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Author: Bryan Shorrocks
Publisher:
ISBN: 9781383027365
Category : Ecology
Languages : en
Pages : 0
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Book Description
An examination of the effects of environmental heterogeneity (patchiness) in populations of plants and animals. The contributors find that patchiness can play a significant role in structuring large populations and lessening the risk of total extinction.
Author: Bryan Shorrocks
Publisher:
ISBN: 9781383027365
Category : Ecology
Languages : en
Pages : 0
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Book Description
An examination of the effects of environmental heterogeneity (patchiness) in populations of plants and animals. The contributors find that patchiness can play a significant role in structuring large populations and lessening the risk of total extinction.
Author: Bryan Shorrocks
Publisher: Oxford University Press, USA
ISBN:
Category : Business & Economics
Languages : en
Pages : 264
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Book Description
This book examines the effects of environmental heterogeneity, or patchiness, on populations of plants and animals. The factors explored include variations in space, time, climactic conditions, food and other resources, and exposure to predators and parasites. In contrast to the once-prevailing view that environmental variation can be averaged-out without losing essential dynamics, the contributors to this volume find such heterogeneities often play a significant role in structuring large populations, especially in lessening the risk of extinction. Topics include the ways animals choose between patches that will expose them to different probabilities of starvation and predation, conservation in a variable environment and the optimal size of reserves, sex determination and sex ratios, patchiness and community structure, and extinctions of populations in correlated environments. The book will be of interest to ecologists, entomologists, environmental scientists, population geneticists, and biologists specializing in evolution, population, or conservation.
Author: British Ecological Society. Symposium
Publisher: Cambridge University Press
ISBN: 9780521549356
Category : Nature
Languages : en
Pages : 454
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Book Description
A wide-ranging review of the effects of heterogeneity on individuals, populations, communities and biodiversity.
Author: Michael Hutchings
Publisher: Cambridge University Press
ISBN: 9780632057146
Category : Nature
Languages : en
Pages : 454
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Book Description
Spatial and temporal heterogeneity.
Author: Steward T.A. Pickett
Publisher: Elsevier
ISBN: 0080504957
Category : Science
Languages : en
Pages : 489
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Book Description
Ecologists are aware of the importance of natural dynamics in ecosystems. Historically, the focus has been on the development in succession of equilibrium communities, which has generated an understanding of the composition and functioning of ecosystems. Recently, many have focused on the processes of disturbances and the evolutionary significance of such events. This shifted emphasis has inspired studies in diverse systems. The phrase "patch dynamics" (Thompson, 1978) describes their common focus. The Ecology of Natural Disturbance and Patch Dynamics brings together the findings and ideas of those studying varied systems, presenting a synthesis of diverse individual contributions.
Author: Simon A. Levin
Publisher: Springer Science & Business Media
ISBN: 3642501559
Category : Science
Languages : en
Pages : 324
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Book Description
From the preface by Joel E. Cohen: "A century from now humanity will live in a managed - or mismanaged - global garden. We are debating the need to preserve tropical forests. Farming of the sea is providing an increasing part of our fish supply. We are beginning to control atmospheric emissions. In 100 years, we shall use novel farming practices and genetic engineering of bacteria to manipulate the methane production of rice fields. The continental shelf will be providing food, energy, possibly even living space. To make such intensive management possible will require massive improvements in data collection and analysis, and especially in our concepts. A century hence we will live on a wired earth: the oceans and the crust of the earth will receive the same comprehensive monitoring now devoted to weather. As the peoples of currently developing countries increase their levels of wealth, the need for global management will become irresistible as impatience with the accidents of nature and intolerance of mismanagement of the environment - especially of living resources - grow. Our control of physical perturbations and chemical inputs to the environment will be judged by the consequences to living organisms and biological communities. How can we obtain the factual and theoretical foundation needed to move from our present, fragmented knowledge and limited abilities to a managed, global garden?" This problem was addressed in the lectures and workshops of a summer school on patch dynamics at Cornell University. The school emphasized the analysis and interpretation of spatial patterns in terrestrial and marine environments. This book contains the course material of this school, combining general reviews with specific applications.
