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Modeling The Effect Of Landscape Pattern On Mountain Pine Beetles
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Book Synopsis Modeling the Effect of Landscape Pattern on Mountain Pine Beetles by : Josie Hughes
Download or read book Modeling the Effect of Landscape Pattern on Mountain Pine Beetles written by Josie Hughes and published by . This book was released on 2006-01-01 with total page 53 pages. Available in PDF, EPUB and Kindle. Book excerpt: Despite ecological and management importance, little is known about the effect of forest landscape structure on the spread of mountain pine beetles (Dendroctonus ponderosae Hopkins). The general prediction from published literature is that forest fragmentation at some scale might slow the spread of infestations. However, mountain pine beetle dispersal ecology is complicated by requirement for attack en masse and a pheromone-based communication system that facilitates this aggregation process. One interesting possibility is that infestations might spread more slowly over habitat gaps across which beetles cannot communicate. To investigate this possibility, the authors developed an individual-based model of mountain pine beetle dispersal, aggregation and attack, and performed simulation experiments to explore the effects of habitat patch size, habitat compaction, communication distance, and flight behaviour on the spread rate and final extent of infestations.
Author :Josie Hughes Publisher :National Library of Canada = Bibliothèque nationale du Canada ISBN 13 :9780612818200 Total Pages :127 pages Book Rating :4.8/5 (182 download)
Book Synopsis Modeling the Effect of Landscape Pattern on Mountain Pine Beetles [microform] by : Josie Hughes
Download or read book Modeling the Effect of Landscape Pattern on Mountain Pine Beetles [microform] written by Josie Hughes and published by National Library of Canada = Bibliothèque nationale du Canada. This book was released on 2002 with total page 127 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Modeling the Effects of a Mountain Pine Beetle Outbreak and Potential Management Responses in Alberta's Eastern Slopes by : Richard Roland Schneider
Download or read book Modeling the Effects of a Mountain Pine Beetle Outbreak and Potential Management Responses in Alberta's Eastern Slopes written by Richard Roland Schneider and published by . This book was released on 2009 with total page 18 pages. Available in PDF, EPUB and Kindle. Book excerpt: We used a simulation model and two management scenarios to investigate possible effects of a severe mountain pine beetle (Dendroctonus ponderosae Hopkins) epidemic in Alberta, Canada. Our simulated outbreak was based on the current epidemic in British Columbia, which may kill close to 80% of the province's pine volume. Our two management scenarios were conventional harvest and a pine-reduction strategy modeled on a component of Alberta's Mountain Pine Beetle Management Strategy. The pine strategy seeks to reduce the number of susceptible pine stands by 75% over the next 20 years through targeted harvesting by the forest industry. Our simulations showed that the pine strategy could not be effectively implemented, even if the beetle outbreak was delayed for 20 years. Even though we increased mill capacity by 20% and directed all harvesting to high volume pine stands during the pine strategy's surge cut, the amount of highly susceptible pine was reduced by only 43%. Additional pine volume remained within mixed stands that were not targeted by the pine strategy. When the outbreak occurred in each scenario, sufficient pine remained on the landscape for the beetle to cause the timber supply to collapse. Alternative management approaches and avenues for future research are discussed.
Book Synopsis Environmental Effects on Host Selection and Dispersal of Mountain Pine Beetle by : Mary Lynn Reid
Download or read book Environmental Effects on Host Selection and Dispersal of Mountain Pine Beetle written by Mary Lynn Reid and published by . This book was released on 2007 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is part of a series of research papers that explore the biological, social, and economic aspects of British Columbia's mountain pine beetle epidemic. It summarizes the results of a study on the landscape variation in lodgepole pine constitutive defences, primarily measured as resin production, but also as phloem monoterpene concentration. The response of pioneer mountain pine beetles to those defences is reviewed, measured by experimentally placing beetles on trees and by attacks of free-flying beetles; effects of beetle quality (size, condition) on the beetles' responses are also examined. Finally, the results on the dispersal of mountain pine beetles through a mature lodgepole pine stand and a burned stand are presented.--Includes text from Government of Canada publications site and from document.
