Foraging Behavior And Niche Relationships Of Breeding American Redstarts Setophaga Ruticilla And Least Flycatchers Empidonax Minimus
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Foraging Behavior And Niche Relationships Of Breeding American Redstarts Setophaga Ruticilla And Least Flycatchers Empidonax Minimus
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Author : Thomas W. Sherry
language : en
Publisher:
Release Date : 1975
Foraging Behavior And Niche Relationships Of Breeding American Redstarts Setophaga Ruticilla And Least Flycatchers Empidonax Minimus written by Thomas W. Sherry and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1975 with categories.
Proceedings Of The International Ornithological Congress
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Author : International Ornithological Congress
language : en
Publisher:
Release Date : 1978
Proceedings Of The International Ornithological Congress written by International Ornithological Congress and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1978 with Ornithology categories.
Migrant Birds In The Neotropics
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Author : Allen Keast
language : en
Publisher: Smithsonian Books (DC)
Release Date : 1980
Migrant Birds In The Neotropics written by Allen Keast and has been published by Smithsonian Books (DC) this book supported file pdf, txt, epub, kindle and other format this book has been release on 1980 with Nature categories.
Rocky Mountain Birds
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Author : Paul Johnsgard
language : en
Publisher: Lulu.com
Release Date : 2011-11-04
Rocky Mountain Birds written by Paul Johnsgard and has been published by Lulu.com this book supported file pdf, txt, epub, kindle and other format this book has been release on 2011-11-04 with Nature categories.
"Part I outlines the habitats, ecology, and bird geography of the Rocky Mountains north of the New Mexico-Colorado border, including recent changes in the ecology and avifauna of the region. It provides detailed lists of major birding locations and guidance about where to search for specific Rocky Mountain birds. Part 2 considers all 328 regional species individually, with information on their status, habitats and ecology, suggested viewing locations, and population."--Back cover
Ecological Isolation In Birds
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Author : David Lack
language : en
Publisher:
Release Date : 1971
Ecological Isolation In Birds written by David Lack and has been published by this book supported file pdf, txt, epub, kindle and other format this book has been release on 1971 with Nature categories.
Beavers Boreal Ecosystem Engineers
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Author : Carol A. Johnston
language : en
Publisher: Springer
Release Date : 2017-08-28
Beavers Boreal Ecosystem Engineers written by Carol A. Johnston and has been published by Springer this book supported file pdf, txt, epub, kindle and other format this book has been release on 2017-08-28 with Science categories.
Bridging the fields of ecosystem science and landscape ecology, this book integrates Dr. Carol Johnston's research on beaver ecosystem alteration at Voyageurs National Park. The findings about the vegetation, soils, and chemistry of beaver impoundments synthesized in the text provide a cohesive reference useful to wetland scientists, ecosystems and landscape ecologysts, wildlife managers, and students. The beaver, Castor canadensis, is an ecosystem engineer unequaled in its capacity to alter landscapes through browsing and dam building, whose population recovery has re-established environmental conditions that probably existed for millenia prior to its near extirpation by trapping in the 1800s and 1900s. Beavers continue to regain much of their natural range throughout North America, changing stream and forest ecosystems in ways that may be lauded or vilified. Interest in beavers by ecologists remains keen as new evidence emerges about the ecological, hydrological, and biogeochemical effects of beaver browsing and construction. There is a critical need for ecologists and land managers to understand the potential magnitude, persistence, and ecosystem services of beaver landscape transformation. The 88-year record of beaver landscape occupation and alteration documented by Dr. Carol Johnston and colleagues from aerial photography and field work provides a unique resource toward understanding the ecosystem effects and sustainability of beaver activity.
Populations In A Seasonal Environment
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Author : Stephen D. Fretwell
language : en
Publisher: Princeton University Press
Release Date : 1972-07-21
Populations In A Seasonal Environment written by Stephen D. Fretwell and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1972-07-21 with Science categories.
Most organisms live in a seasonal environment. During their life cycles, some species face seasons of cold and heat, aridity and abundant rainfall, migration and stable residence, breeding and nonbreeding. Populations grow and decline as supplies of materials essential to their survival wax and wane. Such qualitative truths as these flow obviously from field observations. In this original monograph, Stephen Fretwell analyzes the highly complex interaction between a population and a regularly varying environment in an attempt to define and measure seasonality as a critical parameter in the general theory of population regulation. Concerned primarily with the size and the habitat distribution of populations, Professor Fretwell develops simple models that, when applied to specific populations, usually of birds, demonstrate the effect of seasonal variations on the regulation of populations. He maintains that seasonality, as a concept, is essential to a full understanding of environmental interaction. During the course of his exposition, the author offers several new hypotheses, including theories affecting the breeding, numbers, distribution, and diversity of wintering birds, and a theory affecting the body size of sparrows.
Atlas Of Breeding Birds Of The Maritime Provinces
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Author : Anthony J. Erskine
language : en
Publisher: Nimbus Pub Limited
Release Date : 1992-01-01
Atlas Of Breeding Birds Of The Maritime Provinces written by Anthony J. Erskine and has been published by Nimbus Pub Limited this book supported file pdf, txt, epub, kindle and other format this book has been release on 1992-01-01 with Atlas categories.
The Atlas features over 200 maps that provide information on breeding distribution, population, and natural history, with a forecast of each species' prospects for the future.
A Neotropical Companion
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Author : John C. Kricher
language : en
Publisher: Princeton University Press
Release Date : 1997
A Neotropical Companion written by John C. Kricher and has been published by Princeton University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1997 with Nature categories.
Widely praised, "A Neotropical Companion" is an extraordinarily readable introduction to the American tropics, the lands of Central and South America, their rainforests and other ecosystems, and the creatures that live there. 177 color illustrations.
Neotropical Migratory Birds
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Author : Richard M. DeGraaf
language : en
Publisher: Cornell University Press
Release Date : 1995
Neotropical Migratory Birds written by Richard M. DeGraaf and has been published by Cornell University Press this book supported file pdf, txt, epub, kindle and other format this book has been release on 1995 with Nature categories.
Thrushes, warblers, vireos, and tanagers are probably the most familiar of the Neotropical migrants--birds that breed in the United States and Canada, then journey to spend the winter in the Caribbean, Mexico, or southward. But this extraordinary group actually comprises a large number of diverse species, including waterfowl, shorebirds, terns, hawks, flycatchers, and hummingbirds. In their compendious review of information on these birds, Richard M. DeGraaf and John H. Rappole illuminate the need for a thorough understanding of the ecology of each species, one that exte4nds throughout the entire life cycle. The authors argue convincingly that conservation efforts must be based on such an understanding and carried out across a species' range--not limited to the breeding grounds. This book is the first to summarize in one volume much-needed practical data about the distribution and breeding habitat requirements of migratory birds in North and South America. The body of the book consists of natural history accounts of more than 350 species of Neotropical migrants, including a brief description of each bird's range, status, habitats on breeding grounds, nest site, and wintering areas. The authors provide a complete range map of each species' distribution in the Western Hemisphere as well as notes on the distribution--basic data that until recently have largely been unavailable in usable form to ornithologists and land and resource managers. An appendix lists species that are increasing or decreasing at significant rates in various physiographic regions of North America.