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Author: Sarah Kelly McMenamin
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 214
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Author: Edward D. Koch
Publisher:
ISBN: 9781932871081
Category :
Languages : en
Pages : 0
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Book Description
This book gives an indepth review of the tweleve native species, plus four potential species occurring in these parks. A review of the environment is also included.
Author: Sarah Kelly McMenamin
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 214
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Author: Paul E. Bartelt
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 18
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Book Description
The ability to predict amphibian breeding across landscapes is important for informing land management decisions and helping biologists better understand and remediate factors contributing to declines in amphibian populations. We built geospatial models of likely breeding habitats for each of four amphibian species that breed in Yellowstone National Park (YNP). We used field data collected in 2000?2002 from 497 sites among 16 basins and predictor variables from geospatial models produced from remotely sensed data (e.g., digital elevation model, complex topographic index, landform data, wetland probability, and vegetative cover). Except for 31 sites in one basin that were surveyed in both 2000 and 2002, all sites were surveyed once. We used polytomous regression to build statistical models for each species of amphibian from (1) field survey site data only, (2) field data combined with data from geospatial models, and (3) data from geospatial models only. Based on measures of receiver operating characteristic (ROC) scores, models of the second type best explained likely breeding habitat because they contained the most information (ROC values ranged from 0.70 to 0.88). However, models of the third type could be applied to the entire YNP landscape and produced maps that could be verified with reserve field data. Accuracy rates for models built for single years were highly variable, ranging from 0.30 to 0.78. Accuracy rates for models built with data combined from multiple years were higher and less variable, ranging from 0.60 to 0.80. Combining results from the geospatial multiyear models yielded maps of ?core? breeding areas (areas with high probability values for all three years) surrounded by areas that scored high for only one or two years, providing an estimate of variability among years. Such information can highlight landscape options for amphibian conservation. For example, our models identify alternative areas that could be protected for each species, including 6828?10 764 ha for tiger salamanders, 971?3017 ha for western toads, 4732?16 696 ha for boreal chorus frogs, and 4940?19 690 ha for Columbia spotted frogs.
Author: William R. Gould
Publisher:
ISBN:
Category : Colonization
Languages : en
Pages : 11
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Book Description
Monitoring of natural resources is crucial to ecosystem conservation, and yet it can pose many challenges. Annual surveys for amphibian breeding occupancy were conducted in Yellowstone and Grand Teton National Parks over a 4-year period (2006?2009) at two scales: catchments (portions of watersheds) and individual wetland sites. Catchments were selected in a stratified random sample with habitat quality and ease of access serving as strata. All known wetland sites with suitable habitat were surveyed within selected catchments. Changes in breeding occurrence of tiger salamanders, boreal chorus frogs, and Columbia-spotted frogs were assessed using multi-season occupancy estimation. Numerous a priori models were considered within an information theoretic framework including those with catchment and site-level covariates. Habitat quality was the most important predictor of occupancy. Boreal chorus frogs demonstrated the greatest increase in breeding occupancy at the catchment level. Larger changes for all 3 species were detected at the finer site-level scale. Connectivity of sites explained occupancy rates more than other covariates, and may improve understanding of the dynamic processes occurring among wetlands within this ecosystem. Our results suggest monitoring occupancy at two spatial scales within large study areas is feasible and informative.
Author: United States. National Park Service
Publisher:
ISBN:
Category : Animals
Languages : en
Pages : 434
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Author: National Park Service
Publisher: CreateSpace
ISBN: 9781492156338
Category : Nature
Languages : en
Pages : 48
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Book Description
Concerns about amphibians have escalated since population declines became apparent in diverse areas around the world in the 1980s (Collins and Storfer 2003). Systematic examinations have revealed that in some regions, including North America, rapid declines probably began around the middle of the 20th century, with the rate of decline increasing in the 1990s (Houlahan et al. 2000; Alford et al. 2001). Worldwide, 32% of amphibian species are now threatened with extinction, while 43% exhibit some form of population decrease (Stuart et al. 2004). Amidst the rapid and general decline in global biodiversity, amphibian population extinctions and declines are particularly alarming because they are occurring not only where habitat has been lost, but also in natural, protected areas.
