Download or read book What Explains Landscape Patterns of Tree Mortality Caused by Bark Beetle Outbreaks in Greater Yellowstone written by Martin Simard and published by . This book was released on 2012 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt: Aim- Bark beetle outbreaks have recently affected extensive areas of western North American forests, and factors explaining landscape patterns of tree mortality are poorly understood. The objective of this study was to determine the relative importance of stand structure, topography, soil characteristics, landscape context (the characteristics of the landscape surrounding the focal stand) and beetle pressure (the abundance of local beetle population eruptions around the focal stand a few years before the outbreak) to explain landscape patterns of tree mortality during outbreaks of three species: the mountain pine beetle, which attacks lodgepole pine and whitebark pine; the spruce beetle, which feeds on Engelmann spruce; and the Douglas-fir beetle, which attacks Douglas-fir. A second objective was to identify common variables that explain tree mortality among beetle-tree host pairings during outbreaks. Location- Greater Yellowstone ecosystem, Wyoming, USA. Methods- We used field surveys to quantify stand structure, soil characteristics and topography at the plot level in susceptible stands of each forest type showing different severities of infestation (0-98% mortality; n= 129 plots). We then used forest cover and beetle infestation maps derived from remote sensing to develop landscape context and beetle pressure metrics at different spatial scales. Plot-level and landscape-level variables were used to explain outbreak severity. Results- Engelmann spruce and Douglas-fir mortality were best predicted using landscape-level variables alone. Lodgepole pine mortality was best predicted by both landscape-level and plot-level variables. Whitebark pine mortality was best - although poorly - predicted by plot-level variables. Models including landscape context and beetle pressure were much better at predicting outbreak severity than models that only included plot-level measures, except for whitebark pine. Main conclusions- Landscape-level variables, particularly beetle pressure, were the most consistent predictors of subsequent outbreak severity within susceptible stands of all four host species. These results may help forest managers identify vulnerable locations during ongoing outbreaks.
Download or read book Bark Beetle fire forest Interactions in the Greater Yellowstone Ecosystem written by Martin Simard and published by . This book was released on 2010 with total page 122 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Bark Beetle Management Ecology and Climate Change written by Kamal J.K. Gandhi and published by Academic Press. This book was released on 2021-10-28 with total page 438 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bark Beetle Management, Ecology, and Climate Change provides the most updated and comprehensive knowledge on the complex effects of global warming upon the economically and ecologically important bark beetle species and their host trees. This authoritative reference synthesizes information on how forest disturbances and environmental changes due to current and future climate changes alter the ecology and management of bark beetles in forested landscapes. Written by international experts on bark beetle ecology, this book covers topics ranging from changes in bark beetle distributions and addition of novel hosts due to climate change, interactions of insects with altered host physiology and disturbance regimes, ecosystem-level impacts of bark beetle outbreaks due to climate change, multi-trophic changes mediated via climate change, and management of bark beetles in altered forests and climate conditions. Bark Beetle Management, Ecology, and Climate Change is an important resource for entomologists, as well as forest health specialists, policy makers, and conservationists who are interested in multi-faceted impacts of climate change on forest insects at the organismal, population, and community-levels. - The only book that addresses the impacts of global warming on bark beetles with feedback loops to forest patterns and processes - Discusses altered disturbance regimes due to climate change with implications for bark beetles and associated organisms - Led by a team of editors whose expertise includes entomology, pathology, ecology, forestry, modeling, and tree physiology
Download or read book Bark Beetles written by Fernando E. Vega and published by Academic Press. This book was released on 2014-12-29 with total page 641 pages. Available in PDF, EPUB and Kindle. Book excerpt: Bark Beetles: Biology and Ecology of Native and Invasive Species provides a thorough discussion of these economically important pests of coniferous and broadleaf trees and their importance in agriculture. It is the first book in the market solely dedicated to this important group of insects, and contains 15 chapters on natural history and ecology, morphology, taxonomy and phylogenetics, evolution and diversity, population dynamics, resistance, symbiotic associations, natural enemies, climate change, management strategies, economics, and politics, with some chapters exclusively devoted to some of the most economically important bark beetle genera, including Dendroctonus, Ips, Tomicus, Hypothenemus, and Scolytus. This text is ideal for entomology and forestry courses, and is aimed at scientists, faculty members, forest managers, practitioners of biological control of insect pests, mycologists interested in bark beetle-fungal associations, and students in the disciplines of entomology, ecology, and forestry. - Provides the only synthesis of the literature on bark beetles - Features chapters exclusively devoted to some of the most economically important bark beetle genera, such as Dendroctonus, Ips, Tomicus, Hypothenemus, and Scolytus - Includes copious color illustrations and photographs that further enhance the content