Author: T.N. Ananthakrishnan
Publisher: Scientific Publishers
ISBN: 9387869601
Category : Science
Languages : en
Pages : 142
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Book Description
One of the principal aims in writing this book pertains to the increasing impact of human influence on natural habitats in recent years, more notably to the loss of habitat quality. Increased urbanization, considerable reduction in natural forest areas, changing ecology of fresh water ecosystems, lakes and wet lands, besides changing microhabitats, have had their impact on insect populations. A wide range of responses exist among several species of insects living in these changing environments, more especially landscape dynamics creating a shifting mosaic of habitats. Sudden changes in the extent or quality of habitat tend to influence the behaviour, reproduction and survival of individuals. In very rare cases the existence of a particular species depends on the presence of some other species, not to mention of the extinction of food chains. As such, a basic understanding of the nature of habitat loss and fragmentation and their impact on insect species dynamics become important. Numerous questions are raised about patterns and timing of the evolution of insect-plant association which are essential for an understanding as to ``why the world is the world as it is today''. In this effort several specialists on diverse aspects have generously rendered assistance through providing literature and photographs and while appreciating their generosity, we would like to thank them individually for all the assistance rendered without which the production of this volume would be impossible.
Author: J Vaun McArthur
Publisher: Elsevier
ISBN: 0080511546
Category : Science
Languages : en
Pages : 429
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Book Description
Based on the thesis that insights into both evolution and ecology can be obtained through the study of microorganismsm, Microbial Ecology examines microbiology through the lens of evolutionary ecology. Measured from a microbial perspective, this text covers such topics as optimal foraging, genome, reduction, novel evolutionary mechanisms, bacterial speciation, and r and K selection. Numerous aspects of microbial existence are also discussed and include: species competition, predation, parasitism, mutualism, microbial communication through quorum sensing and other. The result is a context for understanding microbes in nature and a framework for microbiologists working in industry, medicine, and the environment. Applies evolutionary ecological concepts to microbes Addresses individual, population and community ecology Presents species concepts and offers insights on the origin of life and modern microbial ecology Examines topics such as species interactions, nutrient cycling, quorum sensing and cheating
Author: D. L. DeAngelis
Publisher: CRC Press
ISBN: 1351090364
Category : Mathematics
Languages : en
Pages : 545
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Book Description
Until fairly recently, populations were handled as homogenized averages, which made modeling feasible but which ignored the essential fact that in any population there is a great variety of individuals of different ages, sizes, and degrees of fitness. Recently, because of the increased availability of affordable computer power, approaches have been developed which are able to recognize individual differences. Individual-based models are of great use in the areas of aquatic ecology, terrestrial ecology, landscape or physiological ecology, terrestrial ecology, landscape or physiological ecology, and agriculture. This book discusses which biological problems individual-based models can solve, as well as the models' inherent limitations. It explores likely future directions of theoretical development in these models, as well as currently feasible management applications and the best mathematical approaches and computer languages to use. The book also details specific applications to theory and management.
Author: Mark Woods
Publisher: Broadview Press
ISBN: 1460405714
Category : Nature
Languages : en
Pages : 314
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Book Description
The concept and values of wilderness, along with the practice of wilderness preservation, have been under attack for the past several decades. In Rethinking Wilderness, Mark Woods responds to seven prominent anti-wilderness arguments. Woods offers a rethinking of the received concept of wilderness, developing a positive account of wilderness as a significant location for the other-than-human value-adding properties of naturalness, wildness, and freedom. Interdisciplinary in approach, the book combines environmental philosophy, environmental history, environmental social sciences, the science of ecology, and the science of conservation biology.