Author: Robert A. Garrott
Publisher: Academic Press
ISBN: 0080921051
Category : Science
Languages : en
Pages : 712
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Book Description
This book is an authoritative work on the ecology of some of America's most iconic large mammals in a natural environment - and of the interplay between climate, landscape, and animals in the interior of the world's first and most famous national park.Central Yellowstone includes the range of one of the largest migratory populations of bison in North America as well as a unique elk herd that remains in the park year round. These populations live in a varied landscape with seasonal and often extreme patterns of climate and food abundance. The reintroduction of wolves into the park a decade ago resulted in scientific and public controversy about the effect of large predators on their prey, a debate closely examined in the book. Introductory chapters describe the geography, geology and vegetation of the ecosystem. The elk and bison are then introduced and their population ecology described both pre- and post– wolf introduction, enabling valuable insights into the demographic and behavioral consequences for their ungulate prey. Subsequent chapters describe the wildlife-human interactions and show how scientific research can inform the debate and policy issues surrounding winter recreation in Yellowstone. The book closes with a discussion of how this ecological knowledge can be used to educate the public, both about Yellowstone itself and about science, ecology and the environment in general. Yellowstone National Park exemplifies some of the currently most hotly debated and high-profile ecological, wildlife management, and environmental policy issues and this book will have broad appeal not only to academic ecologists, but also to natural resource students, managers, biologists, policy makers, administrators and the general public. - Unrivalled descriptions of ecological processes in a world famous ecosystem, based on information from 16 years of painstaking field work and collaborations among 66 scientists and technical experts and 15 graduate studies - Detailed studies of two charismatic North American herbivore species – elk and bison - Description of the restoration of wolves into central Yellowstone and their ecological interactions with their elk and bison prey - Illustrated with numerous evocative colour photographs and stunning maps
Author: Frank Hall Knowlton
Publisher: Good Press
ISBN:
Category : Nature
Languages : en
Pages : 49
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Book Description
In 'Fossil Forests of the Yellowstone National Park' by Frank Hall Knowlton, readers are treated to a detailed exploration of the ancient forests preserved within the renowned national park. Knowlton's book meticulously examines the fossilized remains of trees and plants, providing a unique window into the prehistoric botanical landscape of Yellowstone. Through his vivid descriptions and insightful analysis, Knowlton brings to life the rich history of these fossil forests, shedding light on their ecological significance and the geological processes that have shaped them over time. This work is a valuable contribution to the field of paleobotany, offering a comprehensive study of the fossilized flora of Yellowstone in a scholarly yet accessible manner. Readers will appreciate Knowlton's passion for the subject and his ability to convey complex scientific concepts in an engaging way. Frank Hall Knowlton, a renowned paleontologist and botanist, draws on his expertise in paleobotany to delve into the fossil forests of Yellowstone National Park. His extensive research and deep knowledge of ancient plant life enrich the narrative, providing readers with a thorough understanding of the botanical history preserved within the park. Knowlton's dedication to his field is evident throughout the book, making him a trusted authority on the subject matter. I highly recommend 'Fossil Forests of the Yellowstone National Park' to readers interested in paleobotany, geology, and natural history. This book offers a fascinating glimpse into the ancient past of one of America's most iconic national parks, presenting a wealth of scientific insights combined with captivating storytelling. Knowlton's expertise and passion for his subject make this a must-read for anyone curious about the botanical treasures hidden within Yellowstone.
Author: Frederick B. Turner
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 40
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Book Description
Author: Debra A. Patla
Publisher:
ISBN:
Category : Amphibians
Languages : en
Pages : 16
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Book Description
