Download or read book Cattle Grazing in the National Parks Historical Development and History of Management in Three Southern Arizona Parks written by Robin Lothrop Pinto and published by . This book was released on 2014 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: This dissertation traces the history of cattle grazing at Saguaro NP, Organ Pipe Cactus NM and Fort Bowie NHS in southern Arizona. This collection of studies examines the factors affecting that use, the ranchers who made their living from the landscape, and the federal land managers responsible for sustaining the natural and cultural resources. A dominant industry on arid public lands since the Civil War, grazing was altered by a variety of influences: environmental and human-derived. Ranching communities developed from homesteading settlements. Success was determined by climate, topography, and natural resources; social and cultural pressures; economic events and political legislation; and later federal regulations and decisions. The first agency to oversee grazing, USFS was under constant pressure to maximize short-term human benefits. The NPS Organic Act of 1916 mandated conservation of natural resources "by such means as will leave them unimpaired for future generations" and yet approved cattle grazing, an extractive use, under USFS management. Park managers were frustrated by grazing practices not under their control. Parks were at a cultural and social disadvantage. Residents and politicians often expressed displeasure at park reservations; communities feared that parks would interfere with local industries. Park employees supervised visitors and developed recreation infrastructure; they came with little experience to manage livestock. Lack of funding for research, limited manpower, and political and administrative interference allowed cattle grazing to continue unregulated for decades altering vegetation and enhancing erosion. In the 1960s, changing values from the environmental movement, the waning power of the livestock industry, and the rise of activist scientists impelled NPS to act. Without monitoring data, NPS turned to legal opinions to terminate grazing. Now grazing is regulated and carefully monitored. NPS is mandated to incorporate research results into management decisions. Older grazing permits are being retired, but land acquisitions for park additions add new management challenges. Purchasing permits offers a new but financially limited opportunity to protect sensitive lands. Grazing has ended at all three parks, yet ecological changes and historic structures remain. As cultural and administrative legacies, those remnants offer opportunities to interpret a significant regional tradition and an untold controversy.
Download or read book Interpretation and Implications of Variability in Ecological Systems written by Robert Klinger and published by Frontiers Media SA. This book was released on 2024-07-22 with total page 206 pages. Available in PDF, EPUB and Kindle. Book excerpt: Numerous hypotheses have been proposed to explain the dynamics in abundance of individual species, how species interact, how communities assemble, and how interactions between biotic and abiotic processes shape ecosystem stability. Many if not most of these hypotheses find some degree of support, but often only within relatively narrow spatial and temporal ranges. This is because conditions vary over time and from place to place, and so the strength and extent of processes that were the focus of a given a hypothesis become altered by other forces. Ecologists have confronted variability from two perspectives; conceptual and statistical. Conceptually, spatial and temporal variability are now recognized as being scale dependent and hierarchical. Statistically, there are many models that ecologists readily use that account for the hierarchical and scale-dependence of variability present in many datasets. But linking the two perspectives into a meaningful understanding of what variability means in real systems has been much less successful. For example, it is common to see studies where the fixed effects of a generalized linear mixed model are reported, but very often random effects are completely ignored or, at best, given scant attention. The likelihood of this being a significant problem increases greatly in what are rapidly becoming more common studies that utilize datasets spanning long temporal and/or large spatial scales, or when extreme and often unpredictable events (gray and black swans) occur.
Download or read book Cattle Copper and Cactus written by A. Berle Clemensen and published by . This book was released on 1986 with total page 288 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book First Conference on Research and Resource Management in Southern Arizona National Park Areas written by and published by . This book was released on 1998 with total page 132 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Parks written by and published by . This book was released on 2000-05 with total page 52 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flagship publication of the National Parks Conservation Association, National Parks Magazine (circ. 340,000) fosters an appreciation of the natural and historic treasures found in the national parks, educates readers about the need to preserve those resources, and illustrates how member contributions drive our organization's park-protection efforts. National Parks Magazine uses images and language to convey our country's history and natural landscapes from Acadia to Zion, from Denali to the Everglades, and the 387 other park units in between.
Download or read book The Cattlemen s Empire written by United States. National Park Service and published by . This book was released on 1959 with total page 308 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Livestock Grazing on Federal Land Hearing Before the Subcommittee on National Parks Forests and Lands of the Committee on Resources House of Repre written by United States Congress House Committe and published by Palala Press. This book was released on 2018-03-02 with total page 452 pages. Available in PDF, EPUB and Kindle. Book excerpt: This work has been selected by scholars as being culturally important, and is part of the knowledge base of civilization as we know it. This work was reproduced from the original artifact, and remains as true to the original work as possible. Therefore, you will see the original copyright references, library stamps (as most of these works have been housed in our most important libraries around the world), and other notations in the work. This work is in the public domain in the United States of America, and possibly other nations. Within the United States, you may freely copy and distribute this work, as no entity (individual or corporate) has a copyright on the body of the work. As a reproduction of a historical artifact, this work may contain missing or blurred pages, poor pictures, errant marks, etc. Scholars believe, and we concur, that this work is important enough to be preserved, reproduced, and made generally available to the public. We appreciate your support of the preservation process, and thank you for being an important part of keeping this knowledge alive and relevant.