Book Synopsis Development and Assessment of 30-Meter Pine Density Maps for Landscape-Level Modeling of Mountain Pine Beetle Dynamics by : Benjamin A. Crabb
Download or read book Development and Assessment of 30-Meter Pine Density Maps for Landscape-Level Modeling of Mountain Pine Beetle Dynamics written by Benjamin A. Crabb and published by CreateSpace. This book was released on 2015-02-14 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forecasting spatial patterns of mountain pine beetle (MPB) population success requires spatially explicit information on host pine distribution. We developed a means of producing spatially explicit datasets of pine density at 30-m resolution using existing geospatial datasets of vegetation composition and structure. Because our ultimate goal is to model MPB population success, three study areas in the western United States that have experienced recent MPB outbreaks were used for evaluation. Pine density estimates for each study area were compared to measures of cumulative MPB-caused pine mortality summarized from annual Aerial Detection Surveys (ADS). ADS data provide spatial and temporal representations of MPB-caused pine mortality collected by observers in fixed wing aircraft and are the most readily available estimates of landscape-scale impacts of MPB. Regression analyses using LANDFIRE ecological systems classifications (EVTs) as units of analysis showed that the best pine density estimates explained 75 to 98% of cumulative MPB-caused tree mortality.
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.
Book Synopsis Mountain Pine Beetle Dynamics in Lodgepole Pine Forests by : Walter E. Cole
Download or read book Mountain Pine Beetle Dynamics in Lodgepole Pine Forests written by Walter E. Cole and published by . This book was released on 1980 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Multitemporal Remote Sensing of Landscape Pattern Dynamics Resulting from Mountain Pine Beetle Infestation and Timber Harvest by :
Download or read book Multitemporal Remote Sensing of Landscape Pattern Dynamics Resulting from Mountain Pine Beetle Infestation and Timber Harvest written by and published by . This book was released on 2009 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: Occurring over multiple years and impacting an area over 13 million hectares to date, the current epidemic of mountain pine beetle (Dendroctonus ponderosae Hopkins) in British Columbia lends itself to the use of remote sensing technologies for monitoring purposes. Change detection procedures based upon spectral values are common; however, monitoring changes in landscape pattern presents opportunities for the generation of unique and ecologically important information. Furthermore, while the use of two images may provide the means to identify change, the use of more than two images affords the ability for long-term monitoring and characterization of processes such as change rates and dynamics. The initial component of this study consists of a literature review undertaken to investigate and summarize methods and applications of landscape pattern analysis using three or more image dates. This information was in turn used to make recommendations for the application of landscape pattern analysis of a time-series of remotely-sensed data to a case study involving mountain pine beetle infestation and timber harvesting. Following the review, we focused on the detection and monitoring of lodgepole pine stands in order to quantify the progression of forest fragmentation and loss of connectivity as a result of mountain pine beetle infestation and timber harvest. This was accomplished using a key set of landscape pattern indices applied to six Landsat satellite images spanning 1993 to 2006. Through our analysis we found that the impacts of the mountain pine beetle on forest spatial pattern consist of an increase in the number of forest patches, shape complexity, and patch isolation, and a decrease in forest patch size and interspersion. In addition, we determined that in a spatial context, mountain pine beetle infestation plays a significantly greater role in forest fragmentation and loss of connectivity than timber harvest. However, we also discuss the limitations of these find.
