Due to the long-term planning horizons and the great variety of natural, economic, and operational hazards affecting forest ecosystems, uncertainty and multiple risk are typical aspects of forest management. Applications of risk analysis are surprisingly rare, in spite of the rich assortment of sophisticated forest planning tools that are available today. The objective of this particular volume within the book series Managing Forest Ecosystems is to present state-of-the-art research results, concepts, and techniques regarding the assessment and evaluation of natural hazards and the analysis of risk and uncertainty relating to forest management. Various aspects of risk analysis are covered, including examples of specific modelling tools. The book is divided into three sections covering ecological perspectives, applications in engineering and planning, and methods applicable to economics and policy.

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This risk assessment projects the effects of eight forest diseases under two climate-change scenarios (warmer and drier, warmer and wetter). Examples are used to describe how various types of forest diseases may respond to environmental changes. The likelihood and consequences of increased damage to forests from each disease as a result of climate change are analyzed and assigned a risk value of high, moderate, or low. The risk value is based on available biological information and subjective judgment. Forest diseases discussed in this publication include foliar diseases, Phytophthora diseases, stem rusts, canker diseases, dwarf mistletoes, root diseases, and yellow-cedar decline. Although results suggest that climate change will affect forest health, uncertainty arises regarding the degree of climate change that will occur; pathogen biology under changing climate; the effects of changing climate directly on the host; and the interactions between the pathogen, host, and climate.

Climate change poses a huge threat to the West. The current mountain pine beetle epidemic with over 50 million acres of dying trees in western North America has created a powerful “teachable moment” across the region. A primary goal of the Forests At Risk symposium was to reframe the nation’s climate change dialogue by making the issue both personal and real to many who may not appreciate its connection to the immediate world around them. While some may have difficulty relating to rising sea levels, falling water tables, imperiled polar bears and melting glaciers in far-off places, they are still shocked by the sight of vast dying forests around their homes. The Forests At Risk symposium explored the statement by Andy Jacobson, a carbon cycle scientist at the National Oceanic and Atmospheric Administration in Boulder, that “this is the kind of feedback we're all very worried about in the carbon cycle ... a warming planet leading to, in this case, an insect outbreak that increases carbon dioxide into the atmosphere, which can increase warming.” The overwhelming scientific consensus holds that climate change is one of the most serious threats facing humankind today. We have a soberingly short time in which to reduce atmospheric greenhouse gases if we are to preserve our quality of life and environment. In addition to the global urgency, the American West is deeply dependent on the health of its forests, mountains and streams for both its quality of life and its economy. Put simply, if global warming shortens our winters, diminishes our recreation, and unleashes wildfires, diseases and insect epidemics that devastate our forests, the regional damage would be incalculable. NOW is the perfect time to learn more in this ebook. The Forests At Risk symposium represented the first substantial public forum focused directly on the connection between climate change and forest health in the American West. In the wake of millions of acres of pine beetle devastation across our continent, this is the ideal moment to highlight the climate change connection and focus on the question of what happens when our forests transform from carbon sinks into carbon sources.

More than 90% of wildfires are caused by human activity, but other causes include lighting, drought, wind and changing weather conditions, underground coal fires, and even volcanic activity. Wildfire Hazards, Risks, and Disasters, one of nine volumes in the Elsevier Hazards and Disasters series, provides a close and detailed examination of wildfires and measures for more thorough and accurate monitoring, prediction, preparedness, and prevention. It takes a geo-scientific and environmental approach to the topic while also discussing the impacts of human-induced causes such as deforestation, debris burning and arson—underscoring the multi-disciplinary nature of the topic. It presents several international case studies that discuss the historical, social, cultural and ecological aspects of wildfire risk management in countries with a long history of dealing with this hazard (e.g., USA, Australia) and in countries (e.g., Taiwan) where wildfire hazards represent a new and growing threat to the social and ecological landscape. Puts the contributions of environmental scientists, social scientists, climatologists, and geoscientists at your fingertips Arms you with the latest research on causality, social and societal impacts, economic impacts, and the multi-dimensional nature of wildfire mitigation, preparedness, and recovery Features a broad range of tables, figures, diagrams, illustrations, and photographs to aid in the retention of key concepts Discusses steps for prevention and mitigation of wildfires, one of the most expensive and complex geo-hazards in the world.

by Peter J. Roussopoulos, Director, Southern Research Station The world and its ecosystems are repeatedly punctuated by natural disturbances, and human societies must learn to manage this reality Often severe and unp- dictable, dynamic natural forces disrupt human welfare and alter the structure and composition of natural systems Over the past century, land management ag- cies within the United States have relied on science to improve the sustainable management of natural resources Forest economics research can help advance this scientifc basis by integrating knowledge of forest disturbance processes with their economic causes and consequences As the twenty-frst century unfolds, people increasingly seek the goods and services provided by forest ecosystems, not only for wood supply, clean water, and leisure pursuits, but also to establish residential communities that are removed from the hustle and bustle of urban life As vividly demonstrated during the past few years, Santa Ana winds can blow wildfres down from the mountains of California, incinerating homes as readily as vegetation in the canyons below Hurricanes can fatten large swaths of forest land, while associated foods create havoc for urban and rural residents alike Less dramatic, but more insidious, trees and forest stands are succumbing to exotic insects and diseases, causing economic losses to private property values (including timber) as well as scenic and recreation values As human demands on public and private forests expand, science-based solutions need to be identifed so that social needs can be balanced with the vagaries of forest disturbance processes

Examines the destruction of the world's rain forests and the impact on the animals and people who make these forests their home.