Characteristics Of Endemic-Level Mountain Pine Beetle Populations In South-Central Wyoming... Research Paper RMRS-RP-13... U.S. Department Of Agriculture... December 1998 PDF Download
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Author: United States. Forest Service
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Category :
Languages : en
Pages :
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Author: United States. Forest Service
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Category :
Languages : en
Pages :
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Author: Dale L. Bartos
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Category : Forests and forestry
Languages : en
Pages : 12
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This study was conducted to evaluate the dynamics of endemic populations of mountain pine beetle (Dendroctonus ponderosae Hopkins). In addition, we extended the geographical range of an existing data base recorded in Utah with similar data from Wyoming. This work was accomplished in lodgepole pine (Pinus contorta Dougl. Var. latifolia Engelm.) stands on the Medicine Bow National Forest in south-central Wyoming. Thirty-eight variable-radius paired plots (BAF 10) were measured during the summer of 1987. Host-tree condition and mountain pine beetle infestation characteristics were determined from currently and previously infested trees. Presence and severity of Armillaria root disease and stem pathogens was determined. Tree condition and infestation patterns were similar at this site to those found in earlier studies. Trees selected by endemic mountain pine beetle populations were infested with Comandra blister rust (Cronartium Comandra PK) and root disease (Armillaria spp.). Host-tree condition and mountain pine beetle infestation patterns recorded in this study parallel those identified earlier in Utah and will help land managers identify trees to cut to reduce stand hazard to mountain pine beetle infestation.
Author: Dale L. Bartos
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Category : Insect populations
Languages : en
Pages : 0
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Author: Claudia M. Regan
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Category : Biotic communities
Languages : en
Pages : 546
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Vegetation at the Glacier Lakes Ecosystem Experiment Site, a 600 ha research site at 3200 to 3500 m elevation in the Snowy Range of southeastern Wyoming, was categorized and described from an intensive sampling of species abundances. A total of 304 vascular plant taxa were identified through collection and herbarium documentation. Plots with tree species were separated from those without tree species for ordination and classification analyses. Detrended correspondence analysis was used to order plots along major axes of composition variation, which are inferred moisture and topographic gradients. Cluster analysis was used to categorize plots based on composition similarity. The resulting groups were named according to species dominants. We identified and described in detail 4 meadow, 4 thicket or scrub, 3 krummholz, and 2 forest plant associations.
Author:
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Category : Forests and forestry
Languages : en
Pages : 138
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Author: Borys M. Tkacz
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Category : Lodgepole pine
Languages : en
Pages : 8
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Author: Gordon Moore
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Category : Southern pine beetle
Languages : en
Pages : 16
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Author: David C. Chojnacky
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Category : Mountain pine beetle
Languages : en
Pages : 16
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Two empirical methods for rating susceptibility of mountain pine beetle attack in ponderosa pine were evaluated. The methods were compared to stand data modeled to objectively rate each sampled stand for susceptibly to bark-beetle attack. Data on bark-beetle attacks, from a survey of 45 sites throughout the Colorado Plateau, were modeled using logistic regression to estimate the probability of attack on individual trees from tree and stand variables. The logistic model allowed flexibility to easily scale results up to a stand level for comparison to the empirical methods. The empirical method, developed by Munson and Anhold, most closely correlated to the logistic regression results. However, the Munson/Anhold method rated all 45 study sites as either moderately or highly susceptible to bark-beetle attack, which raises concern about its lack of sensitivity. Future work on evaluating risk of bark-beetle impact should consider more than stand characteristics.
Author: J. M. Schmid
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Category : Black Hills National Forest (S.D. and Wyo.)
Languages : en
Pages : 16
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Author: Gene D. Amman
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Category : Beetles
Languages : en
Pages : 12
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