Download or read book Livestock Grazing on Federal Land written by United States. Congress. House. Committee on Resources. Subcommittee on National Parks, Forests, and Lands and published by . This book was released on 1995 with total page 450 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Encyclopedia of the World s Biomes written by and published by Elsevier. This book was released on 2020-06-26 with total page 3542 pages. Available in PDF, EPUB and Kindle. Book excerpt: Encyclopedia of the World’s Biomes is a unique, five volume reference that provides a global synthesis of biomes, including the latest science. All of the book's chapters follow a common thematic order that spans biodiversity importance, principal anthropogenic stressors and trends, changing climatic conditions, and conservation strategies for maintaining biomes in an increasingly human-dominated world. This work is a one-stop shop that gives users access to up-to-date, informative articles that go deeper in content than any currently available publication. Offers students and researchers a one-stop shop for information currently only available in scattered or non-technical sources Authored and edited by top scientists in the field Concisely written to guide the reader though the topic Includes meaningful illustrations and suggests further reading for those needing more specific information
Download or read book National Parks written by and published by . This book was released on 1998-09 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flagship publication of the National Parks Conservation Association, National Parks Magazine (circ. 340,000) fosters an appreciation of the natural and historic treasures found in the national parks, educates readers about the need to preserve those resources, and illustrates how member contributions drive our organization's park-protection efforts. National Parks Magazine uses images and language to convey our country's history and natural landscapes from Acadia to Zion, from Denali to the Everglades, and the 387 other park units in between.
Download or read book National Parks written by and published by . This book was released on 1998-09 with total page 44 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flagship publication of the National Parks Conservation Association, National Parks Magazine (circ. 340,000) fosters an appreciation of the natural and historic treasures found in the national parks, educates readers about the need to preserve those resources, and illustrates how member contributions drive our organization's park-protection efforts. National Parks Magazine uses images and language to convey our country's history and natural landscapes from Acadia to Zion, from Denali to the Everglades, and the 387 other park units in between.
Download or read book Reintroduction of the Mexican Wolf Within Its Historic Range in the Southwestern United States written by U.S. Fish and Wildlife Service and published by . This book was released on 1996 with total page 388 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Shivwits Grazing Management written by United States. Bureau of Land Management. Arizona State Office and published by . This book was released on 1979 with total page 262 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book A Legacy of Change written by Conrad Joseph Bahre and published by University of Arizona Press. This book was released on 2016-12-01 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The arrival of Anglo settlers in the 1870s marked the beginning of major vegetation changes in southeastern Arizona, including an increase in woody plants in rangelands, the degradation of riparian wetlands, and the spread of non-native plants. While many of these changes have already been linked to human land-use through comparative photographs and historic descriptions, it has long been presumed that changes in the region's climate have also contributed to vegetation change. Geographer Conrad Bahre now challenges the view that these vegetation changes are due to climatic change. Correlating his own field research with archival records and photographs, Bahre demonstrates that most of the changes follow some type of human disturbance, such as cattle grazing, fuelwood cutting, wildfire suppression, agriculture, and road construction. Indeed, all available evidence suggests that Anglo settlement brought unprecedented changes to the land. Vegetation change in the American West has long been an issue of concern. This careful scrutiny of one corner of that region—one of the most ecologically diverse areas of the United States—shows how poorly understood is the relationship between human activities and vegetation. More important, it introduces new techniques for differentiating between natural and anthropogenic factors effecting vegetation change that can be used to help ecologists understand vegetation dynamics worldwide.
Download or read book GIS Database Development to Analyze Fire History in Southern Arizona and Beyond written by Pamela J. Swantek and published by . This book was released on 1999 with total page 58 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Lower Gila North Grazing Management written by and published by . This book was released on 1982 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Parks written by and published by . This book was released on 1999-07 with total page 48 pages. Available in PDF, EPUB and Kindle. Book excerpt: The flagship publication of the National Parks Conservation Association, National Parks Magazine (circ. 340,000) fosters an appreciation of the natural and historic treasures found in the national parks, educates readers about the need to preserve those resources, and illustrates how member contributions drive our organization's park-protection efforts. National Parks Magazine uses images and language to convey our country's history and natural landscapes from Acadia to Zion, from Denali to the Everglades, and the 387 other park units in between.