Download or read book Pine Bark Beetles written by and published by Academic Press. This book was released on 2016-04-28 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: Pine Bark Beetles, the latest release in the Advances in Insect Physiology series, provides readers with the latest interdisciplinary reviews on the topic. It is an essential reference source for invertebrate physiologists, neurobiologists, entomologists, zoologists, and insect chemists. - Contains important, comprehensive, and in-depth reviews on insect physiology - Provides an essential reference source for invertebrate physiologists and neurobiologists, entomologists, zoologists, and insect biochemists - First published in 1963, this serial is ranked second in the highly competitive ISI category of entomology
Download or read book Learning Landscape Ecology written by Sarah E. Gergel and published by Springer. This book was released on 2017-03-30 with total page 349 pages. Available in PDF, EPUB and Kindle. Book excerpt: This title meets a great demand for training in spatial analysis tools accessible to a wide audience. Landscape ecology continues to grow as an exciting discipline with much to offer for solving pressing and emerging problems in environmental science. Much of the strength of landscape ecology lies in its ability to address challenges over large areas, over spatial and temporal scales at which decision-making often occurs. As the world tackles issues related to sustainability and global change, the need for this broad perspective has only increased. Furthermore, spatial data and spatial analysis (core methods in landscape ecology) are critical for analyzing land-cover changes world-wide. While spatial dynamics have long been fundamental to terrestrial conservation strategies, land management and reserve design, mapping and spatial themes are increasingly recognized as important for ecosystem management in aquatic, coastal and marine systems. This second edition is purposefully more applied and international in its examples, approaches, perspectives and contributors. It includes new advances in quantifying landscape structure and connectivity (such as graph theory), as well as labs that incorporate the latest scientific understanding of ecosystem services, resilience, social-ecological landscapes, and even seascapes. Of course, as before, the exercises emphasize easy-to-use, widely available software. http://sarahgergel.net/lel/learning-landscape-ecology/
Download or read book Assessment and Response to Bark Beetle Outbreaks in the Rocky Mountain Area written by United States. Forest Health Protection and published by . This book was released on 1998 with total page 60 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mountains and Plains written by Dennis H. Knight and published by Yale University Press. This book was released on 2014-01-01 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many changessome discouraging, others hopefulhave occurred in the Rocky Mountain region since the first edition of this widely acclaimed book was published. Wildlife habitat has become more fragmented, once-abundant sage grouse are now scarce, and forest fires occur more frequently. At the same time, wolves have been successfully reintroduced, and new approaches to conservation have been adopted. For this updated and expanded Second Edition, the authors provide a highly readable synthesis of research undertaken in the past two decades and address two important questions: How can ecosystems be used so that future generations benefit from them as we have? How can we anticipate and adapt to climate changes while conserving biological diversity?
Download or read book Bark Beetle and Wood Borer Infestation in the Greater Yellowstone Area During Four Postfire Years written by and published by . This book was released on 1996 with total page 12 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mechanisms and Spatial Patterns of Bark Beetle associated Mortality Following Variable Density Thinning Treatments in a Sierra Mixed conifer Forest written by Alexis Bernal and published by . This book was released on 2019 with total page 96 pages. Available in PDF, EPUB and Kindle. Book excerpt: Long-term trends of tree mortality have increased over the last several decades, coinciding with above-average temperatures, high climatic water deficits, and bark beetle outbreaks. With the anticipation that drought and bark beetles may increase with climate change, uncertainty exists over the appropriate treatments that could ensure the future sustainability of forest resources and the ecosystem services that forests provide. Conventional thinning treatments are used to reduce stand density, with the assumption that reductions in competition can alleviate drought stress and enable trees to resist bark beetle attack. Alternative thinning treatments may also reduce stand density, but have a greater focus on increasing spatial heterogeneity. Variable density thinning is a management method intended to mimic the spatial heterogeneity that was present in mixed-conifer forests prior to logging and fire exclusion. Although the added benefits of increasing spatial heterogeneity include biodiversity, wildlife, recreation, and restoration, information is lacking on the effects that these treatments have on tree resistance to disturbances. Since 2012, the Sierra Nevada experienced widespread tree mortality coinciding with severe drought conditions and bark beetle outbreak. This provided a unique opportunity to explore the mechanisms driving bark beetle-associated mortality following variable density thinning treatments in the central Sierra Nevada. Using dendrochronological methods, we modeled the relationship between drought resistance and bark beetle-associated mortality to evaluate if reductions in competition enhance tree resistance to bark beetles. We also determined if structural elements within variable density thinning treatments influenced the level and spatial pattern of bark beetle-associated mortality. By exploring these relationships, our findings could provide a greater understanding on the underlying mechanisms that drive mortality to disturbances and also provide information to help develop prescriptions for enhancing resistance to drought and bark beetles.
