Download or read book Dispersal in the Natterjack Toad a Species with a Fragmented Distribution written by Virginie Stevens and published by . This book was released on 2006 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Population Dynamics of the Natterjack Toad Bufo Calamita in a Fragmented Pond Complex South West Ireland written by Aurélie Emily Aubry and published by . This book was released on 2009 with total page 190 pages. Available in PDF, EPUB and Kindle. Book excerpt: The thesis documented and explored empirical data on populations of natterjack toads (Bufo calamita Laurenti), a pond-breeding amphibian particularly vulnerable to climate change, habitat degradation and fragmentation. The research used data collected in the field (census and environmental data, mark-recapture study) to assess the spatiotemporal dynamics of toad populations at local (2-5km) and regional (>10km) scales, to identify the local environmental determinants of toad breeding activity and success and to assess the movement patterns of juvenile and adult toads within and between breeding sites. There was no synchrony in the toad breeding activity and success at the local level, suggesting that populations function as individual clusters independent of each other, with little or irregular dispersal among populations. Regional synchrony in both rainfall and temperature probably explain the observed regional synchrony in the number of egg strings (used as a surrogate for adult breeding female population size). Using a model selection approach, results indicated that the abundance and diversity of predators of tadpoles were the most influential factors on toad reproductive success. A 46-day mesocosm experiment indicated that the presence of B. calamita tadpoles and their predators (here the dragonfly Sympetrum striolatum larvae) could enhance the functioning of pond ecosystems through both direct and indirect effects, in particular through increases in decomposition rates and enhanced secondary production. Several aspects of the research suggested that some of the toad populations were structured as source-sink populations, where the viability of local populations in sink habitats relies on immigration from source areas. The maintenance of a network of ponds within the dispersal range of species is therefore essential to ensure the long-term viability of amphibian populations, especially for those species (e.g. B. calamita) breeding in temporary ponds.
Download or read book Dispersal Ecology and Evolution written by Michel Baguette and published by Oxford University Press. This book was released on 2012-09-27 with total page 497 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.
Download or read book The Natterjack Toad written by Trevor John Clark Beebee and published by . This book was released on 1983 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Fundamentals of Biogeography written by Richard J. Huggett and published by Psychology Press. This book was released on 2004 with total page 456 pages. Available in PDF, EPUB and Kindle. Book excerpt: "Fundamentals of Biogeography presents an appealing introduction for students and all those interested in gaining a deeper understanding of key topics and debates within the fields of biogeography, ecology, and the environment. Revealing how life has been and is adapting to its biological and physical surroundings, Huggett stresses the role of ecological, historical, and human factors in fashioning animal and plant distributions, and explores how biogeography can inform conservation practice."--Jacket.
Download or read book Canadian Journal of Zoology written by and published by . This book was released on 2014-05 with total page 420 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Contributions of Behavior and Physiology to Conservation Biology written by Susan C. Walls and published by Frontiers Media SA. This book was released on 2020-03-30 with total page 141 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Behavioural Responses to a Changing World written by Ulrika Candolin and published by OUP Oxford. This book was released on 2012-06-14 with total page 280 pages. Available in PDF, EPUB and Kindle. Book excerpt: Human-induced environmental change currently represents the single greatest threat to global biodiversity. Species are typically adapted to the local environmental conditions in which they have evolved. Changes in environmental conditions initially influence behaviour, which in turn affects species interactions, population dynamics, evolutionary processes and, ultimately, biodiversity. How animals respond to changed conditions, and how this influences population viability, is an area of growing research interest. Yet, despite the vital links between environmental change, behaviour, and population dynamics, surprisingly little has been done to bridge these areas of research. Behavioural Responses to a Changing World is the first book of its kind devoted to understanding behavioural responses to environmental change. The volume is comprehensive in scope, discussing impacts on both the mechanisms underlying behavioural processes, as well as the longer-term ecological and evolutionary consequences. Drawing on international experts from across the globe, the book covers topics as diverse as endocrine disruption, learning, reproduction, migration, species interactions, and evolutionary rescue.
