Download or read book Dispersal Ecology and Evolution written by Jean Clobert and published by OUP Oxford. This book was released on 2012-09-27 with total page 496 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Oak Seed Dispersal written by Michael A. Steele and published by Johns Hopkins University Press. This book was released on 2021-01-05 with total page 480 pages. Available in PDF, EPUB and Kindle. Book excerpt: Theimer, an accomplished ecologist.
Download or read book Principles of Dispersal in Higher Plants written by L. van der Pijl and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 171 pages. Available in PDF, EPUB and Kindle. Book excerpt: Reviewers from diverse branches of botany have exerted pressure to have chapters dealing with their field extended. If only to cover his incompetence, the author could not accede to these requests. Nor was it possible to respond to Eastern European urgings to extend the classificatory terminology, especially in ChapterX. He is grateful for indications of factual shortcomings in the chosen field, especially for those by Dr. RUDOLF SCHMID (Ann Arbor), who provided exten sive comment. L. VAN DER PIlL The Hague, spring 1972 Preface to the First Edition The work offered here is a companion volume to the work by K. FAEGRI and 1. VAN DER PIJL, Principles of Pollination Ecology, whim. deals with the preced ing phase of reproduction in plants. In the present work too, the emphasis is on principles and ecology. It is neither an enumeration of mechanisms, nor a compilation of cases. RIDLEY'S monumental work The Dispersal of Plants Throughout the World comprises 700 large pages of small print, and research has proceeded since then. Though this work is more than just a compilation and contains much insight and thoughts on principles in addition to reviews, its completeness hinders its use as a text book. As a reference work, it is unsurpassed and the writer made frequent use of it. The writer paid special attention to functional backgrounds for the use of taxonomists working with "characters" and to biosystematics at the macro-level.
Download or read book Animal Dispersal written by N.C. Stenseth and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 359 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Mammalian Dispersal Patterns written by B. Diane Chepko-Sade and published by University of Chicago Press. This book was released on 1987 with total page 361 pages. Available in PDF, EPUB and Kindle. Book excerpt: Mammalian Dispersal Patterns examines the ways that social structure affects population genetics and, in turn, rates of evolution, in mammalian groups. It brings together fieldwork in animal behavior and wildlife biology with theoretical work in demography and population genetics. The focus here is dispersal—whether, how, and when individuals leave the areas where they are born. Theoretical work in population genetics indicates that such social factors as skewed sex ratios, restrictive mating patterns, and delayed age of first reproduction will lower the reproductive variability of a population by reducing the number of genotypes passed from one generation to the next. Field studies have shown that many mammalian species do exhibit many such social characteristics. Among horses, elephant seals, and a number of primates, the majority of females are inseminated by only a fraction of the males. In pacts of wolves and mongooses, usually only the highest-ranking male and female breed in a given season. Although socially restricted mating tends to lower genetic variability in isolated populations, it actually tends to increase genetic variability in subdivided populations with low rates of migration between subunits. Among some species there is little dispersal and thus little gene flow between subpopulations; other species travel far afield before mating. The contributors to this volume examine actual data from populations of mammals, the way patterns of dispersal correlate with the genetic structure of individuals and populations, and mathematical models of population structure. This interdisciplinary approach has an important bearing on work in conservation of both wildlife and zoo populations, for it shows that the home range and the population size needed to maintain genetic variability can differ greatly from one species to the next. The volume also offers a fruitful model for future research.
