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Physiological Responses Of Lodgepole Pine Pinus Contorta Douglas Var Latifolia Engelmann To Bark Beetle Attack Dendroctonus Ponderosae Hopkins And Artificial Stress
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Book Synopsis Physiological Responses of Lodgepole Pine (Pinus Contorta Douglas Var. Latifolia Engelmann) to Bark Beetle Attack (Dendroctonus Ponderosae Hopkins) and Artificial Stress by : Ross H. Miller
Download or read book Physiological Responses of Lodgepole Pine (Pinus Contorta Douglas Var. Latifolia Engelmann) to Bark Beetle Attack (Dendroctonus Ponderosae Hopkins) and Artificial Stress written by Ross H. Miller and published by . This book was released on 1984 with total page 254 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Comprehensive Dissertation Index by :
Download or read book Comprehensive Dissertation Index written by and published by . This book was released on 1989 with total page 752 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis American Doctoral Dissertations by :
Download or read book American Doctoral Dissertations written by and published by . This book was released on 1984 with total page 574 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Interactions Among Disturbance Agents in Conifer Forests by : Erinn Nicole Powell
Download or read book Interactions Among Disturbance Agents in Conifer Forests written by Erinn Nicole Powell and published by . This book was released on 2010 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Genetic Variation of Lodgepole Pine (Pinus Contorta Var. Latifolia (Engelm.)) Chemical and Physical Defenses that Affect Mountain Pine Beetle Dendroctonus Ponderosae Attack and Tree Mortality by : Daniel Stephen Ott
Download or read book Genetic Variation of Lodgepole Pine (Pinus Contorta Var. Latifolia (Engelm.)) Chemical and Physical Defenses that Affect Mountain Pine Beetle Dendroctonus Ponderosae Attack and Tree Mortality written by Daniel Stephen Ott and published by . This book was released on 2010 with total page 706 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The current outbreak of mountain pine beetle (MPB), Dendroctonus ponderosae (Coleoptera: Curculionidae), and its fungal complex Grosmannia clavigera has affected ~15 million hectares of lodgepole pine Pinus contorta var. latifolia (Engelm.) in British Columbia. This is of great concern to forest industry in British Columbia but it has provided a rare opportunity to study genetic variation of lodgepole pine defense mechanisms against MPB. Based on a previous study, we selected 45 open-pollinated families from a population of 180 families, with the number of trees per family ranging from 16-26 (for a total of 887 trees) from two 20-year field tests which had undergone attack from MPB. Chemical and physical defensive responses were quantified in response to simulated attack by the MPB fungal complex on these 45 families. These responses included: physical exudation of resin, host compartmentalization response to fungal inoculation, and levels of constitutive and induced resin terpenoids. Further assessments were made for tree height, DBH (diameter at breast height ~1.4 m), bark texture, tree mortality, and MPB presence, attack density, reproduction, and brood development, as well as the presence of hypersensitivity reactions by the tree to MPB."--P. iii.
Book Synopsis Using Pheromones to Protect Heat-injured Lodgepole Pine from Mountain Pine Beetle Infestation by : Gene D. Amman
Download or read book Using Pheromones to Protect Heat-injured Lodgepole Pine from Mountain Pine Beetle Infestation written by Gene D. Amman and published by . This book was released on 1994 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The bark beetle antiaggregative pheromones, verbenone and ipsdienol, were tested in protecting heat-injured lodgepole pine (Pinus contorta Dougl. ex Loud.) from mountain pine beetle (Dendroctonus ponderosae Hopkins) infestation in the Sawtooth National Recreation Area in central Idaho. Peat moss was placed around 70 percent of the basal circumference of lodgepole pines. When the peat moss was ignited, it simulated the smoldering of natural duff, generating temperatures that killed the cambium. The four treatments tested were uninjured tree, heat-injured tree, heat-injured tree treated with verbenone, and heat-injured tree treated with verbenone plus ipsdienol. Treatments were replicated 20 times. Mountain pine beetles were attracted into treatment blocks by placing mountain pine beetle tree baits on metal posts 3 to 5 meters from treated trees. Fisher's Exact Test showed that treatment and beetle infestation were not independent (P
Book Synopsis Remedial Treatment of Lodgepole Pine Infested with Mountain Pine Beetle by : Paul E. Tilden
Download or read book Remedial Treatment of Lodgepole Pine Infested with Mountain Pine Beetle written by Paul E. Tilden and published by . This book was released on 1985 with total page 4 pages. Available in PDF, EPUB and Kindle. Book excerpt: Lindane is registered for remedial control of bark beetles; however, forestry uses are controversial and alternative chemicals are needed. Chlorpyrifos (Dursban 4E), carbaryl (Sevimol 4), and fenitrothion (Sumithion 8E) at 1, 2, and 4 pct active ingredient, and lindane at the registered dosage of 0.6 pct were sprayed on lodgepole pine (Pinus contorts Dougl. var. latvolia Engelm.) bolts infested with mountain pine beetles (Dendroclonus ponderosae Hopkins) in Colorado. Mean survival ratios (n=10) of the proportions of beetles emerging from treated bolts to the proportion emerging from control bolts indicated that chlorpyrifos and fenitrotkion at 2 and 4 pct were about as effective as lindane in reducing emergence.
Book Synopsis Effectiveness of Esfenvalerate, Cyfluthrin, and Carbaryl in Protecting Individual Lodgepole Pines and Ponderosa Pines from Attack by Dendroctonus Spp by :
Download or read book Effectiveness of Esfenvalerate, Cyfluthrin, and Carbaryl in Protecting Individual Lodgepole Pines and Ponderosa Pines from Attack by Dendroctonus Spp written by and published by . This book was released on 1998 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Aboveground and Belowground Carbon Cycle Responses to Bark Beetle Infestation in a Lodgepole Pine Forest by : Bujidmaa Borkhuu
Download or read book Aboveground and Belowground Carbon Cycle Responses to Bark Beetle Infestation in a Lodgepole Pine Forest written by Bujidmaa Borkhuu and published by . This book was released on 2014 with total page 105 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest mortality triggers both immediate and long term changes to water, energy, carbon (C) and nitrogen (N) cycling, but ecosystem-scale feedbacks between aboveground and belowground biogeochemical cycling, microbial biomass, and quality of substrate are poorly understood. This dissertation investigates impacts of beetle-induced ( Dendroctonus ponderosae ) lodgepole pine (Pinus contorta var. latifolia ) forest mortality on soil C pools and fluxes. The study was conducted for a period of five years (2008-2012) in the Medicine Bow National Forest in Wyoming, USA. Treatment sites included four mature stands with different infestation histories (infested in 2007, 2008, and 2009 and uninfested control). Our results suggest that beetle infestation significantly alters forest structure causing more than 80% stand mortality. As mortality increases, water uptake declines, which, in combination with a pulse of needle fall causes the increase in forest floor C biomass (Oi and Oe horizons). Meanwhile, microbial biomass (especially microbial biomass nitrogen) responds within two years following beetle infestation, likely promoted by increased soil organic matter (SOM) mineralization and recovery of understory vegetation. Key environmental factors that influence changes in C pools and fluxes are soil moisture, monthly precipitation and daily maximum photosynthetic photon flux density (PPFD). These factors contribute to the regulation of plant growth and productivity, soil biogeochemistry, and plant-soil interactions. Combining soil biogeochemistry with remote sensing techniques will make further important contributions to precise quantification of C budgets at a regional scale and more robust parameterization of regional/global ecosystem modeling.
Book Synopsis Variance in Growth and Susceptibility to Bark Beetle Attack in Pinus Contorta and Picea Engelmannii by : Rachel N. Strawn
Download or read book Variance in Growth and Susceptibility to Bark Beetle Attack in Pinus Contorta and Picea Engelmannii written by Rachel N. Strawn and published by . This book was released on 2016 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: The bark beetle epidemic across the western United States has claimed millions of hectares of trees. These outbreaks may increase in either duration or intensity in the future as climate change progresses and will impact timber and recreational industries, as well as fire regimes and hydrology. Better understanding of how to manage not only this outbreak, but how to increase the resilience of the forest to future outbreaks is needed. In order to accomplish this we must have a complete understanding of the mechanisms that contribute to the vulnerability of a forest. Previous forest management tried to increase tree growth and defense through thinning to increase resistance to attack. However, recent evidence suggests that beetles prefer larger trees with more phloem food during beetle epidemics. This study sought to determine if growth rate of individual trees affected their susceptibility to beetle attack during an epidemic. In south-eastern Wyoming, Pinus contorta (lodgepole pine) and Picea engelmannii (Engelmann spruce) were cored to determine growth rate over trees' entire lives and light competition was calculated from an index. Crown competition did not contribute to the differences in growth between healthy trees and infected trees. Beetle attacked trees in both species grew faster throughout either a portion of their lives, or the entirety of it. The lodgepole pine stand was uniform in species and age, but trees that were ultimately attacked in this outbreak had a significantly higher growth rate than their healthy counterparts. The Engelmann spruce stand was mixed age and species and beetle attacked trees were older and larger than the healthy samples.