Download or read book Natterjack Toad written by English Nature (Agency) and published by . This book was released on 1992-01-01 with total page 2 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Natterjack Toad written by J. S. Denton and published by . This book was released on 1995 with total page 49 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Experimental Studies of the Spatial Dynamics of T ngara Frog Populations written by David M. Marsh and published by . This book was released on 2000 with total page 214 pages. Available in PDF, EPUB and Kindle. Book excerpt:
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 Amphibian Biology Volume 11 Part 3 written by Harold Heatwole and published by Pelagic Publishing. This book was released on 2013-07-01 with total page 111 pages. Available in PDF, EPUB and Kindle. Book excerpt: Amphibian species around the world are unusually vulnerable to a variety of threats, by no means all of which are properly understood. Volume 11 in this major series will be published in parts devoted to the causes of amphibian decline and to conservation measures in regions of the world; this Part 3 is concerned with Western Europe (Britain, Ireland, The Netherlands, Belgium, France, Spain and Portugal). Experts from each country contribute a chapter describing the ecological background and the conservation status of affected species, with an emphasis on native species. As well as infectious diseases and parasites (also covered in a general chapter), threats take the form of introduced and invasive species, pollution, destruction and alteration of habitat, and climate change. These are discussed as they affect each species. All these countries have monitoring schemes and conservation programmes, whose origins and activities are described. Recommendations for action are also made. Edited by leading scholars in the field, Volume 11, when complete, will therefore provide a definitive survey of the amphibian predicament and a stimulus to further research with the objective of arresting the global decline of an entire class of animal.
Download or read book European Animals written by Robert Francis Scharff and published by . This book was released on 1907 with total page 286 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Ireland written by Michael Viney and published by Smithsonian Institution. This book was released on 2014-10-28 with total page 421 pages. Available in PDF, EPUB and Kindle. Book excerpt: Ireland conjures up images of nature's majesty: sweeping coastlines, rolling green hills, and secluded peat bogs and marshlands. A place of legendary beauty, it is also a land with a rich natural history. Michael Viney invites us to discover the geologic forces that created the island, peer into the famous bone caves that hold unique clues about animals from long ago, and experience the dramatic scenes of the cliff-lined coast and tempestuous seas. Viney begins deep in the past, when rivers of molten rock and enormous glaciers stripped the land bare. Soon after the glaciers retreated, the island was transformed into a fresh, new landscape, home to an intriguing variety of plants and animals, and an environment that has cultivated a rich human history and inspired countless myths. Infused with the lyricism of Irish prose, Ireland: A Smithsonian Natural History is indispensable for anyone seeking to understand the natural beauty of the Emerald Isle.
Download or read book Fundamentals of Biogeography written by and published by Routledge. This book was released on with total page 290 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Mosaic Landscapes and Ecological Processes written by L. Hansson and published by Springer Science & Business Media. This book was released on 2012-12-06 with total page 364 pages. Available in PDF, EPUB and Kindle. Book excerpt: This series presents studies that have used the paradigm of landscape ecology. Other approaches, both to landscape and landscape ecology are common, but in the last decade landscape ecology has become distinct from its predecessors and its contemporaries. Landscape ecology addresses the relationships among spatial patterns, temporal patterns and ecological processes. The effect of spatial configurations on ecological processes is fundamental. When human activity is an important variable affecting those relationships, landscape ecology includes it. Spatial and temporal scales are as large as needed for comprehension of system processes and the mosaic included may be very heterogeneous. Intellec tual utility and applicability of results are valued equally. The Inter national Association for Landscape Ecology sponsors this series of studies in order to introduce and disseminate some of the new knowledge that is being produced by this exciting new environmental science. Gray Merriam Ottawa, Canada Foreword This is a book about real nature, or as close to real as we know - a nature of heterogeneous landscapes, wild and humanized, fine-grained and coarse-grained, wet and dry, hilly and flat, temperate and not so temper ate. Real nature is never uniform. At whatever spatial scale we examine nature, we encounter patchiness. If we were to look down from high above at a landscape of millions of hectares, using a zoom lens to move in and out from broad overview to detailed inspection of a square meter we would see that patterns visible at different scales overlay one another.
