Download or read book Evaluating Indices that Measure Departure of Current Landscape Composition from Historical Conditions written by Robert E. Keane and published by . This book was released on 2011 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: A measure of the degree of departure of a landscape from its range of historical conditions can provide a means for prioritizing and planning areas for restoration treatments. There are few statistics or indices that provide a quantitative context for measuring departure across landscapes. This study evaluated a set of five similarity indices commonly used in vegetation community ecology (Sorenson's Index, Chord Distance, Morisita's Index, Euclidean Distance, and Similarity Ratio) for application in estimating landscape departure (where departure = 1 - similarity). This involved comparing composition (vegetation type by area) of a set of reference landscapes to the compositions of 1,000 simulated historical landscapes. Stochastic simulation modeling was used to create a diverse set of synthetic reference and historical landscapes for departure index evaluation. Five reference landscapes were created to represent various degrees of expected departure from historical conditions. Both reference and historical landscapes were created to contain four important factors that could potentially influence departure calculation: (1) number of classes defining landscape composition, (2) dominance of the classes, (3) variability of area with the classes, and (4) temporal autocorrelation. We found that most evaluated indices are useful but not optimal for calculating departure. The Sorenson's Index appeared to perform the best with consistent and precise behavior across the ranges of the four treatments. The number of classes used to describe vegetation had the strongest influence on index performance; landscape composition defined by few classes had the least accurate, most imprecise, and most highly variable departure estimates. While results from this study show the utility of similarity indices in evaluating departure, it is also evident that a new set of statistics are needed to provide a more comprehensive analysis of departure for future applications.

Download or read book Research Paper RMRS written by and published by . This book was released on 1998 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book General Technical Report RMRS written by and published by . This book was released on 2006 with total page 424 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Encyclopedia of Biodiversity written by and published by Academic Press. This book was released on 2013-02-05 with total page 5485 pages. Available in PDF, EPUB and Kindle. Book excerpt: The 7-volume Encyclopedia of Biodiversity, Second Edition maintains the reputation of the highly regarded original, presenting the most current information available in this globally crucial area of research and study. It brings together the dimensions of biodiversity and examines both the services it provides and the measures to protect it. Major themes of the work include the evolution of biodiversity, systems for classifying and defining biodiversity, ecological patterns and theories of biodiversity, and an assessment of contemporary patterns and trends in biodiversity. The science of biodiversity has become the science of our future. It is an interdisciplinary field spanning areas of both physical and life sciences. Our awareness of the loss of biodiversity has brought a long overdue appreciation of the magnitude of this loss and a determination to develop the tools to protect our future. Second edition includes over 100 new articles and 226 updated articles covering this multidisciplinary field— from evolution to habits to economics, in 7 volumes The editors of this edition are all well respected, instantly recognizable academics operating at the top of their respective fields in biodiversity research; readers can be assured that they are reading material that has been meticulously checked and reviewed by experts Approximately 1,800 figures and 350 tables complement the text, and more than 3,000 glossary entries explain key terms

Download or read book Historical Environmental Variation in Conservation and Natural Resource Management written by John A. Wiens and published by John Wiley & Sons. This book was released on 2012-07-09 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: In North America, concepts of Historical Range of Variability are being employed in land-management planning for properties of private organizations and multiple government agencies. The National Park Service, U.S. Fish & Wildlife Service, Bureau of Land Management, U.S. Forest Service, and The Nature Conservancy all include elements of historical ecology in their planning processes. Similar approaches are part of land management and conservation in Europe and Australia. Each of these user groups must struggle with the added complication of rapid climate change, rapid land-use change, and technical issues in order to employ historical ecology effectively. Historical Environmental Variation in Conservation and Natural Resource Management explores the utility of historical ecology in a management and conservation context and the development of concepts related to understanding future ranges of variability. It provides guidance and insights to all those entrusted with managing and conserving natural resources: land-use planners, ecologists, fire scientists, natural resource policy makers, conservation biologists, refuge and preserve managers, and field practitioners. The book will be particularly timely as science-based management is once again emphasized in United States federal land management and as an understanding of the potential effects of climate change becomes more widespread among resource managers. Additional resources for this book can be found at: www.wiley.com/go/wiens/historicalenvironmentalvariation.

Download or read book An Assessment of Ecosystem Components in the Interior Columbia Basin and Portions of the Klamath and Great Basins written by and published by . This book was released on 1997 with total page 352 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Interior Columbia Basin Ecosystem Management Project written by and published by . This book was released on 2000 with total page 766 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Cascade Siskiyou National Monument N M Draft Resource Management Plan written by and published by . This book was released on 2005 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Disturbance departure and fragmentation of natural systems in the interior Columbia basin written by Wendel Hann and published by . This book was released on 2003 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Fire Fuels and Related Vegetation Management Direction Plan Amendment written by and published by . This book was released on 2008 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Upper Columbia River Basin Ecosystem Based Lands Management Plan ID WY UT MT NV written by and published by . This book was released on 1997 with total page 852 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Research Paper PNW written by and published by . This book was released on 1978 with total page 318 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Taos Resource Management Plan written by and published by . This book was released on 2011 with total page 526 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Forest Plan Amendments Proposed to Facilitate Implementation of the 2009 Plan Scale Wildlife Conservation Strategy Phase 1 Forested Biological Community written by and published by . This book was released on 2010 with total page 502 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Rangeland Ecology Management written by and published by . This book was released on 2005 with total page 736 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book FAO Meeting on Public Policies Affecting Forest Fires written by Food and Agriculture Organization of the United Nations and published by Food & Agriculture Org.. This book was released on 1999 with total page 384 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Development of Coarse scale Spatial Data for Wildland Fire and Fuel Management written by and published by . This book was released on 2002 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The objective of this study was to provide managers with national-level data on current conditions of vegetation and fuels developed from ecologically based methods to address these questions: How do current vegetation and fuels differ from those that existed historically? Where on the landscape do vegetation and fuels differ from historical levels? In particular, where are high fuel accumulations? When considered at a coarse scale, which areas estimated to have high fuel accumulations represent the highest priorities for treatment?