Download or read book Some Adaptations of Marsh Nesting Blackbirds MPB 14 Volume 14 written by Gordon H. Orians and published by Princeton University Press. This book was released on 2020-03-31 with total page 313 pages. Available in PDF, EPUB and Kindle. Book excerpt: The variety of social systems among the New World blackbirds (Family Icteridae) and the structural simplicity of their foraging environment provide excellent opportunities for testing theorics about the adaptive significance of their behavior. Here Gordon Orians presents the results of his many years of research on how blackbirds utilize their marsh environments during the breeding season. These results stem from information he gathered on three species during ten breeding seasons in the Pacific Northwest, on Red-winged blackbirds during two breeding seasons in Costa Rica, and on three species during one breeding season in Argentina. The author uses models derived from Darwin's theory of natural selection to predict the behavior and morphology of individuals as well as the statistical properties of their populations. First he tests models that predict habitat selection, foraging behavior, territoriality, and mate selection. Then he considers some population patterns, especially range of use of environmental resources and overlap among species, that may result from those individual attributes. Professor Orianns concludes with an overview of the structure of bird communities in marshes of the world and the relation of these patterns to overall source availability in these simple but productive habitats.
Download or read book The Publishers Trade List Annual written by and published by . This book was released on 1986 with total page 1186 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Biodiversity Atlas of British Columbia written by M. A. Austin and published by . This book was released on 2009 with total page 164 pages. Available in PDF, EPUB and Kindle. Book excerpt: With sixty descriptive maps and accompanying text, The Biodiversity Atlas of British Columbia provides a broad overview of the province?s range of terrestrial and freshwater biological diversity. Bringing together data from numerous sources summarized in map form, the Atlas provides a window to B.C.?s diverse ecosystems, the species that live in them, and the elements of British Columbia?s biodiversity that make it globally significant. The Atlas also presents a visual perspective of a number of human-induced threats, including climate change, affecting biodiversity in B.C. today. The Atlas is designed to serve as a companion document to Taking Nature?s Pulse: The Status of Biodiversity in British Columbia ? a comprehensive scientific assessment of biodiversity in the province. Both the Atlas and Taking Nature?s Pulse are projects of Biodiversity BC, a partnership of conservation groups and government agencies.
Download or read book Wildlife Ecotoxicology written by John E. Elliott and published by Springer Science & Business Media. This book was released on 2011-08-27 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt: Many books have now been published in the broad field of environmental toxicology. However, to date, none of have presented the often fascinating stories of the wildlife science, and the steps along the way from discovery of problems caused by environmental pollutants to the regulatory and non-regulatory efforts to address the problems. This book provides case by case examinations of how toxic chemical effects on wildlife have brought about policy and regulatory decisions, and positive changes in environmental conditions. Wild animal stories, whether they are about the disappearance of charismatic top predators, or of grossly deformed embryos or frogs, provide powerful symbols that can and have captured the public's imagination and have resulted in increased awareness by decision makers. It is the intent of this book to present factual and balanced overviews and summaries of the science and the subsequent regulatory processes that followed to effect change (or not). We cover a variety of chemicals and topics beginning with an update of the classic California coastal DDT story of eggshell thinning and avian reproduction to more recent cases, such as the veterinarian pharmaceutical that has brought three species of Asian vultures to the brink of extinction. Researchers, regulators, educators, NGOs and the general public will find valuable insights into the processes and mechanisms involved both in environmental scientific investigation and in efforts to effect positive change.