Download or read book Seed Dispersal by Bats in the Neotropics written by Tatyana A. Lobova and published by New York Botanical Garden Press. This book was released on 2009 with total page 538 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides a comprehensive treatment of all known bat-dispersed plants in the New World tropics and covers a total of 549 species in 191 genera from 62 plant families. It places a special emphasis on the flowering plants and bat fauna of the relatively undisturbed forests of central French Guiana. In particular, detailed descriptions of 112 bat-dispersed species from that area are complemented by color photographs that will help other researchers identify fruits and seeds throughout the Neotropics. Going beyond merely describing these species, the authors compare and analyze the diverse traits of plants dispersed by bats to reexamine bat preferences of some fruiting plants over the others, a phenomenon known as the "bat-fruit syndrome." The seed dispersers too are given ample treatment, with descriptions of the foraging ecology and feeding behaviors of the 37 fruit-eating bats found in central French Guiana. The monograph includes complementing appendices that allow the reader to determine all bat species reported to feed on the fruits of a particular plant and all fruiting plants in the diet of a particular bat species. It summarizes decades of research on bat-plant interactions from many parts of the Neotropics, providing a stimulus for further ecological and evolutionary studies--
Download or read book Seed Dispersal by Ants in a Deciduous Forest Ecosystem written by Elena Gorb and published by Springer Science & Business Media. This book was released on 2013-06-29 with total page 246 pages. Available in PDF, EPUB and Kindle. Book excerpt: Countless ants transport and deposit seeds and thereby influence the survival, death, and evolution of many plant species. In higher plants, seed dispersal by ants (myrmecochory) has appeared many times independently in different lineages. More than 3000 plant species are known to utilize ant assistance to be planted. Myrmecochory is a very interesting and rather enigmatic form of mutualistic ant-plant associations. This phenomenon is extremely complex, because there are hundreds of ant species connected with hundreds of plant species. This book effectively combines a thorough approach to investigating morphological and physiological adaptations of plants with elegant field experiments on the behaviour of ants. This monograph is a first attempt at collecting information about morphology, ecology and phenology of ants and plants from one ecosystem. The book gives readers a panoramic view of the hidden, poorly-known interrelations not only between pairs of ants and plant species, but also between species communities in the ecosystem. The authors have considered not just one aspect of animal-plant relationships, but have tried to show them in all their complexity. Some aspects of the ant-plant interactions described in the book may be of interest to botanists, others to zoologists or ecologists, but the entire work is an excellent example of the marriage of these biological disciplines.
Download or read book Aerial Dispersal of Pollen and Spores written by Donald E. Aylor and published by . This book was released on 2017 with total page 418 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Seed Dispersal written by David R. Murray and published by Academic Press. This book was released on 2012-12-02 with total page 337 pages. Available in PDF, EPUB and Kindle. Book excerpt: Seed Dispersal focuses on the mechanics and processes involved in seed dispersal, including its implications in ecology, animal behavior, plant and animal biogeography, speciation, and evolution. The selection first elaborates on the aerial motion of seeds, fruits, spores, and pollen and seed dispersal by water. Discussions focus on seed dispersal by rain, river, and flood, effective seed dispersal by ocean currents compared to other vectors, aerodynamic forces and their effects, and launching and release mechanisms. The text then takes a look at seed dispersal syndromes in Australian Acacia, including inference of dispersal syndromes, seed dispersal syndromes, ecological consequences of seed dispersal, and evolutionary derivation of dispersal syndromes. The publication ponders on seed dispersal by fruit-eating birds and mammals, rodents as seed consumers and dispersers, and seed dispersal in relation to fire. Topics include fire as a dispersal vector, long distance dispersal, granivorous rodents and the fates of seeds, determinants of the fate path, population ecology of seed dispersal, and foraging for fruits. The selection is a valuable reference for researchers interested in the factors involved in seed dispersal.
Download or read book Seed Dispersal written by Andrew J. Dennis and published by CABI. This book was released on 2007 with total page 704 pages. Available in PDF, EPUB and Kindle. Book excerpt: 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.
Download or read book Seed Fate written by J. E. Lambert and published by CABI. This book was released on 2005 with total page 432 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book presents current knowledge of seed fate in both natural and human-disturbed landscapes, from various regions of the world. Habitats considered range from mountain and arid deserts in the temperate zone, to savanna and lowland rainforests in tropical regions of the world. Particular attention is paid to plant diversity conservation when seed removal is affected by factors such as hunting, habitat fragmentation or intensive logging. Contributors include leading scientists involved in research on seed ecology and on animal-plant relationships from the perspective of both primary and secondary seed dispersal, and predation.