Download or read book Medicine Bow Routt National Forests N F Bark Beetle Analysis written by and published by . This book was released on 2002 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Western Bark Beetle Report written by United States. Forest Service and published by . This book was released on 2002 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Greater Yellowstone Public Lands written by Alice Wondrak Biel and published by . This book was released on 2006 with total page 292 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Responding to New Land Management Challenges written by Brian Petersen and published by . This book was released on 2010 with total page 412 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Western Bark Beetle Strategy written by U.s. Forest Service and published by Createspace Independent Pub. This book was released on 2012-08-15 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Western Bark Beetle Strategy identifies how the Forest Service is responding to and will respond to the western bark beetle epidemic over the next five years. The extent of the epidemic requires prioritization of treatments, first providing for human safety in areas threatened by standing dead hazard trees, and second, addressing dead and down trees that create hazardous fuels conditions adjacent to high value areas. After the priority of safety, forested areas with severe mortality will be reforested with the appropriate species (Recovery). Forests will also be thinned to reduce the number of trees per acre and create more diverse stand structures to minimize extensive epidemic bark beetle areas (resiliency). This is a modest strategy that reflects current budget realities, but focuses our resources in the most important places that we can make a big difference to the safety of the American public. This strategy covers Fiscal Year (FY) 2011 through 2016. The western United States is experiencing the largest bark beetle outbreak in recorded history. Although western forests have experienced regular infestations throughout their history, the current epidemic is notable for its intensity, extensive geographic range, and simultaneous occurrence in multiple ecosystems. Since 1997, infestations of bark beetle species have escalated resulting in more than 41.7 million acres across all ownerships sustaining some level of conifer tree mortality. The past decade's epidemic is unprecedented in its environmental and social impacts. Various parts of the west experienced bark beetle population peaks at different times over the past 14 years. The Forest Service and the Natural Resources Conservation Service undertook a focused safety and recovery effort that was supported by approximately $138 million in agency and supplemental appropriations. From 2000 through 2009, the intermountain west experienced bark beetle caused mortality over an estimated 21.7 million acres across all ownerships, 17.7 million acres on national forests. The situation is further complicated by the fact that more and more people live and recreate in areas affected by the epidemic. This strategy incorporates our current understanding of available scientific research and presents a science-based path forward. The strategy will be achieved through well-defined goals, objectives, and action items, to address each of the three prongs of the bark beetle problem: human safety, forest recovery, and long-term forest resiliency. A successful approach to mitigating the impact of bark beetle must address actions for all three goals. While safety of human communities and infrastructure protection is paramount, there is also a critical need to restore the function and structure of our forests. Bark beetle is a natural part of our forests and as such will regularly impact our forests and the adjacent communities. Conducting resiliency treatments now and in the future will help minimize the potential for new outbreaks of bark beetles or make future outbreaks less intense. Although there has been much work accomplished to date for bark beetle management, this report focuses on the future. Honing our continuing response will seek to integrate various vegetation management activities across all jurisdictions to address bark beetle concerns in prioritized areas. Now is the time to act. Forest Service resources are in a position in which they can effectively respond and address this issue with increased effort. Public safety and economic impacts and costs will only increase if we delay.
Download or read book Canadian Journal of Forest Research written by and published by . This book was released on 2016 with total page 328 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Evaluating Post outbreak Management Effects on Future Fuel Profiles and Stand Structure in Bark Beetle impacted Forests of Greater Yellowstone written by Daniel C. Donato and published by . This book was released on 2013 with total page 15 pages. Available in PDF, EPUB and Kindle. Book excerpt: Large-scale bark beetle (Curculionidae: Scolytinae) outbreaks across western North America have prompted widespread concerns over changes to forest wildfire potentials. Management actions following outbreaks often include the harvest of beetle-killed trees and subsequent fuel treatments to mitigate expected changes to fuel profiles, but few data exist to inform these actions. In both lodgepole pine (Pinus contorta var. latifolia) and Douglas-fir (Pseudotsuga menziesii var. glauca) forests of the Greater Yellowstone Ecosystem, Wyoming, USA, we used the Forest Vegetation Simulator to evaluate how fuel profiles, stand structure, and biomass carbon storage are influenced by various post-outbreak fuel treatments (removal of beetle-killed trees ['salvage'] followed by either no treatment, prescribed burning, pile-and-burn, or whole-tree-removal). The model was initialized with field data from five unmanaged gray-stage stands in each forest type and projected over 50 years of post-treatment time. Across all treatment methods, the strongest projected effects relative to unharvested stands were reductions in coarse woody surface fuels (after 10-20 yr), fewer well-decayed standing snags (after 40 yr), and reduced biomass carbon storage (throughout all 50 years). The reduction in coarse woody surface fuels suggests reduced heat release and resistance to control in future fires. Projected effects on fine fuels, both in the canopy and surface layers, were surprisingly minor or short-lived; natural fall and decay of fine material in unharvested stands led to the convergence of most fuel variables between treated and untreated stands within about a decade, especially in Douglas-fir forests. Most follow-up treatment methods - whether unmerchantable tree parts were left in place, burned, piled, or removed entirely - had similar impacts on most aspects of fuel and stand structure in both lodgepole pine and Douglas-fir forests. However, the prescribed burning treatment was distinct and generally had the strongest effects, owing to greater consumption of forest floor mass and mortality of small trees, which had persistent influences on both the canopy and surface fuel layers. Treatment effectiveness in reducing fuels was mirrored by reductions in biomass carbon storage and recruitment of well-decayed snags, illustrating common tradeoffs involved in fuel treatments. Harvest of beetle-killed trees and subsequent treatments altered the fuel profile and structure of outbreak-impacted stands, but overall effects were similar among treatments, suggesting flexibility in management options in post-outbreak forests.