Book Synopsis Incorporating Present and Future Climatic Suitability Into Decision Support Tools to Predict Geographic Spread of the Mountain Pine Beetle by : Terence Leckie Shore
Download or read book Incorporating Present and Future Climatic Suitability Into Decision Support Tools to Predict Geographic Spread of the Mountain Pine Beetle written by Terence Leckie Shore and published by . This book was released on 2008 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: The main goal of this project was to adapt existing mountain pine beetle (MPB) decision-support tools to incorporate climatic suitability information to refine the spatial characterization of present climate and to support assessments of future climate. These tools include susceptibility and risk rating systems, the MPBSim stand-scale MPB population model, the landscape-scale SELES-MPB population model, and graph-based connectivity methods. We made significant advances on all of these, resulting in a suite of tools with increased capabilities and generality. During the course of this project, we also provided decisions support in the specific areas of study, in particular Dawson Creek and central-western Alberta. The basis of the climatic suitability was the work of A. Carroll et al. (2004) which produced estimates of MPB climatic suitability in five classes across western Canada, for historical, existing and future climates. Future climate information was derived from global circulation models such as the CGCM model. They input general climate information into the BioSim tool, in conjunction with topography and other variables relevant to downscaling for MPB, to produce the MPB climatic suitability maps. We used these maps to create an adaptation of the MPB susceptibility and risk rating system that replaced the coarser location factor (based on latitude, longitude and elevation) with MPB climatic suitability. It is important to note that the MPB climatic suitability refers only to climatic conditions relevant for MPB survival and reproduction, while the susceptibility rating system incorporates pine host information. We also modified MPBSim, a stand-scale population model, to utilize the MPB climatic suitability information. In previous applications, MPBSim was adapted to local conditions via a calibration process using local weather information. In some senses, this calibration process resulted in a reasonably precise adjustment to local conditions. However, it was also fairly labour intensive and didn't account as well for spatial variability. Our approach here was to use climatic suitability to both increase spatial precision as well as produce outputs that can be readily adapted to different stand and landscapes. The SELES-MPB landscape-scale population model scales MPBSim dynamics to broad spatial areas. We modified this tool to utilize the revised MPBSim output. This supports more rapid adaptation to other landscapes, as well as allows examination of potential effects of future climate. Our Dawson Creek analysis indicated that beetle management in the Dawson Creek area could significantly affect the spread and impact of the beetle outbreak over the next 10 years, provided that high levels of fell and burn and survey efforts are maintained. Estimated impacts are significantly affected by external pressure from the main outbreak, as estimated using the provincial-scale BCMPB projection. If mountain pine beetle populations can be held low until the main outbreak subsides (which will likely occur within the next five years due to availability of hosts), management should be able to curtail major losses in the Dawson Creek area. In areas with new or no current MPB attack, especially in areas within the expanding range, there is relatively high uncertainty of how the MPB may spread, such as in central-western Alberta. We developed graph-based connectivity methods to assess the spatial pattern of high susceptibility hosts across broad regions, under historic, existing or future climates. This information has been useful to help prioritize and rank stands for treatment in areas of imminent or future risk, and to identify areas for which treatment has no benefit.
Book Synopsis Dawson Creek Mountain Pine Beetle Spread Analysis by : A. Fall
Download or read book Dawson Creek Mountain Pine Beetle Spread Analysis written by A. Fall and published by . This book was released on 2006 with total page 32 pages. Available in PDF, EPUB and Kindle. Book excerpt: This study is part of a series of research papers that explore the biological, social, and economic aspects of British Columbia's mountain pine beetle epidemic. The main purpose of this study was to apply and refine a model methodology to evaluate the effectiveness of landscape-scale bark beetle-management activities in reducing losses to mountain pine beetle, and to analyze the potential spread of the beetle across the study area. Specifically, the goal of this project was to address the question: what would be the likely trajectory and impacts from the current beetle outbreak under a range of alternative beetle-management regimes?
Book Synopsis Impacts of Climate Change on Mountain Pine Beetle Habitat Connectivity in Western Canada by : William G. Riel
Download or read book Impacts of Climate Change on Mountain Pine Beetle Habitat Connectivity in Western Canada written by William G. Riel and published by . This book was released on 2011 with total page 36 pages. Available in PDF, EPUB and Kindle. Book excerpt: In 2007, a multi-year connectivity modelling experiment was initiated to better understand the movement potential of mountain pine beetle (MPB) in Alberta and Saskatchewan pine forests. In the first year, spatial models of highly susceptible pine forest connectivity were developed for Alberta and Saskatchewan. The following year, the study focused solely on Alberta pine forests as our investigation turned to examine the effect that different pine species have on the connectivity model. In the third year (2009-10), the influence of climate on the landscape connectivity in Alberta was explored. To investigate the impacts of possible climate changes, minimum planar graphs were developed for the Alberta pine forests based on a modified stand susceptibility index. It was found that the stand susceptibility index most closely reflected observed MPB spread patterns when there were no climatic limitations in the model. A preliminary verification of the connectivity model was also performed. Using the model to determine expected 2009 MPB locations based on observed 2008 MPB source locations, both visual and statistical comparisons were performed to determine how well the model matched observed MPB spread. Generally, MPB were preferentially selecting closely connected habitat, but some of the direction of spread did not follow expected patterns. Some factor other than habitat connectivity (such as wind direction during MPB flight or topography) was influencing MPB spread: this warrants further exploration.
