Download or read book The Decline of Diffuse Knapweed in British Columbia written by Reg F. Newman and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: There are literature reports of a decline in diffuse knapweed population beginning in the early 2000s at several locations on western North American rangeland. To document changes in certain diffuse knapweed populations in British Columbia, we selected five previously monitored diffuse knapweed-invaded sites located on low-elevation grasslands in the Bunchgrass and Ponderosa Pine BEC zones in the southern interior and sampled these for plant species cover, and abundance of biological control insects. Diffuse knapweed populations and soil seed reserves were shown to decline by an average of 74% and 78%, respectively, at five sites in British Columbia from the 1990s to 2009. Three factors were discussed as possible causes for the decline of diffuse knapweed at the five sites. Climate warming/drying was shown to have occurred over the same period as the reported decline in diffuse knapweed at three Kamloops sites and is a possible contributing factor. Increased plant competition, particularly from bluebunch wheatgrass, may also be a contributing factor; however, the small number of sampling sites in this study cannot provide firm conclusions in this regard. The ubiquitous nature of biological control insects at the five sites, combined with their known abilities to damage knapweed, also places biological control as a possible contributing factor for the decline of diffuse knapweed. It is also possible that two or more of the three factors are acting in concert to reduce diffuse knapweed. The demonstrated decrease in diffuse knapweed at the five sampled sites provides baseline data that may contribute to a better understanding of how biological control agents, climate warming/drying, and improved grazing management may be interacting on weed-invaded sites in British Columbia.
Download or read book Biological Control written by Charles Vincent and published by CABI. This book was released on 2007-08-20 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Biological control, the management of pests by the use of living organisms, has a long history of application to agriculture around the world. However, the effective use of beneficial organisms is constrained by environmental, legal, and economic restrictions, forcing researchers to adopt increasingly multi-disciplinary techniques in order to deploy successful biological control programs. It is this complex process, including the mindset and the social environment of the researcher as well as the science being pursued, that this book seeks to capture. Chapters reveal the experiences of scientists from the initial search for suitable control agents, to their release into ecosystems and finally to the beneficial outcomes which demonstrate the great success of biological control across diverse agro-ecosystems. Drawing together historical perspectives and approaches used in the development of biological control as well as outlining current debates surrounding terminology and differential techniques, Biological Control: A Global Perspective will be a valuable resource.
Download or read book Proceedings of the XII International Symposium on Biological Control of Weeds written by R. Sforza and published by CABI. This book was released on 2008 with total page 768 pages. Available in PDF, EPUB and Kindle. Book excerpt: Covering the research findings in various aspects of weed biocontrol, this volume explores weed biology and ecology and the economic impacts, effectiveness and practical implications of weed management strategies. It is of interest to researchers and students in plant and environmental sciences.
Download or read book Suppressing Over Abundant Invasive Plants and Insects in Natural Areas by Use of Their Specialized Natural Enemies written by and published by Government Printing Office. This book was released on with total page 104 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Why Ecology Matters written by Charles J. Krebs and published by University of Chicago Press. This book was released on 2016-05-25 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt: Global temperatures and seawater levels rise; the world’s smallest porpoise species looms at the edge of extinction; and a tiny emerald beetle from Japan flourishes in North America—but why does it matter? Who cares? With this concise, accessible, and up-to-date book, Charles J. Krebs answers critics and enlightens students and environmental advocates alike, revealing not why phenomena like these deserve our attention, but why they demand it. Highlighting key principles in ecology—from species extinction to the sun’s role in powering ecosystems—each chapter introduces a general question, illustrates that question with real-world examples, and links it to pressing ecological issues in which humans play a central role, such as the spread of invasive species, climate change, overfishing, and biodiversity conservation. While other introductions to ecology are rooted in complex theory, math, or practice and relegate discussions of human environmental impacts and their societal implications to sidebars and appendices, Why Ecology Matters interweaves these important discussions throughout. It is a book rooted in our contemporary world, delving into ecological issues that are perennial, timeless, but could not be more timely.
