Dissertation Abstracts International PDF Download

Author:
Publisher:
ISBN:
Category : Dissertations, Academic
Languages : en
Pages : 800

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Author:
Publisher: Academic Press
ISBN: 0123847206
Category : Nature
Languages : en
Pages : 5485

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Book Description
The 7-volume Encyclopedia of Biodiversity, Second Edition maintains the reputation of the highly regarded original, presenting the most current information available in this globally crucial area of research and study. It brings together the dimensions of biodiversity and examines both the services it provides and the measures to protect it. Major themes of the work include the evolution of biodiversity, systems for classifying and defining biodiversity, ecological patterns and theories of biodiversity, and an assessment of contemporary patterns and trends in biodiversity. The science of biodiversity has become the science of our future. It is an interdisciplinary field spanning areas of both physical and life sciences. Our awareness of the loss of biodiversity has brought a long overdue appreciation of the magnitude of this loss and a determination to develop the tools to protect our future. Second edition includes over 100 new articles and 226 updated articles covering this multidisciplinary field— from evolution to habits to economics, in 7 volumes The editors of this edition are all well respected, instantly recognizable academics operating at the top of their respective fields in biodiversity research; readers can be assured that they are reading material that has been meticulously checked and reviewed by experts Approximately 1,800 figures and 350 tables complement the text, and more than 3,000 glossary entries explain key terms

Author: Yanfu Bai
Publisher: Frontiers Media SA
ISBN: 2832553109
Category : Science
Languages : en
Pages : 186

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Book Description
Known as the “roof of the world,” the Tibetan Plateau is the highest and largest plateau on Earth. Tibetan Plateau hosts several mountain ecosystems characterized by high elevations, cold conditions, and a wide range in water availability. Its unique physical and geographical environment includes ecosystems typical for alpine regions, classified as alpine grasslands, which account for 50-70% of the total land area of the Tibetan plateau. Most of these grasslands contain fragile tundra-like environments which are seriously affected by anthropogenic modifications and whose restoration presents a challenge. These natural grassland types include alpine deserts, alpine steppes, alpine meadows, and alpine swamp meadows along precipitation gradients, as well as the transition types between them. Alpine grasslands remain subject to severe degradation by multiple factors, mainly overgrazing and climate warming. As a result, grasslands exhibit a decreased capacity to support biodiversity and complexity, and more generally, ecosystem functions. Therefore, these changes also affect social and recreational activities and restrict access to clean water and food by local communities.

Author: Patrick Douaud
Publisher: University of Regina Press
ISBN: 9780889771468
Category : Nature
Languages : en
Pages : 218

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Book Description
Landscapes of the Northern Great Plains have been constantly changing, but never so rapidly as under modern conditions of economic affluence and technological development. This change is multifaceted and has an impact not only on the fabric of culture and its perception of landscape, but also on the ecology and physical landforms. Multidisciplinary research has therefore become an important tool in identifying the influences that human activities have, not only on cultural landscapes but on biophysical ones as well. This collection of articles, originating in a conference held at the Royal Saskatchewan Museum in April 2000, focuses on just such an integration of research concerning the Great Plains of North America and involving the disciplines of geology, archaeology, biology, geography, sociology, and agriculture.

Author: Aldo Leopold
Publisher: Island Press
ISBN: 1597267988
Category : Nature
Languages : en
Pages : 263

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Book Description
Aldo Leopold's classic work A Sand County Almanac is widely regarded as one of the most influential conservation books of all time. In it, Leopold sets forth an eloquent plea for the development of a "land ethic" -- a belief that humans have a duty to interact with the soils, waters, plants, and animals that collectively comprise "the land" in ways that ensure their well-being and survival. For the Health of the Land, a new collection of rare and previously unpublished essays by Leopold, builds on that vision of ethical land use and develops the concept of "land health" and the practical measures landowners can take to sustain it. The writings are vintage Leopold -- clear, sensible, and provocative, sometimes humorous, often lyrical, and always inspiring. Joining them together are a wisdom and a passion that transcend the time and place of the author's life. The book offers a series of forty short pieces, arranged in seasonal "almanac" form, along with longer essays, arranged chronologically, which show the development of Leopold's approach to managing private lands for conservation ends. The final essay is a never before published work, left in pencil draft at his death, which proposes the concept of land health as an organizing principle for conservation. Also featured is an introduction by noted Leopold scholars J. Baird Callicott and Eric T. Freyfogle that provides a brief biography of Leopold and places the essays in the context of his life and work, and an afterword by conservation biologist Stanley A. Temple that comments on Leopold's ideas from the perspective of modern wildlife management. The book's conservation message and practical ideas are as relevant today as they were when first written over fifty years ago. For the Health of the Land represents a stunning new addition to the literary legacy of Aldo Leopold.

Author: Brian Wilsey
Publisher: Oxford University Press
ISBN: 0191061948
Category : Science
Languages : en
Pages : 240

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Book Description
This accessible text provides a concise but comprehensive introduction to the biology of global grasslands. Grasslands are vast in their extent, with native and non-native grasslands now covering approximately 50% of the global terrestrial environment. They are also of vital importance to humans, providing essential ecosystem services and some of the most important areas for the production of food and fibre worldwide. It has been estimated that 60% of calories consumed by humans originate from grasses, and most grain consumed is produced in areas that were formerly grasslands or wetlands. Grasslands are also important because they are used to raise forage for livestock, represent a source of biofuels, sequester vast amounts of carbon, provide urban green-space, and hold vast amounts of biodiversity. Intact grasslands contain an incredibly fascinating set of plants, animals, and microbes that have interested several generations of biologists, generating pivotal studies to important theoretical questions in ecology. As with other titles in the Biology of Habitats Series, the emphasis is on the organisms that dominate this environment although restoration, conservation, and experimental aspects are also considered.

Author: Abad Chabbi
Publisher: MDPI
ISBN: 3039282220
Category : Science
Languages : en
Pages : 252

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Book Description
This book is a remarkable work that brings together the most recent international research on grassland management, covering a broad range of topics and geographical areas. The different contributions explore the complex relationships between landscape, climate features, and soil fertility with the support of observational data and modeling. Clearly, this is a wide and multifaceted area of research that opens up new prospects for the management of a biome, which should no longer be considered only as a feed resource for domestic herbivore farming, but also—and above all—as a source of ecosystem services to society and a contributor to the sustainability of agriculture. Textbooks like this positively demonstrate the importance and significance of how grassland science, when viewed in this way, can make tangible the progress in understanding the complexity of grassland management and its current and future challenges.

Author:
Publisher:
ISBN:
Category : Geographic information systems
Languages : en
Pages : 6

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The PRAIRIEMAP web site (http://prairiemap.wr.usgs.gov) contains links to partners, documentation of the data, and a directory of GIS data that can be downloaded.

Author: Edith B. Allen
Publisher: Routledge
ISBN: 1000305104
Category : Political Science
Languages : en
Pages : 211

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Book Description
This volume emphasizes application of the basic ecological relationships among plants, animals, microorganisms, the physical environment and man to reconstruct wildland ecosystems. It contains the proceedings of a symposium sponsored by the American Association for the Advancement of Science.

Author: Qing Zhang
Publisher: Frontiers Media SA
ISBN: 2832553923
Category : Science
Languages : en
Pages : 426

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Book Description
Biodiversity can provide a series of important ecosystem functions and ecosystem services, which meet the needs of human beings. Plants are the biological group with the highest carbon content on earth, their diversity has attracted increased attention. The interpretation of plant diversity patterns and drivers is crucial for the conservation and utilization of plant resources and is also one of the hot topics in plant science and ecology. There are already many studies on the patterns and drivers of plant diversity, including different diversity dimensions (e.g., taxonomic, phylogenetic, and functional diversity) and spatial scales (different plots/sites, watershed, country, continent, and globe). The mechanisms underlying plant diversity patterns are also quite complex. For example, many hypotheses are related to contemporary climate and soil conditions, with temperature, precipitation, and soil nutrient being the most discussed drivers. In addition, paleoclimate and geological events may also have a strong legacy on current plant diversity patterns. Except for these natural factors, many anthropogenic activities, including agriculture, deforestation, grazing, urbanization, and coal mining, are also important drivers of plant diversity. These anthropogenic activities can affect plant diversity patterns not only directly, but also indirectly through their effects on habitat loss and habitat fragmentation. Therefore, the current plant diversity patterns are the result of many interacting factors and need to be interpreted from a more comprehensive perspective. This Research Topic will therefore provide a platform for sufficient communication, aiming to integrate the research from different fields and deepen the understanding of the patterns and drivers of plant diversity. We encourage the submission of theoretical and experimental studies on different plant groups, such as seed plants, ferns, mosses, and algae. Studies based on new methods and technology (such as genomics and drones) are also welcomed. We welcome the following specific topics: • Effects of historical factors (such as paleoclimate, geological events) on plant diversity; • Plant diversity that driven by contemporary climate and anthropogenic activities; • The effect of habitat loss and fragmentation on plant diversity; • New methods of research on the patterns and drivers of plant diversity.