Avian Community Responses to Juniper Woodland Structure and Thinning Treatments on the Colorado Plateau PDF Download
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Author: U.S. Department of the Interior Publisher: Createspace Independent Publishing Platform ISBN: 9781495958847 Category : Nature Languages : en Pages : 38
Book Description
Pinyon–juniper (Pinus spp.–Juniperus spp.) woodlands are estimated to cover 24 to 40 million hectares (ha; 59 to 99 million acres) in the Intermountain West and are distributed extensively across the Colorado Plateau (Samuels and Betancourt, 1982). The distribution of these woodlands has expanded and contracted throughout history (Tausch, 1999), and expansion is presently occurring at a high rate (Miller and Wigand, 1994). Possible catalysts to this rapid expansion include historical fire suppression and livestock grazing (Harris and others, 2003; Johnsen, 1962; Miller and Rose, 1999; West, 1984), coupled with climate change (Bradshaw and Reveal, 1943; Gray and others, 2006). Recently, drought associated with climate change, coupled with bark-beetle infestations, have resulted in large areas of pinyon mortality (Breshears and others, 2005).
Author: U.S. Department of the Interior Publisher: Createspace Independent Publishing Platform ISBN: 9781495958847 Category : Nature Languages : en Pages : 38
Book Description
Pinyon–juniper (Pinus spp.–Juniperus spp.) woodlands are estimated to cover 24 to 40 million hectares (ha; 59 to 99 million acres) in the Intermountain West and are distributed extensively across the Colorado Plateau (Samuels and Betancourt, 1982). The distribution of these woodlands has expanded and contracted throughout history (Tausch, 1999), and expansion is presently occurring at a high rate (Miller and Wigand, 1994). Possible catalysts to this rapid expansion include historical fire suppression and livestock grazing (Harris and others, 2003; Johnsen, 1962; Miller and Rose, 1999; West, 1984), coupled with climate change (Bradshaw and Reveal, 1943; Gray and others, 2006). Recently, drought associated with climate change, coupled with bark-beetle infestations, have resulted in large areas of pinyon mortality (Breshears and others, 2005).
Author: John M. Marzluff Publisher: A&C Black ISBN: 1408136929 Category : Nature Languages : en Pages : 264
Book Description
A flock of Pinyon Jays arrive in a flash of blue, and leave again just as suddenly. This once mysterious bird is now the subject of over 20 years of intensive research involving over one thousand colour-marked jays by Russell Balda, John Marzluff and their colleagues and helpers. This plain blue bird has turned out to be anything but plain in its biology and behaviour. Uniquely dependent on the seeds of the Pinyon Pine for food, they have developed a number of behavioural and morphological adaptations to best utilise this resource, above all caching enough seeds each autumn to supply their needs throughout the winter and fuel their unusual habit of nesting in late winter. Fluctuations in pine-seed supply, both by season and between years, poses special problems for these birds and has led to their extremely flexible and complex social system in which learning and memory play an unusually large part. They store pine seeds and retrieve them with uncanny accuracy; they form lifelong pair bonds and nest colonially, occasionally involving younger birds to help established pairs rear the young; and they use their large vocabulary to coordinate activities within one of the largest known avian societies. This intriguing story will fascinate both the enthusiastic amateur birder and the professional alike. Packed with information, it presents Pinyon Jay biology in a readable form and places them into the wider context of studies on bird ecology and evolution. Fine illustrations by Tony Angell, with additional pictures by Caroline Bauder, complete this attractive addition to any birder's bookshelf.
Author: Harold Mooney Publisher: Univ of California Press ISBN: 0520278801 Category : Nature Languages : en Pages : 1008
Book Description
This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.
Author: Steve Knick Publisher: Univ of California Press ISBN: 0520948688 Category : Science Languages : en Pages : 665
Book Description
Admired for its elaborate breeding displays and treasured as a game bird, the Greater Sage-Grouse is a charismatic symbol of the broad open spaces in western North America. Unfortunately these birds have declined across much of their range—which stretches across 11 western states and reaches into Canada—mostly due to loss of critical sagebrush habitat. Today the Greater Sage-Grouse is at the center of a complex conservation challenge. This multifaceted volume, an important foundation for developing conservation strategies and actions, provides a comprehensive synthesis of scientific information on the biology and ecology of the Greater Sage-Grouse. Bringing together the experience of thirty-eight researchers, it describes the bird’s population trends, its sagebrush habitat, and potential limitations to conservation, including the effects of rangeland fire, climate change, invasive plants, disease, and land uses such as energy development, grazing, and agriculture.
Author: U.S. Department of the Interior
Author: U.S. Department of the Interior
Author: Claire Crow
Author: 
Author: Kelly A. Williams-Sieg
Author: James D. McIver
Author: Suzanne M. Neal
Author: John M. Marzluff
Author: Henry L. Short
Author: Harold Mooney
Author: Steve Knick