dispersal ecology and evolution

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Dispersal Ecology And Evolution

Author : Jean Clobert
ISBN : 9780191640360
Genre : Science
File Size : 46. 49 MB
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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.

Dispersal Ecology And Evolution

Author : Jean Clobert
ISBN : 9780199608904
Genre : Science
File Size : 84. 21 MB
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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.

Dispersal Ecology

Author : James M. Bullock
ISBN : 0521549310
Genre : Nature
File Size : 25. 2 MB
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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.

The Ecology And Evolution Of Ant Plant Interactions

Author : Victor Rico-Gray
ISBN : 9780226713472
Genre : Science
File Size : 33. 93 MB
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Ants are probably the most dominant insect group on Earth. This title brings together findings from the scientific literature on the coevolution of ants and plants to provide an understanding of the unparalleled success of these two remarkable groups, of interspecific interactions in general, and, ultimately, of terrestrial biological communities.

Seed Dispersal And Frugivory

Author : Douglas John Levey
ISBN : 9780851995250
Genre : Science
File Size : 51. 52 MB
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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.

Ecology And Evolution Of Cooperative Breeding In Birds

Author : Walter D. Koenig
ISBN : 0521530997
Genre : Nature
File Size : 30. 51 MB
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Cooperative breeders are species in which more than a pair of individuals assist in the production of young. Cooperative breeding is found in only a few hundred bird species world-wide, and understanding this often strikingly altruistic behaviour has remained an important challenge in behavioural ecology for over 30 years. This book highlights the theoretical, empirical and technical advances that have taken place in the field of cooperative breeding research since the publication of the seminal work Cooperative Breeding in Birds: Long-term Studies of Behavior and Ecology (1990, HB ISBN 0521 372984, PB ISBN 0521 378907). Organized conceptually, special attention is given to ways in which cooperative breeders have proved fertile subjects for testing modern advances to classic evolutionary problems including those of sexual selection, sex-ratio manipulation, life-history evolution, partitioning of reproduction and incest avoidance. It will be of interest to both students and researchers interested in behaviour and ecology.

The Ecology And Evolution Of Seed Dispersal Mutualisms Between Nutcrackers And Pines

Author : Adam M. Siepielski
ISBN : 9780549356899
Genre : Coevolution
File Size : 21. 67 MB
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The ecological and evolutionary factors underlying many seed dispersal mutualisms are poorly understood. I investigated spatial and temporal variation in the factors driving seed dispersal mutualisms between large-seeded (>90 mg) pines, and the bird they rely on for primary seed dispersal, the Clark's Nutcracker (Nucifraga columbiana). Preemptive competition and conflicting selection by the main pine-seed-predator, the pine squirrel (Tamiasciurus spp), limits coevolution between nutcrackers and both limber pine (Pinus flexilis) and whitebark pine (P. albicaulis), so that coevolutionary interactions between nutcrackers and pines are most pronounced in the absence of pine squirrels. A comparative study of other large-seeded pines further indicates that birds that potentially act as seed dispersers have favored the evolution of traits that enhance avian seed dispersal mainly where tree squirrels (Tamiasciurus and Sciurus) are uncommon or absent. This explains why most large-seeded bird-dispersed pines are found only in regions without tree squirrels. In regions with squirrels, enhanced seed defenses against squirrels reduce the effectiveness of birds as seed dispersers but favor seed dispersal by scatter-hoarding rodents. This indicates that seed predators can drive the evolution of seed defenses that in turn favor alternative seed dispersal mutualisms. The competitive and evolutionary effects of tree squirrels also result in fewer seeds available for seed dispersal. Consequently, recruitment appears to be depressed where pine squirrels are present; stand densities of both limber and whitebark pines in areas with pine squirrels are only about half of those in areas without pine squirrels. Lastly, infrequent large seed crops of whitebark pine (masting) are essential for the evolution of the seed dispersal mutualism because large seed crops cause nutcrackers to shift from being a seed predator to a seed disperser, and cause selection exerted by nutcrackers to be focused on cone and seed traits when the interaction is most strongly mutualistic. Overall, results from these studies suggest that spatial variation in community structure and temporal variation in resource abundance are key factors underlying the ecology and evolution of seed dispersal mutualisms between nutcrackers and pines.

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