Download or read book Dispersal Biology of Desert Plants written by Karen van Rheede van Oudtshoorn and published by Springer Science & Business Media. This book was released on 1998-12-04 with total page 266 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersal processes have important effects on plant distribution and abundance. Although adaptations to long range dispersal (telechory) are by no means rare in desert plants, many desert plant species do not possess any features to promote dispersal (atelechory), while others have structures that hamper dispersal (antitelechory). The high frequency with which atelechorous and antitelechorous mechanisms are present in plants inhabiting arid areas indicates the importance of these adaptations. Among the benefits derived from these adaptations are the spreading of germination over time, the provision of suitable conditions for germination and subsequent seedling establishment, and the maintenance of a reservoir of available seeds (seed bank). This book describes the ways and means - anatomical, morphological and ecological - by which dispersal in desert plants has evolved to ensure the survival of these species in their harsh and unpredictable environment.
Download or read book Human Dispersal and Species Movement written by Nicole Boivin and published by Cambridge University Press. This book was released on 2017-05-27 with total page 573 pages. Available in PDF, EPUB and Kindle. Book excerpt: A unique, interdisciplinary and up-to-date treatment exploring human migration and its role in creating novel ecosystems over the long term.
Download or read book Seed Dispersal and Frugivory written by Douglas John Levey and published by CABI. This book was released on 2002 with total page 530 pages. Available in PDF, EPUB and Kindle. Book excerpt: This book provides information on the historical and theoretical perspectives of biodiversity and ecology in tropical forests, plant and animal behaviour towards seed dispersal and plant-animal interactions within forest communities, consequences of seed dispersal, and conservation, biodiversity and management.
Download or read book Cities of Dispersal written by Rafi Segal and published by Academy Press. This book was released on 2008-02-11 with total page 148 pages. Available in PDF, EPUB and Kindle. Book excerpt: Questioning the traditional boundaries between cities, suburbs, countryside and wilderness, this issue of AD explores emergent types of public space in low-density environments. It describes this new form of urbanism: decentralised, in a constant process of expansion and contraction, not homogenous or necessarily low-rise, nor guided by one mode of development, typology or pattern. While functionally and programmatically dispersed, settlements operate as a form of urbanism; the place of collective spaces within them has yet to be defined and articulated. The physical transformation of the built environment on the one hand, and the change in our notion of the public on the other - due to globalisation, privatisation and segregation - call for renewed interpretations of the nature and character of public space. The concept of public space needs to be examined: replaced, re-created or adapted to fit these conditions. What is the place of the public in this form of urbanism, and how can architecture address the notion of common, collective spaces? What is the current sociopolitical role o such spaces? How does the form and use of these spaces reflect the conception of the public as a political (or non-political) body? And can architecture regain an active role in formulating the notion of the collective? These and other issues are addressed through essays, research projects and built work by distinguished writers such as Bruce Robbins, Albert Pope and Alex Wall, and Practitioners including Zvi Hecker, Vito Acconci, MUTOPIA, Manuel de Sola-Morales, Martha Rosler and Manuel Vicente in a search for new collective architectures within the dispersed city.
Download or read book Dispersal Ecology written by British Ecological Society. Symposium and published by Cambridge University Press. This book was released on 2002-08 with total page 478 pages. Available in PDF, EPUB and Kindle. Book excerpt: Dispersal has become central to many questions in theoretical and applied ecology in recent years. In this volume a team of leading ecologists aim to provide the advanced student and researcher with a comprehensive review of dispersal and its implications for modern ecology.
Download or read book Dispersal Ecology and Evolution written by Jean Clobert and published by Oxford University Press. This book was released on 2012-09-27 with total page 498 pages. Available in PDF, EPUB and Kindle. Book excerpt: Provides an overview of the fast expanding field of dispersal ecology. The causes, mechanisms, and consequences of dispersal at the individual, population, species, and community levels are all considered.