Download or read book Hormonally Active Agents in the Environment written by National Research Council and published by National Academies Press. This book was released on 2000-02-03 with total page 453 pages. Available in PDF, EPUB and Kindle. Book excerpt: Some investigators have hypothesized that estrogens and other hormonally active agents found in the environment might be involved in breast cancer increases and sperm count declines in humans as well as deformities and reproductive problems seen in wildlife. This book looks in detail at the science behind the ominous prospect of "estrogen mimics" threatening health and well-being, from the level of ecosystems and populations to individual people and animals. The committee identifies research needs and offers specific recommendations to decision-makers. This authoritative volume: Critically evaluates the literature on hormonally active agents in the environment and identifies known and suspected toxicologic mechanisms and effects of fish, wildlife, and humans. Examines whether and how exposure to hormonally active agents occursâ€"in diet, in pharmaceuticals, from industrial releases into the environmentâ€"and why the debate centers on estrogens. Identifies significant uncertainties, limitations of knowledge, and weaknesses in the scientific literature. The book presents a wealth of information and investigates a wide range of examples across the spectrum of life that might be related to these agents.
Download or read book Habitat Suitability Index Models and Instream Flow Suitability Curves written by Richard L. Schroeder and published by . This book was released on 1985 with total page 24 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Red cockaded Woodpecker written by Richard Conner and published by University of Texas Press. This book was released on 2010-06-28 with total page 400 pages. Available in PDF, EPUB and Kindle. Book excerpt: Though small among its woodpecker relatives, the Red-cockaded Woodpecker poses a huge dilemma for its human neighbors. Uniquely adapted to live in the old-growth pine forests of the southeastern United States, the Red-cockaded Woodpecker has nearly disappeared as the forests have been cleared for agricultural, commercial, and residential uses over the last two centuries. Today, it waits at a crossroads. Scientific management practices could restore the woodpecker's habitat and population, but the imperative to convert old-growth forests to other uses remains. In this book, three of the leading experts on the Red-cockaded Woodpecker offer a comprehensive overview of all that is currently known about its biology and natural history and about the ecology of the fire-maintained forests it requires for survival. As the most visible endangered species in the Southeast, and the one whose conservation impacts the largest land area, the Red-cockaded Woodpecker holds a compelling interest not only for ornithologists, but also for wildlife managers, foresters, developers, environmentalists, and government officials. For all of these groups, this book will be the essential resource for learning more about the Red-cockaded Woodpecker and ensuring its survival.
Download or read book A Grammar of the Spanish Language written by Auguste-Louis Josse and published by . This book was released on 1842 with total page 476 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Conservation Biology Principles for Forested Landscapes written by Joan Voller and published by UBC Press. This book was released on 2011-11-01 with total page 261 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is intended to provide information to those who wish to interact with the landbase in an ecologically sustainable manner. Practitioners charged with the administration of land-based programs in industry and government will find the information presented useful. It should also be a resource for many community groups involved in land-use decision-making. Humans continue to use forests and make decisions about land use without perfect information. Conservation Biology Principles for Forested Landscapes is intended to enable the improvement of planning and decison-making processes by providing ecological information on issues of forest use. Current approaches are not working. Where information exists on new, ecologically sustainable approaches, practitioners should switch. Where the information on a better approach is not yet available, practitioners should replace the current, inappropriate approach with a variety of flexible ones that offer the opportunity to change with new knowledge.
Download or read book Boneland written by Alan Garner and published by HarperCollins UK. This book was released on 2012-08-30 with total page 144 pages. Available in PDF, EPUB and Kindle. Book excerpt: A major novel from one of the country’s greatest writers, and the crowning achievement of an astonishing career, ‘Boneland’ is also the long-awaited conclusion to the story of Colin and Susan – a story that began over fifty years ago in ‘The Weirdstone of Brisingamen’...
Download or read book Atlantic Shorelines written by Mark D. Bertness and published by Princeton University Press. This book was released on 2024-05-14 with total page 648 pages. Available in PDF, EPUB and Kindle. Book excerpt: A comprehensive introduction to the natural history and intertidal ecology of East Coast shorelines Atlantic Shorelines is an introduction to the natural history and ecology of shoreline communities on the East Coast of North America. Writing for a broad audience, Mark Bertness examines how distinctive communities of plants and animals are generated on rocky shores and in salt marshes, mangroves, and soft sediment beaches on Atlantic shorelines. The book provides a comprehensive background for understanding the basic principles of intertidal ecology and the unique conditions faced by intertidal organisms. It describes the history of the Atlantic Coast, tides, and near-shore oceanographic processes that influence shoreline organisms; explains primary production in shoreline systems, intertidal food webs, and the way intertidal organisms survive; sets out the unusual reproductive challenges of living in an intertidal habitat, and the role of recruitment in shaping intertidal communities; and outlines how biological processes like competition, predation, facilitation, and ecosystem engineering generate the spatial structure of intertidal communities. The last part of the book focuses on the ecology of the three main shoreline habitats—rocky shores, soft sediment beaches, and shorelines vegetated with salt marsh plants and mangroves—and discusses in detail conservation issues associated with each of them.