Book Synopsis Decomposition and Carbon Loss in Lodgepole Pine (Pinus Contorta Var. Latifolia) Wood Following Attack by Mountain Pine Beetle (Dendroctonus Ponderosae) by : Benita Kaytor
Download or read book Decomposition and Carbon Loss in Lodgepole Pine (Pinus Contorta Var. Latifolia) Wood Following Attack by Mountain Pine Beetle (Dendroctonus Ponderosae) written by Benita Kaytor and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Mountain pine beetle (MPB)-killed wood remaining on the landscape is predicted to release significant amounts of carbon to the atmosphere as it decays. A lack of field-based wood decomposition data for validating simulation models reduces certainty in such predictions. Using a chronosequence approach, I quantified decomposition of MPB-killed wood to improve decay rate parameters. Changes in carbon density over time and climatic variability showed distinct patterns for bole position categories. Snag carbon density was similar to that of live lodgepole pine, and did not change considerably with time or climatic influences. Decay in suspended boles increased with summer precipitation, but declined with increasing summer temperature, suggesting decay in elevated boles is moisture-limited on warmer sites. Down boles decayed four times faster with increasing proximity to the soil than suspended boles, but did not clearly reflect climatic influences. Position of dead boles appears more important for wood decay than previously thought."--Leaf ii.
Book Synopsis Effects of Regeneration Method on Crop Tree Growth and Stocking by : Tara Rooney
Download or read book Effects of Regeneration Method on Crop Tree Growth and Stocking written by Tara Rooney and published by . This book was released on 2015 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The purpose of this paper is to compare natural and artificial regeneration in Mountain Pine Beetle (MPB, Dendroctonus ponderosae Hopkins) attacked lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) stands in order to determine which stands are healthier. Data was collected from five natural and five artificial blocks, which were all located near Chetwynd, British Columbia in the Sub-Boreal Spruce (SBS) Biogeoclimatic Zone (BEC Zone). Five plots were thrown in each block and the data collected included height, leader length, diameter at breast height (DBH), root collar diameter, and age. The data was analyzed twice using the analysis of variance (ANOVA): first using all the blocks and the second time using three blocks of similar ages from each treatment in order to deal with the confounding effect of age."-- from abstract.
Book Synopsis Modeling Individual Lodgepole Pine Mortality from Mountain Pine Beetle Outbreak in a Spatially Explicit Framework by : Michele Susan Buonanduci
Download or read book Modeling Individual Lodgepole Pine Mortality from Mountain Pine Beetle Outbreak in a Spatially Explicit Framework written by Michele Susan Buonanduci and published by . This book was released on 2019 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt: Outbreaks of native bark beetles (Curculionidae: Scolytinae) are key natural disturbances that shape the structure and function of conifer forests across the northern hemisphere. While drivers of bark beetle outbreaks have been studied extensively at spatial scales ranging from stands to continents, within-stand processes driving individual tree mortality in an outbreak are less well understood. Here we use a spatially explicit long-term monitoring dataset of lodgepole pine (Pinus contorta var. latifolia) forest impacted by a severe mountain pine beetle (Dendroctonus ponderosae) outbreak to explore interactions among fine-scale drivers of beetle-caused tree mortality. Using a hierarchical Bayesian spatial modeling approach, we evaluated whether and how within-stand neighborhood structure and topographic setting interact with tree size to mediate tree level susceptibility to mountain pine beetle outbreak in the Southern Rocky Mountains (USA). We found evidence that both tree growth rate preceding the outbreak and stand structure around the host tree mediated the effect of tree size. However, we did not find evidence that topographic position within a stand mediated the effect of tree size. Mortality probability increased with pre-outbreak growth rate for small to medium sized trees (~10-25 centimeters diameter), but that same effect could not be detected for larger trees. Conversely, mortality probability increased with greater neighborhood density across tree sizes, with the most pronounced effects for medium to large sized trees (~15-30 centimeters diameter). Within-stand topographic variability was not an important predictor of mortality probability; among stands, however, the driest stand conditions experienced the greatest overall mortality. By explicitly considering how natural within-stand heterogeneity mediates individual tree level susceptibility to mountain pine beetle outbreak, our findings bridge an important gap in understanding multi-scale drivers of disturbance dynamics. Identifying factors influencing individual tree mortality in these systems informs our understanding of both the structural development of forest stands and reciprocal feedbacks between stand structure and outbreak dynamics.
Book Synopsis Physiological Stress in Lodgepole Pine as a Precursor for Mountain Pine Beetle Attack by : R. H. Waring
Download or read book Physiological Stress in Lodgepole Pine as a Precursor for Mountain Pine Beetle Attack written by R. H. Waring and published by . This book was released on 1983 with total page 6 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Effects of Host Stored Resources on Bark Beetle-fungal-conifer Interactions by : Eleanor Carol Lahr
Download or read book Effects of Host Stored Resources on Bark Beetle-fungal-conifer Interactions written by Eleanor Carol Lahr and published by . This book was released on 2012 with total page 106 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bark beetles and their associated fungi are among the greatest natural threats to conifers worldwide, but the degree to which host stored resources influence tree-beetle-fungal interactions has not been investigated. In western North America, the range of the mountain pine beetle (Dendroctonus ponderosae) has expanded from lower elevation Pinus contorta (lodgepole pine) forests into high elevation Pinus albicaulis (whitebark pine), a presumed superior host. I investigated whether stored resources in tree sapwood change after D. ponderosae attack, and whether this change relates to fungal colonization and beetle performance. I also studied how phloem and sapwood resources vary with elevation and tree diameter and examined the effect of tree species and diameter on D. ponderosae host selection. Following beetle attack and fungal colonization, sapwood non-structural carbohydrates (NSC), lipids, and phosphorus declined in attacked trees relative to un-attacked trees. Resource declines were related to the degree of fungal colonization, suggesting a direct benefit to fungi in both host species. In P. contorta, beetle performance was also positively related to stored resources. The concentration of stored resources was generally higher in P. albicaulis than in P. contorta and increased with elevation and tree diameter, suggesting a potential increase in host quality for D. ponderosae and/or fungi. Beetles preferred larger diameter hosts, and although stored resources did not affect beetle performance in P. albicaulis, beetles were more likely to attack P. albicaulis even when larger P. contorta were available. In a parallel system in Norway, phloem NSC and sapwood lipids also declined in Picea abies trees inoculated with the fungus Ceratocystis polonica relative to trees attacked by the bark beetle Ips typographus (which vectors C. polonica) or control trees, again indicating that stored resources enhance fungal colonization. Overall, my results suggest that host stored resources influence the interaction between bark beetles, fungi, and conifers primarily by enhancing fungal growth. Fungal access to stored resources may also benefit beetles in some host tree species. A better understanding of the trophic interactions between beetles, fungi, and conifers may improve our ability to predict bark beetle dynamics and range expansion.
Book Synopsis Physiological Aspects of Lodgepole Pine Wound Responses to a Fungal Symbiont of the Mountain Pine Beetle, Dendroctonus Ponderosae (Coleoptera: Scolytidae) by : K. F. Raffa
Download or read book Physiological Aspects of Lodgepole Pine Wound Responses to a Fungal Symbiont of the Mountain Pine Beetle, Dendroctonus Ponderosae (Coleoptera: Scolytidae) written by K. F. Raffa and published by . This book was released on 1983 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Mountain Pine Beetle by : Pacific Forestry Centre
Download or read book The Mountain Pine Beetle written by Pacific Forestry Centre and published by . This book was released on 2006 with total page 304 pages. Available in PDF, EPUB and Kindle. Book excerpt: "This book presents a synthesis of published information on mountain pine beetle (Dendroctonus ponderosae Hopkins [Coleoptera: Scolytidae]) biology and management with an emphasis on lodgepole pine (Pinus contorta Dougl. ex Loud. var. latifolia Engelm.) forests of western Canada. Intended as a reference for researchers as well as forest managers, the book covers three main subject areas: mountain pine beetle biology, management, and socioeconomic concerns. The chapters on biology cover taxonomy, life history and habits, distribution, insect-host tree interactions, development and survival, epidemiology, and outbreak history. The management section covers management strategy, survey and detection, proactive and preventive management, and decision support tools. The chapters on socioeconomic aspects include an economic examination of management programs and the utilization of post-beetle salvage timber in solid wood, panelboard, pulp and paper products."--Publisher's description.
