Are you looking for read ebook online? Search for your book and save it on your Kindle device, PC, phones or tablets. Download Escaping the Extinction Vortex PDF full book. Access full book title Escaping the Extinction Vortex by Heather Elizabeth Johnson. Download full books in PDF and EPUB format.
Author: Heather Elizabeth Johnson Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 229
Book Description
An extinction vortex is one of the greatest threats to endangered species; when demographic, environmental, and genetic stochasticity interact with each other and with deterministic factors, such as habitat quality, to reinforce the demise of a small population. To successfully escape an extinction vortex and enable species recovery, all processes that affect endangered populations should be comprehensively assessed and incorporated into conservation plans. For my dissertation, I worked in conjunction with California Department of Fish and Game to develop a comprehensive research program to guide recovery efforts for federally endangered Sierra Nevada bighorn sheep, the rarest subspecies of mountain sheep in North America. I initiated a combination of demographic, habitat and genetic analyses to identify the stochastic and deterministic factors limiting the recovery of this subspecies, examine the relative and synergistic impacts of these factors on the performance of Sierra Nevada bighorn sheep, and the benefits of different management activities for stimulating recovery efforts. Just as the extinction vortex predicts, I found that small populations of Sierra Nevada bighorn sheep were driven by a number of stochastic and deterministic processes. Demographic, habitat, climate, predation, and genetic factors operated singly and in concert to shape the overall viability of this subspecies. The interaction of factors led to atypical demographic patterns that deviated from theoretical expectations and increased extinction risk. To alleviate extinction processes, I found that management strategies must be tailored to population-specific dynamics, targeting those vital rates and ecological drivers which have the greatest power to increase performance. Results from this study have elucidated critical aspects of Sierra Nevada bighorn sheep ecology, provided a recovery strategy for this subspecies, and supplied new quantitative tools for examining the dynamics of small and endangered populations. Ultimately, this work offers an example of assessing population viability, not in terms of probability of extinction, but in terms of quantifying conservation measures that will alleviate extinction dynamics and achieve endangered species recovery goals.
Author: Heather Elizabeth Johnson Publisher: ISBN: Category : Electronic dissertations Languages : en Pages : 229
Book Description
An extinction vortex is one of the greatest threats to endangered species; when demographic, environmental, and genetic stochasticity interact with each other and with deterministic factors, such as habitat quality, to reinforce the demise of a small population. To successfully escape an extinction vortex and enable species recovery, all processes that affect endangered populations should be comprehensively assessed and incorporated into conservation plans. For my dissertation, I worked in conjunction with California Department of Fish and Game to develop a comprehensive research program to guide recovery efforts for federally endangered Sierra Nevada bighorn sheep, the rarest subspecies of mountain sheep in North America. I initiated a combination of demographic, habitat and genetic analyses to identify the stochastic and deterministic factors limiting the recovery of this subspecies, examine the relative and synergistic impacts of these factors on the performance of Sierra Nevada bighorn sheep, and the benefits of different management activities for stimulating recovery efforts. Just as the extinction vortex predicts, I found that small populations of Sierra Nevada bighorn sheep were driven by a number of stochastic and deterministic processes. Demographic, habitat, climate, predation, and genetic factors operated singly and in concert to shape the overall viability of this subspecies. The interaction of factors led to atypical demographic patterns that deviated from theoretical expectations and increased extinction risk. To alleviate extinction processes, I found that management strategies must be tailored to population-specific dynamics, targeting those vital rates and ecological drivers which have the greatest power to increase performance. Results from this study have elucidated critical aspects of Sierra Nevada bighorn sheep ecology, provided a recovery strategy for this subspecies, and supplied new quantitative tools for examining the dynamics of small and endangered populations. Ultimately, this work offers an example of assessing population viability, not in terms of probability of extinction, but in terms of quantifying conservation measures that will alleviate extinction dynamics and achieve endangered species recovery goals.
Author: Eric Mark Kramer Publisher: ISBN: 9781612891385 Category : Extinction (Biology) Languages : en Pages : 0
Book Description
A study of the anthropic epoch and the extinction vortex we are witnessing. Currently a mass extinction of species is occurring. At the same time a mass extinction of languages and cultures is also occurring. These two mass extinctions, biological and cultural, are linked.
Author: Eric M. Kramer Publisher: ISBN: 9781612891392 Category : Language Arts & Disciplines Languages : en Pages : 383
Book Description
An unprecedented mass extinction of cultures and species is linked to a single technological attitude and mode of communicating with cultural and physical environment
Author: Richard J. Nevle Publisher: Cornell University Press ISBN: 150176280X Category : Nature Languages : en Pages : 190
Book Description
In The Paradise Notebooks, Richard J. Nevle and Steven Nightingale take us across the spectacular Sierra Nevada mountain range on a journey illuminated by incandescent poetry and fascinating fact. Over the course of twenty-one pairs of short essays, Nevle and Nightingale contemplate the natural phenomena found in the Sierra Nevada. From granite to aspen, to fire, to a rare, endemic species of butterfly, these essay pairs explore the natural history and mystical wonder of each element with a balanced and captivating touch. As they weave in vignettes from their ninety-mile backpacking trip across the range, Nevle and Nightingale powerfully reconceive the Sierra Nevada as both earthly matter and transcendental offering, letting us into a reality in which nature holds just as much spiritual importance as it does physical. In a time of rapid environmental degradation, The Paradise Notebooks offers a way forward—a whole-minded, learned, loving attention to place that rekindles our joyful relationship with the living world.