Download or read book Human Security written by W.E. Blatz and published by University of Toronto Press. This book was released on 1966-12-15 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt: During his lifetime, W.E. Blatz was so much occupied with the development of the University of Toronto’s Institute of Child Study that he was able to devote little time to writing. This is his first book to appear in twenty-one years, and his first complete exposition of his famous Theory of Security. The Theory of Security is radically different from the theories promulgated by Freudian psychologists. Whereas Freudian personality theory is based on the notion of “unconscious,” an entity that is only indirectly observable, the Theory of Security derives from the observation of the conscious state in all its manifestations. Dr. Blatz thus makes use of both empirical observations and the results of introspection, and, as might be expected, some of his conclusions run counter to those reached in much current psychological discussion. But proof of the forcible influence of the theory and its author may be found in the impressive number of books and articles already published by Dr. Blatz’s associates at the Institute of Child Study, applying the theory to the practical problems of psychological observation and therapy. It is fitting that the man whose work has generated so much fruitful research by others in this field should at last have set down in book form the fundamental principles that guided them.
Download or read book Urtica written by Gulsel M. Kavalali and published by CRC Press. This book was released on 2003-07-24 with total page 100 pages. Available in PDF, EPUB and Kindle. Book excerpt: Plants from the genera Urtica, often better known as the stinging nettle, can be distinguished by their stinging hairs, and in some species, their serrated leaf edges. Historical records of the various uses of Urtica date back to at least the Bronze Age (3000-2000 BC). Nettles have traditionally been used as a nutritious food source particularly in
Download or read book The Moon of Gomrath written by Alan Garner and published by . This book was released on 1967 with total page 184 pages. Available in PDF, EPUB and Kindle. Book excerpt: On the English moors, two children become involved in an age-old struggle, working with the wizard of the High Magic to destroy or at least control the more and more powerful Old Magic.
Download or read book The Flagellants written by Carlene Hatcher Polite and published by Macmillan. This book was released on 1967 with total page 226 pages. Available in PDF, EPUB and Kindle. Book excerpt: "The Flagellants is the story of the romantic relationship between Ideal and Jimson. After a brief prologue establishing Ideal's childhood connection to a black community called "the Bottom," the novel unfolds as a series of arguments between the couple, representing the historical gender conflicts between black men and women."--eNotes.
Download or read book Life and Death of the Salt Marsh written by John Teal and published by . This book was released on 1983-07 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt: "At low tide, the wind blowing across Spartina grass sounds like wind of the prairie. When the tide is in, the gentle music of moving water is added to the prairie rustle.... " One of nature's greatest gifts is the string of salt marshes that edges the East Coast from Newfoundland to Florida -- a ribbon of green growth, part solid land, part scurrying water. Life and Death of the Salt Marsh shows how these marshes are developed, what kinds of life inhabit them, how enormously they have contributed to man, and how ruthlessly man is destroying them.
Download or read book The Ecology of Atlantic Shorelines written by Mark D. Bertness and published by Sunderland, Mass. : Sinauer Associates. This book was released on 1999 with total page 417 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Ecology of Atlantic Shorelines is an introduction to the plant and animal communities on the Atlantic shores of North America. Written as a field guide to the physical and biological processes that generate patterns on Western Atlantic shorelines, it is intended for a wide audience ranging from undergraduate students and amateur naturalists to professionals in other disciplines.
