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Influence Of A Population Irruption By Roosevelt Elk On A Vegetation Index
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Book Synopsis Influence of a Population Irruption by Roosevelt Elk on a Vegetation Index by : Heath D. Starns
Download or read book Influence of a Population Irruption by Roosevelt Elk on a Vegetation Index written by Heath D. Starns and published by . This book was released on 2014 with total page 74 pages. Available in PDF, EPUB and Kindle. Book excerpt: Understanding the factors that influence population growth is central to the study of any species. Large herbivores can influence their food supplies through herbivory. Over 23 years just before and throughout an irruption by a Roosevelt elk population I assessed temporal and spatial patterns of the Normalized Difference Vegetation Index (NDVI). My objectives were to determine if elk herbivory was associated with NDVI and whether the plant community foraged by the irruptive population was tolerant or resistant to elk grazing. Using Landsat 5 Thematic Mapper imagery, I obtained estimates of NDVI for three areas of Redwood National and State Parks, each inhabited by distinct populations of Roosevelt elk. Each population exhibited a different pattern of growth through the time series of the study. One population underwent the irruptive growth pattern while the other two populations did not . Using piece wise regression, I detected temporal changes in NDVI for the area used by the irruptive population that suggested a decline in forage biomass during the end of the dry season but I detected no decline in NDVI at the peak of the growing season. My findings suggest that the area used by the irruptive elk population may have undergone changes in plant community composition favoring plants that were resistant to elk grazing.
Book Synopsis Population Ecology of Roosevelt Elk by : Butch Weckerly
Download or read book Population Ecology of Roosevelt Elk written by Butch Weckerly and published by University of Nevada Press. This book was released on 2017-09-27 with total page 316 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Roosevelt elk populate the parks along California’s north coast and comprise the largest land mammals in the parks, some weighing up to 1,200 pounds. They are a stable terrestrial land mammal population, a fixture in the parks, but still require ongoing stewardship and management. In a study spanning more than twenty years, Weckerly made key observations and conducted various investigations under a multitude of ecological conditions. Few authors have dedicated this much time and effort into a single research area. It is a testament to perseverance that his groundbreaking study of the Roosevelt elk was so successful. He was able to document the independent dynamics of several herds of female elk, experience the extinction of one of their subpopulations, and record scientific conclusions in the context of resiliency and redundancy of the elk population. This book will be of considerable interest to those who investigate the ecology of big game animals, including naturalists, hunters, and individuals with particular interest in Redwood State and National Parks. It is an important book that contributes substantially to the persistence and viability of Roosevelt elk in the parks and the surrounding area.
Book Synopsis Density-dependent Not -independent Factors Influence Roosevelt Elk Recruitment in the Bald HIlls of Redwood National Park by : Nicholas Ryan Kolbe
Download or read book Density-dependent Not -independent Factors Influence Roosevelt Elk Recruitment in the Bald HIlls of Redwood National Park written by Nicholas Ryan Kolbe and published by . This book was released on 2016 with total page 68 pages. Available in PDF, EPUB and Kindle. Book excerpt: Density-independent and -dependent factors are known to influence population dynamics of Roosevelt elk (Cervus elaphus roosevelti). The strength of influence of both kinds of factors depends on abundance relative to K carrying capacity. I examined the influence of density, climatic variables, and prescribed fire on juvenile recruitment in an elk population in Redwood National Park, California, USA, from 2002 to 2015. In the Park, prescribed fire is used to reduce conifer and redwood (Sequoia sempervirens) encroachment into meadows and is not used to manage elk habitat. Consequently, prescribed fire might have a density-independent influence on juvenile recruitment and population dynamics because it is implemented without regard to elk population dynamics. Fire is also known to increase elk food supplies, but whether fire might have a positive influence on recruitment depends on the population size relative to K. Using a time series of elk counts conducted during winter from 2002 to 2015, abundance of elk varied from 190 to 279. Output from a Gompertz state-space model and expectation from the standard logistic model estimated K to be between 275 and 340 over the course of the study period. An Akaike Information Criterion model selection analysis of 36 linear regressions estimating juvenile recruitment considered abundance, prescribed fire, and climatic influences. Population abundance alone had the strongest influence on juvenile recruitment. My findings may be affected by the population being below K carrying capacity during most of the time series analyzed. Furthermore, prescribed fire might not have influenced recruitment because of inconsistent burning.
Book Synopsis Theodore Roosevelt National Park (N.P.), Elk Management Plan by :
Download or read book Theodore Roosevelt National Park (N.P.), Elk Management Plan written by and published by . This book was released on 2010 with total page 660 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis The Colorado Front Range by : Thomas T. Veblen
Download or read book The Colorado Front Range written by Thomas T. Veblen and published by . This book was released on 1991 with total page 204 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Areas of Montana: 1960 written by and published by . This book was released on 1964 with total page 8 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Draft Environmental Impact Statement, Proposed Land and Resource Management Plan, Gifford Pinchot National Forest by :
Download or read book Draft Environmental Impact Statement, Proposed Land and Resource Management Plan, Gifford Pinchot National Forest written by and published by . This book was released on 1987 with total page 372 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Climate Change and Indigenous Peoples in the United States by : Julie Koppel Maldonado
Download or read book Climate Change and Indigenous Peoples in the United States written by Julie Koppel Maldonado and published by Springer. This book was released on 2014-04-05 with total page 178 pages. Available in PDF, EPUB and Kindle. Book excerpt: With a long history and deep connection to the Earth’s resources, indigenous peoples have an intimate understanding and ability to observe the impacts linked to climate change. Traditional ecological knowledge and tribal experience play a key role in developing future scientific solutions for adaptation to the impacts. The book explores climate-related issues for indigenous communities in the United States, including loss of traditional knowledge, forests and ecosystems, food security and traditional foods, as well as water, Arctic sea ice loss, permafrost thaw and relocation. The book also highlights how tribal communities and programs are responding to the changing environments. Fifty authors from tribal communities, academia, government agencies and NGOs contributed to the book. Previously published in Climatic Change, Volume 120, Issue 3, 2013.
