Author: Steve F. JohnsonPublisher:
ISBN:
Category : Ground squirrels
Languages : en
Pages : 86
Book Description
Heart Rate as an Indicator of Metabolism in Free-living Uinta Ground Squirrels (spermophilus Armatus)
Author: Steve F. JohnsonPublisher:
ISBN:
Category : Ground squirrels
Languages : en
Pages : 86
Book Description
The Evolution of Senescence in the Tree of Life
Author: Richard P. SheffersonPublisher: Cambridge University Press
ISBN: 1108138608
Category : Science
Languages : en
Pages : 445
Book Description
The existing theories on the evolution of senescence assume that senescence is inevitable in all organisms. However, recent studies have shown that this is not necessarily true. A better understanding of senescence and its underlying mechanisms could have far-reaching consequences for conservation and eco-evolutionary research. This book is the first to offer interdisciplinary perspectives on the evolution of senescence in many species, setting the stage for further developments. It brings together new insights from a wide range of scientific fields and cutting-edge research done on a multitude of different animals (including humans), plants and microbes, giving the reader a complete overview of recent developments and of the controversies currently surrounding the topic. Written by specialists from a variety of disciplines, this book is a valuable source of information for students and researchers interested in ageing and life history traits and populations.
Hibernation and Torpor in Mammals and Birds
Author: Charles P LymanPublisher: Elsevier
ISBN: 0323138241
Category : Nature
Languages : en
Pages : 332
Book Description
Hibernation and Torpor in Mammals and Birds explores the physiological factors that control hibernation and torpor in birds and mammals. This text covers topics ranging from metabolism in hibernation to the role of endocrines, respiration and acid-base state in hibernation, and theories of hibernation. This book is comprised of 14 chapters and begins with an overview of some clear-cut definitions and why mammals and birds hibernate. The reader is then introduced to the variations from euthermia that have been observed among birds and mammals. To give some structure to this listing, the approach is phylogenetic, starting with the birds and proceeding through the primitive to the more advanced mammals. Subsequent chapters explains the process of entering hibernation and the hibernating state, itself; capability of a species in natural hibernation to arouse from that state using self-generated heat; physiological changes at the start of a spontaneous arousal; and physiological mechanisms underlying the ability of hibernators to rewarm. Consideration is also given to intermediary metabolism in hibernation, cold adaptation of metabolism in hibernators, and the response of hibernators to various extrinsic influences such as neoplastic growth, radiation injury, and parasitism and symbionts. This book will be of interest to students and researchers in fields ranging from zoology to physiology and biophysics.
The Season of Scarcity
Author: Windows into the Earth
Author: Robert B. SmithPublisher: Oxford University Press
ISBN: 0195355601
Category : Science
Languages : en
Pages : 255
Book Description
Millions of years ago, the North American continent was dragged over the world's largest continental hotspot, a huge column of hot and molten rock rising from the Earth's interior that traced a 50-mile wide, 500-mile-long path northeastward across Idaho. Generating cataclysmic volcanic eruptions and large earthquakes, the hotspot helped lift the Yellowstone Plateau to more than 7,000 feet and pushed the northern Rockies to new heights, forming unusually large glaciers to carve the landscape. It also created the jewel of the U.S. national park system: Yellowstone. Meanwhile, forces stretching apart the western U.S. created the mountainous glory of Grand Teton National Park. These two parks, with their majestic mountains, dazzling geysers, and picturesque hot springs, are windows into the Earth's interior, revealing the violent power of the dynamic processes within. Smith and Siegel offer expert guidance through this awe-inspiring terrain, bringing to life the grandeur of these geologic phenomena as they reveal the forces that have shaped--and continue to shape--the greater Yellowstone-Teton region. Over seventy illustrations--including fifty-two in full color--illuminate the breathtaking beauty of the landscape, while two final chapters provide driving tours of the parks to help visitors enjoy and understand the regions wonders. Fascinating and informative, this book affords us a striking new perspective on Earth's creative forces.
Biology and Management of the Western Gray Squirrel and Oregon White Oak Woodlands
Author: Loreen A. RyanPublisher:
ISBN:
Category : Endangered species
Languages : en
Pages : 44
Book Description
Red-cockaded Woodpecker
Author: Ralph CostaPublisher: Surrey, B.C. : Hancock House
ISBN:
Category : Nature
Languages : en
Pages : 754
Book Description
Populations of the red-cockaded woodpecker (Picoides borealis) have experienced massive declines since European colonization of North America. This is due to extensive habitat loss and alteration. Logging of old-growth pine forests and alteration of the fire regime throughout the historic range of the species were the primary causes of population decline. Listing of the red-cockaded woodpecker under the Endangered Species Act of 1973, as amended, and increased emphasis on management of non-game species have resulted in efforts to recover remnant populations of the red-cockaded woodpecker in many parts of its historic range. Due to extensive research and adaptive management initiatives much is now known about the elements required for both short- and long-term management of viable populations of red-cockaded woodpeckers. A short-term strategy is crucial because currently available habitat, in nearly all populations, is poor in 1 or more critical respects. Consequently, almost all populations require immediate attention in the short term, to insure suitable midstory and understory conditions, adequate availability of suitable cavities, and restoration of demographic viability through improvements in number and distribution of breeding groups. Management techniques including artificial cavities, cavity entrance restrictors, translocation of birds, prescribed fire, and mechanical and chemical control of woody vegetation are available to achieve these needs. In the long term, cost-effective management of red-cockaded woodpecker populations requires a timber management program and prescribed fire regime that will produce and maintain the stand structure characteristic of high quality nesting and foraging habitat, so that additional intensive management specific to the woodpeckers is no longer necessary. Timber management that achieves this goal and still allows substantial timber harvest is feasible. The implementation of a red-cockaded woodpecker management strategy, as outlined above, represents appropriate ecosystem management in the fire-maintained pine ecosystems of the southeastern United States and will ultimately benefit a great number of additional species of plants and animals adapted to this ecosystem.
Old Yellowstone Days
Author: Paul SchulleryPublisher: UNM Press
ISBN: 0826347533
Category : History
Languages : en
Pages : 258
Book Description
Over thirty years after its original publication, former Yellowstone National Park archivist Paul Schullery's collection of travelers' accounts of their visits to the first national park still resonates with the tremendous impact the Park has had--and continues to have--as a wilderness and recreation destination. From John Muir's exultation of the beauty of "Wonderland" to Rudyard Kipling's hilarious invective of the American tourist, Old Yellowstone Days includes selections which form the best picture of what Yellowstone must have been like before the intrusion of the automobile. Updated with a new introduction by Schullery, new illustrations, and a new foreword by Yellowstone National Park Historian Lee Whittlesey, this volume, which takes its title from an article by Owen Wister, also includes the impressions of William O. Owen, Charles Dudley Warner, Theodore Roosevelt, John Burroughs, Mrs. George Cowan, George Anderson, Emerson Hough, and Frederic Remington.
Searching for Yellowstone
Author: Paul SchulleryPublisher: Montana Historical Society
ISBN: 9780972152211
Category : History
Languages : en
Pages : 364
Book Description
Schullery's book details the ecological history of Yellowstone National Park.
Author: