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Author: N.C. Stenseth
Publisher: Springer Science & Business Media
ISBN: 9401123381
Category : Science
Languages : en
Pages : 359
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Book Description
4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.
Author: N.C. Stenseth
Publisher: Springer Science & Business Media
ISBN: 9401123381
Category : Science
Languages : en
Pages : 359
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Book Description
4.1.1 Demographic significance Confined populations grow more rapidly than populations from which dispersal is permitted (Lidicker, 1975; Krebs, 1979; Tamarin et at., 1984), and demography in island populations where dispersal is restricted differs greatly from nearby mainland populations (Lidicker, 1973; Tamarin, 1977, 1978; Gliwicz, 1980), clearly demonstrating the demographic signi ficance of dispersal. The prevalence of dispersal in rapidly expanding populations is held to be the best evidence for presaturation dispersal. Because dispersal reduces the growth rate of source populations, it is generally believed that emigration is not balanced by immigration, and that mortality of emigrants occurs as a result of movement into a 'sink' of unfavourable habitat. If such dispersal is age- or sex-biased, the demo graphy of the population is markedly affected, as a consequence of differ ences in mortality in the dispersive sex or age class. Habitat heterogeneity consequently underlies this interpretation of dispersal and its demographic consequences, although the spatial variability of environments is rarely assessed in dispersal studies.
Author: Casper H. A. Van Leeuwen
Publisher: Frontiers Media SA
ISBN: 2889634779
Category :
Languages : en
Pages : 196
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Book Description
This eBook is a collection of articles from a Frontiers Research Topic. Frontiers Research Topics are very popular trademarks of the Frontiers Journals Series: they are collections of at least ten articles, all centered on a particular subject. With their unique mix of varied contributions from Original Research to Review Articles, Frontiers Research Topics unify the most influential researchers, the latest key findings and historical advances in a hot research area! Find out more on how to host your own Frontiers Research Topic or contribute to one as an author by contacting the Frontiers Editorial Office: frontiersin.org/about/contact.
Author: Michael A. Steele
Publisher: Johns Hopkins University Press
ISBN: 1421439018
Category : Science
Languages : en
Pages : 480
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Book Description
Theimer, an accomplished ecologist.
Author: Anna Traveset
Publisher: Frontiers Media SA
ISBN: 2889765067
Category : Science
Languages : en
Pages : 150
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Book Description
Author: Andrew J. Dennis
Publisher: CABI
ISBN: 1845931661
Category : Technology & Engineering
Languages : en
Pages : 704
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Book Description
Fresh concepts in the study of seed dispersal are spurring a host of exciting new questions, new answers to old questions, new methods and approaches, and a reinvigoration of the field.Seed Dispersal: Theory and its Application in a Changing World presents both recent advances and reviews of current knowledge demonstrating the vigour and vibrancy of the field. It provides new perspectives and directions at a time when efforts to meet growing environmental challenges threatening natural systems are of utmost importance.
Author: Jean Clobert
Publisher: OUP Oxford
ISBN: 0191640360
Category : Science
Languages : en
Pages : 496
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Book Description
Now that so many ecosystems face rapid and major environmental change, the ability of species to respond to these changes by dispersing or moving between different patches of habitat can be crucial to ensuring their survival. Understanding dispersal has become key to understanding how populations may persist. Dispersal Ecology and Evolution provides a timely and wide-ranging overview of the fast expanding field of dispersal ecology, incorporating the very latest research. The causes, mechanisms, and consequences of dispersal at the individual, population, species, and community levels are considered. Perspectives and insights are offered from the fields of evolution, behavioural ecology, conservation biology, and genetics. Throughout the book theoretical approaches are combined with empirical data, and care has been taken to include examples from as wide a range of species as possible - both plant and animal.
Author: Vero Copner Wynne-Edwards
Publisher: Edinburgh : Oliver and Boyd
ISBN:
Category : Animal behavior
Languages : en
Pages : 698
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Book Description
An outline of the principles of animal dispersion. The integration of social groups by visible signals. Dispersion in the breeding season: birds. Display characters and natural selection. Fourther consideration of castes in animal societies. Timing and synchronisation. Vertical migration of the plankton. Fluctuations, irruptions and emigrations. Recruitment through reproduction. Socially-induced mortality. Deferment of growth and maturity.
Author: Carlos M. Herrera
Publisher: John Wiley & Sons
ISBN: 1444312294
Category : Science
Languages : en
Pages : 328
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Book Description
Interactions between plants and animals are incredibly diverse and complex and span terrestrial, atmospheric and aquatic environments. The last decade has seen the emergence of a vast quantity of data on the subject and there is now a perceived need among both teachers and undergraduate students for a new textbook that incorporates the numerous recent advances made in the field. The book is intended for use by advanced level undergraduate and beginning graduate students, taking related courses in wider ecology degree programmes. Very few books cover this subject and those that do are out of date.
Author: Nicole Boivin
Publisher: Cambridge University Press
ISBN: 1107164141
Category : Social Science
Languages : en
Pages : 573
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Book Description
A unique, interdisciplinary and up-to-date treatment exploring human migration and its role in creating novel ecosystems over the long term.
Author: Charles Sutherland Elton
Publisher:
ISBN:
Category : Animal ecology
Languages : en
Pages : 280
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Book Description