Book Synopsis Yellowstone Bison by : Patrick James White
Download or read book Yellowstone Bison written by Patrick James White and published by . This book was released on 2015-05 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Using Science to Improve the BLM Wild Horse and Burro Program by : National Research Council
Download or read book Using Science to Improve the BLM Wild Horse and Burro Program written by National Research Council and published by National Academies Press. This book was released on 2013-10-04 with total page 399 pages. Available in PDF, EPUB and Kindle. Book excerpt: Using Science to Improve the BLM Wild Horse and Burro Program: A Way Forward reviews the science that underpins the Bureau of Land Management's oversight of free-ranging horses and burros on federal public lands in the western United States, concluding that constructive changes could be implemented. The Wild Horse and Burro Program has not used scientifically rigorous methods to estimate the population sizes of horses and burros, to model the effects of management actions on the animals, or to assess the availability and use of forage on rangelands. Evidence suggests that horse populations are growing by 15 to 20 percent each year, a level that is unsustainable for maintaining healthy horse populations as well as healthy ecosystems. Promising fertility-control methods are available to help limit this population growth, however. In addition, science-based methods exist for improving population estimates, predicting the effects of management practices in order to maintain genetically diverse, healthy populations, and estimating the productivity of rangelands. Greater transparency in how science-based methods are used to inform management decisions may help increase public confidence in the Wild Horse and Burro Program.
Book Synopsis The Scientific Basis for Conserving Forest Carnivores by : Leonard F. Ruggiero
Download or read book The Scientific Basis for Conserving Forest Carnivores written by Leonard F. Ruggiero and published by . This book was released on 1994 with total page 198 pages. Available in PDF, EPUB and Kindle. Book excerpt: This cooperative effort by USDA Forest Service Research and the National Forest System assesses the state of knowledge related to the conservation status of four forest carnivores in the western United States: American marten, fisher, lynx, and wolverine. The conservation assessment reviews the biology and ecology of these species. It also discusses management considerations stemming from what is known and identifies information needed. Overall, we found huge knowledge gaps that make it difficult to evaluate the species' conservation status.
Book Synopsis Forest Roads: A Synthesis of Scientific Information by :
Download or read book Forest Roads: A Synthesis of Scientific Information written by and published by DIANE Publishing. This book was released on 2001 with total page 120 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Bulletin - Royal Society of New Zealand by : Royal Society of New Zealand
Download or read book Bulletin - Royal Society of New Zealand written by Royal Society of New Zealand and published by . This book was released on 1985 with total page 516 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis Knowing Yellowstone by : Jerry Johnson
Download or read book Knowing Yellowstone written by Jerry Johnson and published by Rowman & Littlefield. This book was released on 2010-06-16 with total page 185 pages. Available in PDF, EPUB and Kindle. Book excerpt: Visitors to Yellowstone National Park are drawn to the spectacular scenery, unique thermal features, and the large numbers of wild animals easily observed in their natural habitat. The thoughtful visitor to the park cannot help but be captivated by the unparalleled breadth of scientific knowledge needed to understand the intricate interrelationships that make up the yellowstone landscape. Knowing Yellowstone explores how scientists discover what they know about America's first national park and the surrounding lands. The chapter authors are scientists who represent the best of their fields of study. The science they describe is leading the way to our understanding of complex ecosystems worldwide.
Book Synopsis A Snapshot of Women of the U.S. Geological Survey in STEM and Related Careers by : Susan C. Aragon-Long
Download or read book A Snapshot of Women of the U.S. Geological Survey in STEM and Related Careers written by Susan C. Aragon-Long and published by . This book was released on 2018-07 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:
Book Synopsis A Patriot's History of the United States by : Larry Schweikart
Download or read book A Patriot's History of the United States written by Larry Schweikart and published by Penguin. This book was released on 2004-12-29 with total page 1350 pages. Available in PDF, EPUB and Kindle. Book excerpt: For the past three decades, many history professors have allowed their biases to distort the way America’s past is taught. These intellectuals have searched for instances of racism, sexism, and bigotry in our history while downplaying the greatness of America’s patriots and the achievements of “dead white men.” As a result, more emphasis is placed on Harriet Tubman than on George Washington; more about the internment of Japanese Americans during World War II than about D-Day or Iwo Jima; more on the dangers we faced from Joseph McCarthy than those we faced from Josef Stalin. A Patriot’s History of the United States corrects those doctrinaire biases. In this groundbreaking book, America’s discovery, founding, and development are reexamined with an appreciation for the elements of public virtue, personal liberty, and private property that make this nation uniquely successful. This book offers a long-overdue acknowledgment of America’s true and proud history.
Book Synopsis Report of the Director of the National Park Service to the Secretary of the Interior for the Fiscal Year Ended ... by : United States. National Park Service
Download or read book Report of the Director of the National Park Service to the Secretary of the Interior for the Fiscal Year Ended ... written by United States. National Park Service and published by . This book was released on 1941 with total page 396 pages. Available in PDF, EPUB and Kindle. Book excerpt:
