Biological Adaptations of Anuran Species across Diverse Habitats, Spanning Mediterranean to Desert Climates PDF Download
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Author: Gad Degani
Publisher: Scientific Research Publishing, Inc. USA
ISBN: 1649978006
Category : Antiques & Collectibles
Languages : en
Pages : 94
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Book Description
The class Amphibia contains over 6,300 known species, 54% of which live in the neotropical region. They cannot tolerate the high salt content of sea water and are therefore the only vertebrates not to have colonized marine habitats (Capula, 1989). The class is divided into three orders. The largest, Anura, is divided into approximately 30 families and more than 4,500 spe-cies, ranging in size from a few millimeters to a couple of feet in length, and found in nearly every niche on earth. They have four limbs, the hind limbs typically being larger and modified for leaping or climbing. Most are external fertilizers. These species are also vocal, making sounds that range from squeaks to barks. In lentic environments, anuran breeding occurs in water bodies ranging from ephemeral pools to large permanent lakes (Richter-Boix et al., 2006). Most species deposit their eggs or live larvae in aquatic envi-ronments; these go through a larval phase (tadpoles) characterized by in-tensive morphological transformation—metamorphosis—to the juvenile stage, with an adult appearance; they then continue growing until the re-productive stage.
Author: Gad Degani
Publisher: Scientific Research Publishing, Inc. USA
ISBN: 1649978006
Category : Antiques & Collectibles
Languages : en
Pages : 94
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Book Description
The class Amphibia contains over 6,300 known species, 54% of which live in the neotropical region. They cannot tolerate the high salt content of sea water and are therefore the only vertebrates not to have colonized marine habitats (Capula, 1989). The class is divided into three orders. The largest, Anura, is divided into approximately 30 families and more than 4,500 spe-cies, ranging in size from a few millimeters to a couple of feet in length, and found in nearly every niche on earth. They have four limbs, the hind limbs typically being larger and modified for leaping or climbing. Most are external fertilizers. These species are also vocal, making sounds that range from squeaks to barks. In lentic environments, anuran breeding occurs in water bodies ranging from ephemeral pools to large permanent lakes (Richter-Boix et al., 2006). Most species deposit their eggs or live larvae in aquatic envi-ronments; these go through a larval phase (tadpoles) characterized by in-tensive morphological transformation—metamorphosis—to the juvenile stage, with an adult appearance; they then continue growing until the re-productive stage.
Author: Harold Mooney
Publisher: Univ of California Press
ISBN: 0520278801
Category : Nature
Languages : en
Pages : 1008
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Book Description
This long-anticipated reference and sourcebook for CaliforniaÕs remarkable ecological abundance provides an integrated assessment of each major ecosystem typeÑits distribution, structure, function, and management. A comprehensive synthesis of our knowledge about this biologically diverse state, Ecosystems of California covers the state from oceans to mountaintops using multiple lenses: past and present, flora and fauna, aquatic and terrestrial, natural and managed. Each chapter evaluates natural processes for a specific ecosystem, describes drivers of change, and discusses how that ecosystem may be altered in the future. This book also explores the drivers of CaliforniaÕs ecological patterns and the history of the stateÕs various ecosystems, outlining how the challenges of climate change and invasive species and opportunities for regulation and stewardship could potentially affect the stateÕs ecosystems. The text explicitly incorporates both human impacts and conservation and restoration efforts and shows how ecosystems support human well-being. Edited by two esteemed ecosystem ecologists and with overviews by leading experts on each ecosystem, this definitive work will be indispensable for natural resource management and conservation professionals as well as for undergraduate or graduate students of CaliforniaÕs environment and curious naturalists.
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Category :
Languages : en
Pages : 64
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Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
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Category : Hydrology
Languages : en
Pages : 1524
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Author: Osvaldo E. Sala
Publisher: Springer Science & Business Media
ISBN: 9780387952499
Category : Nature
Languages : en
Pages : 414
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Book Description
Climatic change, conservation biology
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Publisher:
ISBN:
Category :
Languages : en
Pages : 64
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Book Description
The Bulletin of the Atomic Scientists is the premier public resource on scientific and technological developments that impact global security. Founded by Manhattan Project Scientists, the Bulletin's iconic "Doomsday Clock" stimulates solutions for a safer world.
Author: Michael Lannoo
Publisher: Univ of California Press
ISBN: 0520929438
Category : Science
Languages : en
Pages : 1117
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Book Description
This benchmark volume documents in comprehensive detail a major environmental crisis: rapidly declining amphibian populations and the disturbing developmental problems that are increasingly prevalent within many amphibian species. Horror stories on this topic have been featured in the scientific and popular press over the past fifteen years, invariably asking what amphibian declines are telling us about the state of the environment. Are declines harbingers of devastated ecosystems or simply weird reflections of a peculiar amphibian world? This compendium—presenting new data, reviews of current literature, and comprehensive species accounts—reinforces what scientists have begun to suspect, that amphibians are a lens through which the state of the environment can be viewed more clearly. And, that the view is alarming and presages serious concerns for all life, including that of our own species. The first part of this work consists of more than fifty essays covering topics from the causes of declines to conservation, surveys and monitoring, and education. The second part consists of species accounts describing the life history and natural history of every known amphibian species in the United States.
Author: Rüdiger Riesch
Publisher: Springer
ISBN: 3319133624
Category : Science
Languages : en
Pages : 329
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Book Description
This book summarizes the key adaptations enabling extremophile fishes to survive under harsh environmental conditions. It reviews the most recent research on acidic, Antarctic, cave, desert, hypersaline, hypoxic, temporary, and fast-flowing habitats, as well as naturally and anthropogenically toxic waters, while pointing out generalities that are evident across different study systems. Knowledge of the different adaptations that allow fish to cope with stressful environmental conditions furthers our understanding of basic physiological, ecological, and evolutionary principles. In several cases, evidence is provided for how the adaptation to extreme environments promotes the emergence of new species. Furthermore, a link is made to conservation biology, and how human activities have exacerbated existing extreme environments and created new ones. The book concludes with a discussion of major open questions in our understanding of the ecology and evolution of life in extreme environments.
Author: National Research Council
Publisher: National Academies Press
ISBN: 0309082951
Category : Science
Languages : en
Pages : 449
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Book Description
The Clean Water Act (CWA) requires that wetlands be protected from degradation because of their important ecological functions including maintenance of high water quality and provision of fish and wildlife habitat. However, this protection generally does not encompass riparian areasâ€"the lands bordering rivers and lakesâ€"even though they often provide the same functions as wetlands. Growing recognition of the similarities in wetland and riparian area functioning and the differences in their legal protection led the NRC in 1999 to undertake a study of riparian areas, which has culminated in Riparian Areas: Functioning and Strategies for Management. The report is intended to heighten awareness of riparian areas commensurate with their ecological and societal values. The primary conclusion is that, because riparian areas perform a disproportionate number of biological and physical functions on a unit area basis, restoration of riparian functions along America's waterbodies should be a national goal.
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Category : Biodiversity
Languages : en
Pages : 168
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