Author: Charlotte Lindqvist Publisher: Springer ISBN: 3030047539 Category : Science Languages : en Pages : 432
Book Description
Advances in genome-scale DNA sequencing technologies have revolutionized genetic research on ancient organisms, extinct species, and past environments. When it is recoverable after hundreds or thousands of years of unintended preservation, “ancient DNA” (or aDNA) is often highly degraded, necessitating specialized handling and analytical approaches. Paleogenomics defines the field of reconstructing and analyzing the genomes of historic or long-dead organisms, most often through comparison with modern representatives of the same or similar species. The opportunity to isolate and study paleogenomes has radically transformed many fields, spanning biology, anthropology, agriculture, and medicine. Examples include understanding evolutionary relationships of extinct species known only from fossils, the domestication of plants and animals, and the evolution and geographical spread of certain pathogens. This pioneering book presents a snapshot view of the history, current status, and future prospects of paleogenomics, taking a broad viewpoint that covers a range of topics and organisms to provide an up-to-date status of the applications, challenges, and promise of the field. This book is intended for a variety of readerships, including upper-level undergraduate and graduate students, professionals and experts in the field, as well as anyone excited by the extraordinary insights that paleogenomics offers.
Author: Ross Barnett Publisher: Bloomsbury Publishing ISBN: 1472957334 Category : Nature Languages : en Pages : 361
Book Description
Britain's lynx are missing, and they have been for more than a thousand years. Why have they gone? And might they come back? Britain was a very different place 15,000 years ago – home to lions, lynx, bears, wolves, bison and many more megafauna. But as its climate changed and human populations expanded, most of early Britain's largest mammals disappeared. Will advances in science and technology mean that we can one day bring these mammals back? And should we? In The Missing Lynx, palaeontologist Ross Barnett uses case studies, new fossil discoveries and biomolecular evidence to paint a picture of these lost species and to explore the ecological significance of their disappearance. He discusses how the Britons these animals shared their lives with might have viewed them and investigates why some species survived while others vanished. Barnett also looks in detail at the realistic potential of reintroductions, rewilding and even of resurrection in Britain and overseas, from the successful return of beavers in Argyll to the revolutionary Pleistocene Park in Siberia, which has already seen progress in the revival of 'mammoth steppe' grassland. As widespread habitat destruction, climate change and an ever-growing human population lead us inexorably towards the sixth extinction, this timely book explores the spaces that extinction has left unfilled. And by helping us to understand why some of our most charismatic animals are gone, Ross Barnett encourages us to look to a brighter future, one that might see these missing beasts returned to the land on which they once lived and died.
Author: Stefano B. Longo Publisher: Rutgers University Press ISBN: 0813565790 Category : Business & Economics Languages : en Pages : 275
Book Description
Winner of the 2017 Paul Sweezy Marxist Sociology Book Award from the American Sociological Association Although humans have long depended on oceans and aquatic ecosystems for sustenance and trade, only recently has human influence on these resources dramatically increased, transforming and undermining oceanic environments throughout the world. Marine ecosystems are in a crisis that is global in scope, rapid in pace, and colossal in scale. In The Tragedy of the Commodity, sociologists Stefano B. Longo, Rebecca Clausen, and Brett Clark explore the role human influence plays in this crisis, highlighting the social and economic forces that are at the heart of this looming ecological problem. In a critique of the classic theory “the tragedy of the commons” by ecologist Garrett Hardin, the authors move beyond simplistic explanations—such as unrestrained self-interest or population growth—to argue that it is the commodification of aquatic resources that leads to the depletion of fisheries and the development of environmentally suspect means of aquaculture. To illustrate this argument, the book features two fascinating case studies—the thousand-year history of the bluefin tuna fishery in the Mediterranean and the massive Pacific salmon fishery. Longo, Clausen, and Clark describe how new fishing technologies, transformations in ships and storage capacities, and the expansion of seafood markets combined to alter radically and permanently these crucial ecosystems. In doing so, the authors underscore how the particular organization of social production contributes to ecological degradation and an increase in the pressures placed upon the ocean. The authors highlight the historical, political, economic, and cultural forces that shape how we interact with the larger biophysical world. A path-breaking analysis of overfishing, The Tragedy of the Commodity yields insight into issues such as deforestation, biodiversity loss, pollution, and climate change.
Author: Anna Sher Publisher: Oxford University Press ISBN: 0197564372 Category : Biodiversity Languages : en Pages : 525
Book Description
"An Introduction to Conservation Biology is well suited for a wide range of undergraduate courses, as both a primary text for conservation biology courses and a supplement for ecological and environmental science courses. This new edition focuses on engaging students through videos and activities, and includes new pedagogy to scaffold students' learning. Coverage of recent conservation biology events in the news-such as global climate change and sustainable development-keeps the content fresh and current"--
Author: Heather Elizabeth Johnson
Author: Heather Elizabeth Johnson
Author: Eric Mark Kramer
Author: Eric M. Kramer
Author: Richard J. Nevle
Author: Charlotte Lindqvist
Author: Ross Barnett
Author: Stefano B. Longo
Author: 
Author: Anna Sher
Author: David Whyte Macdonald