Book Synopsis Modeling the Effects of a Mountain Pine Beetle Outbreak and Potential Management Responses in Alberta's Eastern Slopes by :
Download or read book Modeling the Effects of a Mountain Pine Beetle Outbreak and Potential Management Responses in Alberta's Eastern Slopes written by and published by . This book was released on 2009 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Simulation Modeling of Forest Landscape Disturbances by : Ajith H. Perera
Download or read book Simulation Modeling of Forest Landscape Disturbances written by Ajith H. Perera and published by Springer. This book was released on 2015-07-27 with total page 324 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forest landscape disturbances are a global phenomenon. Simulation models are an important tool in understanding these broad scale processes and exploring their effects on forest ecosystems. This book contains a collection of insights from a group of ecologists who address a variety of processes: physical disturbances such as drought, wind, and fire; biological disturbances such as defoliating insects and bark beetles; anthropogenic influences; interactions among disturbances; effects of climate change on disturbances; and the recovery of forest landscapes from disturbances—all from a simulation modeling perspective. These discussions and examples offer a broad synopsis of the state of this rapidly evolving subject.
Book Synopsis Development and Assessment of 30-meter Pine Density Maps for Landscape-level Modeling of Mountain Pine Beetle Dynamics by : Benjamin A. Crabb
Download or read book Development and Assessment of 30-meter Pine Density Maps for Landscape-level Modeling of Mountain Pine Beetle Dynamics written by Benjamin A. Crabb and published by . This book was released on 2012 with total page 43 pages. Available in PDF, EPUB and Kindle. Book excerpt: Forecasting spatial patterns of mountain pine beetle (MPB) population success requires spatially explicit information on host pine distribution. We developed a means of producing spatially explicit datasets of pine density at 30-m resolution using existing geospatial datasets of vegetation composition and structure. Because our ultimate goal is to model MPB population success, three study areas in the western United States that have experienced recent MPB outbreaks were used for evaluation. Pine density estimates for each study area were compared to measures of cumulative MPB-caused pine mortality summarized from annual Aerial Detection Surveys (ADS). ADS data provide spatial and temporal representations of MPB-caused pine mortality collected by observers in fixed wing aircraft and are the most readily available estimates of landscape-scale impacts of MPB. Regression analyses using LANDFIRE ecological systems classifications (EVTs) as units of analysis showed that the best pine density estimates explained 75 to 98% of cumulative MPB-caused tree mortality. LANDFIRE EVTs, which provide an index of the plant communities growing in a particular 30-m cell, effectively delineate distinct vegetation types that are meaningful suitability indicators for MPB-caused tree mortality. Our analyses suggested that available geospatial vegetation datasets derived from field data and remotely sensed imagery are useful for producing spatially explicit measures of pine density for use in landscape-level modeling of MPB dynamics.
Book Synopsis Evolution of a Research Prototype Expert System for Endemic Populations of Mountain Pine Beetle in Lodgepole Pine Forests by : Dale L. Bartos
Download or read book Evolution of a Research Prototype Expert System for Endemic Populations of Mountain Pine Beetle in Lodgepole Pine Forests written by Dale L. Bartos and published by . This book was released on 1989 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Preliminary Risk Rating for Mountain Pine Beetle Infestation of Lodgepole Pine Forests Over Large Areas with Ordinal Regression Modelling by : Colin Robertson
Download or read book Preliminary Risk Rating for Mountain Pine Beetle Infestation of Lodgepole Pine Forests Over Large Areas with Ordinal Regression Modelling written by Colin Robertson and published by . This book was released on 2009 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In western Canada, the operational risk rating system for mountain pine beetle is based on biological knowledge gained from a rich legacy of stand-scale field studies. Owing to the large spatial and temporal extents of the current epidemic, new research into large-area mountain pine beetle processes has revealed further insights into the landscape-scale characteristics of beetle infested forests. This research evaluates the potential for this new knowledge to augment an established system for rating the short-term risk of tree mortality in a stand due to mountain pine beetle.--Publisher's website.
Author :International Association of Landscape Ecology. United States Regional Association. Symposium Publisher : ISBN 13 : Total Pages :268 pages Book Rating :4.:/5 (319 download)
Book Synopsis Beyond Borders, Linking Landscapes by : International Association of Landscape Ecology. United States Regional Association. Symposium
Download or read book Beyond Borders, Linking Landscapes written by International Association of Landscape Ecology. United States Regional Association. Symposium and published by . This book was released on 2003 with total page 268 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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