Download or read book Knapweed Its Cause and Effect in British Columbia written by Roy Cranston and published by . This book was released on 1985 with total page 16 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Annual Technical Report written by Aberdeen Plant Materials Center (U.S.) and published by . This book was released on 2005 with total page 362 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ecological Interactions And Biological Control written by David A. Andow and published by CRC Press. This book was released on 2019-04-11 with total page 348 pages. Available in PDF, EPUB and Kindle. Book excerpt: Recent interest in nonchemical methods of pest control has brought renewed attention to the biological control of plant pests in the fields of entomology, plant pathology, and weed science. Ecological Interactions and Biological Control addresses issues of theory and practice common to all three fields. Focusing on systems rather than on individual
Download or read book Ecology and Control of Introduced Plants written by Judith H. Myers and published by Cambridge University Press. This book was released on 2003-05-15 with total page 332 pages. Available in PDF, EPUB and Kindle. Book excerpt: The global spread of plant species by humans is both a fascinating large scale experiment and, in many cases, a major perturbation to native plant communities. Many of the most destructive weeds today have been intentionally introduced to new environments where they have had unexpected and detrimental impacts. This 2003 book considers the problem of invasive introduced plants from historical, ecological and sociological perspectives. We consider such questions as 'What makes a community invasible?', 'What makes a plant an invader?' and 'Can we restore plant communities after invasion?' Written with advanced students and land managers in mind, this book contains practical explanations, case studies and an introduction to basic techniques for evaluating the impacts of invasive plants. An underlying theme is that experimental and quantitative evaluation of potential problems is necessary, and solutions must consider the evolutionary and ecological constraints acting on species interactions in newly invaded communities.
Download or read book Field Guide for the Biological Control of Weeds in the Northwest written by Rachel Winston and published by Government Printing Office. This book was released on 2017-12-13 with total page 338 pages. Available in PDF, EPUB and Kindle. Book excerpt: This guide focuses on the most problematic weeds in eastern North America for which there are at least some biocontrol agents established and/or available. Multiple photos and descriptions of each weed included in this guide emphasize key identification traits and plant ecology. For each weed included in this guide, all biocontrol agents released or currently found in North America are described individually. Photos highlighting key identification features and damage are included. The release history, current status, and recommended use of each biocontrol agent are described in detail. Recommendations and current impact often vary between the US and Canada, therefore, the information is presented separately. Includes international code of best practices for classical biological control of weeds.
Download or read book Research Branch report written by Canada. Agriculture Canada. Research Branch and published by . This book was released on 1987 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Biology and Management of Noxious Rangeland Weeds written by Roger L. Sheley and published by . This book was released on 1999 with total page 466 pages. Available in PDF, EPUB and Kindle. Book excerpt: In addition to the theory and principles of weed management, this book provides information about twenty-nine of the most serious weeds in the West, including weed identification, origin, history and distribution, invasion potentials, biology and ecology, and specific management options. Full-color photographs and distribution maps help illustrate the plants and the invasive threat they pose. An invaluable resource for land managers, resource specialists, and students of natural resource management, Biology and Management of Noxious Rangeland Weeds provides practical, science-based information needed for sustainable weed management and land restoration.
Download or read book British Columbia s Inland Rainforest written by Susan Stevenson and published by UBC Press. This book was released on 2011-07 with total page 458 pages. Available in PDF, EPUB and Kindle. Book excerpt: The vast temperate rainforests of coastal British Columbia are world renowned, but much less is known about the other rainforest located 500 kilometres inland along the western slopes of the interior mountains. The unique integration of continentality and humidity in this region favours the development of lush rainforest communities that incorporate both coastal and boreal elements. In British Columbia's Inland Rainforest, scientists bring together, for the first time, a broad spectrum of information about this distinctive ecosystem. They also consider the ecological consequences of human activities in the rainforest and present strategies for its management and conservation.
Download or read book Biological Control of Weeds written by Ernest S. Delfosse and published by CSIRO Publishing. This book was released on 1992 with total page 772 pages. Available in PDF, EPUB and Kindle. Book excerpt: This volume represents the proceedings of the VIII International Symposium on Biological Control of Weeds. The papers cover all aspects of the theory and practice of biological control of weeds. The increased use of plant pathogens to control weeds is reflected.
Download or read book Plant Microbe Interactions and Biological Control written by Greg Boland and published by CRC Press. This book was released on 1998-01-05 with total page 468 pages. Available in PDF, EPUB and Kindle. Book excerpt: Discusses the critical role of host-pathogen interactions in developing new and alternative biocontrol agents that promote plant health and disease resistance in crop pathosystems. Describes state-of-the-art as well as future technologies leading to more effective biological control programs.
Download or read book Bulletin Entomological Society of Canada written by Entomological Society of Canada (1951- ) and published by . This book was released on 2005 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Invasive Plants Ecological and Agricultural Aspects written by S. Inderjit and published by Springer Science & Business Media. This book was released on 2006-01-16 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt: Invasive plants have an impact on global biodiversity and ecosystem function, and their management is a complex task. The aim of this book is to discuss fundamental questions of invasion ecology, such as why particular communities become more invasible than others, what the mechanisms of exclusion of native species by invaders are, and whether invasion can be predicted. In addition, agricultural practices influencing invasion, the environmental and economic costs of invasion as well as possible management strategies are discussed. Readers will get a unique perspective on invasion ecology through employing general principles of ecology to plant invasions.
