglas-fir beetle (Dendroctonus pseudotsugae Hopkins, 1905) and the probability of Douglas-fir mortality within 4 years following fire. Percent crown volume scorched (crown scorch), cambium injury, diameter at breast height (DBH), and stand density index for Douglas-fir were most important for predicting Douglas-fir beetle attacks. A nonlinear relationship between crown scorch and cambium injury was observed, suggesting that beetles did not preferentially attack trees with both maximum crown scorch and cambium injury, but rather at some intermediate level. Beetles were attracted to trees with high levels of crown scorch, but not cambium injury, 1 and 2 years following fire. Crown scorch, cambium injury, DBH, and presence/absence of beetle attack were the most important variables for predicting postfire Douglas-fir mortality. As DBH increased, the predicted probability of mortality decreased for unattacked trees but increased for attacked trees. Field sampling suggested that ocular estimates of bark char may not be a reliable predictor of cambium injury. Our results emphasize the important role of Douglas-fir beetle in tree mortality patterns following fire, and the models offer improved prediction of Douglas-fir mortality for use in areas with or without Douglas-fir beetle populations.Résumé : Des douglas de Menzies (Pseudotsuga menziesii (Mirb.) Franco) ont été suivis pendant 4 ans à la suite de trois incendies de forêt. Des analyses de régression logistique ont été utilisées pour élaborer des modèles de prédiction de la probabilité d'une attaque du dendroctone du douglas (Dendroctonus pseudotsugae Hopkins, 1905) et de la probabilité que le douglas de Menzies meure dans les quatre années suivant un feu. Le volume de cime roussi, les dommages au cambium, le diamètre à hauteur de poitrine (DHP) et l'indice de densité du peuplement de douglas de Menzies étaient les variables les plus importantes pour prédire les attaques du dendroctone. Une relation non linéaire entre le roussissement de la cime et les dommages au cambium a été observée, ce qui signifie que les dendroctones n'attaquent pas de préférence les arbres qui ont à la fois le maximum de dommages à la cime et au cambium mais plutôt un niveau intermédiaire quelconque. Les dendroctones étaient attirés par les arbres avec un degré élevé de roussissement de la cime mais sans dommages au cambium, un et 2 ans après un feu. Le roussissement de la cime, les dommages au cambium, le DHP et la présence ou l'absence d'attaques du dendroctone étaient les variables les plus importantes pour prédire la probabilité que le douglas de Menzies meure après un feu. La probabilité estimée de mortalité diminuait avec l'augmentation du DHP chez les arbres qui n'avaient pas été attaqués alors que la probabilité qu'un arbre meure augmentait avec l'augmentation du DHP chez...

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Section: Introductionmentioning

confidence: 98%

Predicting postfire Douglas-fir beetle attacks and tree mortality in the northern Rocky Mountains

Hood

Bentz

2007

Can. J. For. Res.

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“…The small diameter twigs and small buds of most shrub species make them fairly susceptible to fire. For conifers, long needles provide more initial protection to buds than short needles that leave the bud directly exposed to heat from the fire (Wagener 1961). Whether leaves are deciduous or evergreen affects crown survival in that deciduous trees are much less susceptible during the dormant than growing season.…”

Section: Aerial Crown Mortalitymentioning

confidence: 99%

“…Species of trees that self-prune their dead lower branches, such as red pine, are less likely to have a fire carry into their crowns (Keeley and Zedler 1998). Small buds are more susceptible to lethal heating than large buds because of their small mass (Byram 1948;Wagener 1961). Large buds, such as on some of the pines, are more heat resistant.…”

Section: Aerial Crown Mortalitymentioning

confidence: 99%

Wildland fire in ecosystems: effects of fire on flora

Brown¹,

Smith²

2000

300

156

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_____________________________________This state-of-knowledge review about the effects of fire on flora and fuels can assist land managers with ecosystem and fire management planning and in their efforts to inform others about the ecological role of fire. Chapter topics include fire regime classification, autecological effects of fire, fire regime characteristics and postfire plant community developments in ecosystems throughout the United States and Canada, global climate change, ecological principles of fire regimes, and practical considerations for managing fire in an ecosytem context.

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“…The result of crown scorching is usually more severe during the active growth period early in the summer than later when growth has slowed, terminal buds have formed, and a food reserve is being accumulated (Wagener 1955(Wagener , 1961. Likewise, crown scorching that occurs in early spring, before or immediately after bud burst, often results in minimum damage to the tree.…”

Section: Heat Effects and Insect Attackmentioning

confidence: 99%

Fire ecology of western Montana forest habitat types

Fischer¹,

Bradley²

1987

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Guidelines for estimating the survival of fire-damaged trees in California /

Cited by 36 publications

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Predicting postfire Douglas-fir beetle attacks and tree mortality in the northern Rocky Mountains

Predicting postfire Douglas-fir beetle attacks and tree mortality in the northern Rocky Mountains

Wildland fire in ecosystems: effects of fire on flora

Fire ecology of western Montana forest habitat types

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