Download or read book POPULATION IN A SEASONAL ENVIRONMENT 1972 written by S.D. FRETWELL and published by . This book was released on with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Populations in a Seasonal Environment written by Stephen D. Fretwell and published by Princeton University Press. This book was released on 1972-07-21 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Phenology and Seasonality Modeling written by H. Lieth and published by Springer Science & Business Media. This book was released on 2013-03-09 with total page 443 pages. Available in PDF, EPUB and Kindle. Book excerpt: The pulse of life with the seasons is a classic theme of biology, equally cap turing every man's curiosity about early and late milestones of every year's cycle and the critical physiologist's inquiry into life's subtle signals and responses. Natural historians of ancient and renaissance time as well as today have charted the commonsense facts behind inspired traditions of poetry and practical rules for growing food and fiber. This volume brings together several ways of organizing the basic principles of phenology. These find order in the otherwise overwhelming mass of detail that captures our fleeting attention, like the daily newspaper, and then tends to fade into the overstuffed archives of history. Is this order so obvious and understandable that there is no longer any scien tific challenge to "phenology" as a tradition? Or does apparent simplicity mask a complex and ultimately baffling obstacle to the understanding of seasonality in even those few indicator plants and animals we know best, not to men tion the less known species or races making up the rest of each major land scape unit or ecosystem? Denying both these hasty opinions, we think that this volume well illustrates a range of questions and answers-from soundly established (but not trivial) doctrine to exciting inquiry about how ecosystems are organized.
Download or read book Population Characteristics and Simulation Modeling of Black Ducks written by Warren Wayne Blandin and published by . This book was released on 1992 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Systems written by Alan A. Berryman and published by Springer Science & Business Media. This book was released on 2013-12-11 with total page 230 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Ecology and Management of Breeding Waterfowl written by and published by U of Minnesota Press. This book was released on 1992 with total page 812 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book National Library of Medicine Current Catalog written by National Library of Medicine (U.S.) and published by . This book was released on 1971 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt: First multi-year cumulation covers six years: 1965-70.
Download or read book Mammalogy written by Terry A. Vaughan and published by Jones & Bartlett Publishers. This book was released on 2010-02-26 with total page 769 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mammalogy is the study of mammals from the diverse biological viewpoints of structure, function, evolutionary history, behavior, ecology, classification, and economics. Newly revised and updated, the fifth edition of Mammalogy aims to explain and clarify the subject as a unified whole. In recent years we have witnessed significant changes in the taxonomy of mammals. The authors have kept pace with such changes in the field and have revised each chapter to reflect the most current data available. New pedagogical elements, including chapter outlines and further reading sections, help readers grasp key concepts and explore additional content on their own. Two new chapters on domestication and mammal diseases are available on the Mammalogy website.
Download or read book Agriculture environmental and Consumer Protection Appropriations for 1975 written by United States. Congress. House. Committee on Appropriations. Subcommittee on Agriculture--Environmental and Consumer Protection Appropriations and published by . This book was released on 1974 with total page 884 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Agriculture environmental and Consumer Protection Appropriations for Fiscal Year 1975 Hearings Before 93 2 written by United States. Congress. Senate. Appropriations Committee and published by . This book was released on 1974 with total page 1802 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Competition Theory in Ecology written by Peter A. Abrams and published by Oxford University Press. This book was released on 2022-08-25 with total page 336 pages. Available in PDF, EPUB and Kindle. Book excerpt: Competition between species arises when two or more species share at least some of the same limited resources. It is likely to affect all species, as well as many higher-level aspects of community and ecosystem dynamics. Interspecific competition shares many of the same features as density dependence (intraspecific competition) and evolution (competition between genotypes). In spite of this, a robust theoretical framework is not yet in place to develop a more coherent understanding of this important interaction. Despite its prominence in the ecological literature, the theory seems to have lost direction in recent decades, with many synthetic papers promoting outdated ideas, failing to use resource-based models, and having little utility in applied fields such as conservation and environmental management. Competition theory has done little to incorporate new findings regarding consumer-resource interactions in the context of larger food webs containing behaviourally or evolutionarily adapting components. Overly simple models and methods of analysis continue to be influential. Competition Theory in Ecology represents a timely opportunity to address these shortcomings and suggests a more useful approach to modelling that can provide a basis for future models that have greater predictive ability in both ecology and evolution. The book concludes with some broader observations on the lack of agreement on general principles to use in constructing mathematical models to help understand ecological systems. It argues that a more open discussion and debate of the underlying structure of ecological theory is now urgently required to move the field forward.
Download or read book Proposed Stabilized Season Lengths and Basic Bag Limits for Hunting Ducks Environmental Assessment EA Finding of No Significant Impact FONSI written by and published by . This book was released on 1980 with total page 46 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book The Integrated Study of Bird Populations written by H. Klomp and published by . This book was released on 1981 with total page 260 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Network Models in Population Biology written by E. R. Lewis and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 414 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book is an outgrowth of one phase of an upper-division course on quantitative ecology, given each year for the past eight at Berkeley. I am most grateful to the students in that course and to many graduate students in the Berkeley Department of Zoology and Colleges of Engineering and Natural Resources whose spirited discussions inspired much of the book's content. I also am deeply grateful to those faculty colleagues with whom, at one time or another, I have shared courses or seminars in ecology or population biology, D.M. Auslander, L. Demetrius, G. Oster, O.H. Paris, F.A. Pitelka, A.M. Schultz, Y. Takahashi, D.B. Tyler, and P. Vogelhut, all of whom contributed substantially to the development of my thinking in those fields, to my Depart mental colleagues E. Polak and A.J. Thomasian, who guided me into the litera ture on numerical methods and stochastic processes, and to the graduate students who at one time or another have worked with me on population-biology projects, L.M. Brodnax, S-P. Chan, A. Elterman, G.C. Ferrell, D. Green, C. Hayashi, K-L. Lee, W.F. Martin Jr., D. May, J. Stamnes, G.E. Swanson, and I. Weeks, who, together, undoubtedly provided me with the greatest inspiration. I am indebted to the copy-editing and production staff of Springer-Verlag, especially to Ms. M. Muzeniek, for their diligence and skill, and to Mrs. Alice Peters, biomathematics editor, for her patience.
Download or read book Australian Mammal Society written by and published by . This book was released on 1988-06 with total page 176 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Hunter Gatherer Economy in Prehistory written by Geoff Bailey and published by Cambridge University Press. This book was released on 1983-03-24 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: A series of case studies which combine an awareness of recent developments in hunter-gatherer theory with a commitment to the analysis and interpretation of prehistoric material.
Download or read book Systems Ecology written by Howard T. Odum and published by . This book was released on 1983-03-08 with total page 684 pages. Available in PDF, EPUB and Kindle. Book excerpt: An integrated theoretical and applied introduction to systems ecology that uses energy diagrammatic language to explain basic concepts of systems, modelling, and simulation. Teaches energetics while at the same time dealing with the issues of organization, entropy, information, complexity, diversity, frequency, and power and the ways these determine the nature of real systems. Includes analog and digital computer modelling, enabling readers without prior programming experience to create computer models of ecological processes.
