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Author: Publisher: UNEP/Earthprint ISBN: 9789280729528 Category : Nature Languages : en Pages : 70
Book Description
Population growth, urbanisation and economic growth in general, all exert pressure on water resources through increased demand and pollution. Water is essential for life and it's supply for safe drinking water, food, health and the environment needs to be secured. This 57 page summary with CD-ROM provides the status of water resources across the continents of Africa and Asia for major rivers, lakes and groundwater basins. The joint Africa-Asia study is intended for managers, planners and other key decision-makers in water resources management and governments.
Author: Publisher: UNEP/Earthprint ISBN: 9789280729528 Category : Nature Languages : en Pages : 70
Book Description
Population growth, urbanisation and economic growth in general, all exert pressure on water resources through increased demand and pollution. Water is essential for life and it's supply for safe drinking water, food, health and the environment needs to be secured. This 57 page summary with CD-ROM provides the status of water resources across the continents of Africa and Asia for major rivers, lakes and groundwater basins. The joint Africa-Asia study is intended for managers, planners and other key decision-makers in water resources management and governments.
Author: David Dudgeon Publisher: Cambridge University Press ISBN: 1108882625 Category : Nature Languages : en Pages : 517
Book Description
Growing human populations and higher demands for water impose increasing impacts and stresses upon freshwater biodiversity. Their combined effects have made these animals more endangered than their terrestrial and marine counterparts. Overuse and contamination of water, overexploitation and overfishing, introduction of alien species, and alteration of natural flow regimes have led to a 'great thinning' and declines in abundance of freshwater animals, a 'great shrinking' in body size with reductions in large species, and a 'great mixing' whereby the spread of introduced species has tended to homogenize previously dissimilar communities in different parts of the world. Climate change and warming temperatures will alter global water availability, and exacerbate the other threat factors. What conservation action is needed to halt or reverse these trends, and preserve freshwater biodiversity in a rapidly changing world? This book offers the tools and approaches that can be deployed to help conserve freshwater biodiversity.
Author: Publisher: ISBN: Category : Fresh water Languages : en Pages :
Book Description
"Acknowledging the urgency of the vulnerability issues affecting the livelihoods of Africa's people and environment, UNEP-DEWA and START [System for Analysis, Research and Training], initiated a study in February 2003 to assess the 'Vulnerability of Water Resources to Environmental Change in Africa.' The goal of the study was to facilitate the management of vulnerability risks at transboundary, national, and local river/lake/groundwater basin levels, by assessing the impacts of environmental and human-driven changes on water resources. This publication documents the findings of the second phase of the study, which was completed in May 2006. The aim of this phase was to accomplish a wider, continental, coverage of river/lake/groundwater basins (i.e., building upon the first phase), and expanding the network of researchers"--Page xiv.
Author: Angela Arthington Publisher: Univ of California Press ISBN: 0520953452 Category : Nature Languages : en Pages : 422
Book Description
Environmental Flows describes the timing, quality, and quantity of water flows required to sustain freshwater and estuarine ecosystems and the human well-being and livelihoods that depend upon them. It answers crucial questions about the flow of water within and between different kinds of ecosystems. What happens when the flow or the availability of water is curtailed or diverted, either naturally or by human activity? How will climate change alter the availability of water and impact aquatic ecosystems? Methodological developments from the simplest hydrological formulas to large-scale frameworks that inform water management make this book a must-read for water managers and freshwater and estuarine ecologists contending with ever-changing conditions influencing the flow of water.
Author: Anja du Plessis Publisher: Springer ISBN: 3030031861 Category : Science Languages : en Pages : 299
Book Description
The book presents an interdisciplinary systematic evaluation of increasing water stress and scarcity over the globe and specifically South Africa. South Africa is used as the prime example as the country is experiencing similar water challenges in terms of availability and quality as most regions across the globe. Water availability is predominantly used to illustrate water scarcity however, continued degradation of the world’s freshwater resources, by a multitude of natural and anthropogenic factors, have consequently exacerbated water stress and scarcity due to it being of insufficient quality for various uses. The increase of water scarcity through both natural and anthropogenic factors has in turn led to water being viewed as an increasing risk within all spheres. Water as a source of conflict has come to the forefront especially within regions which struggle to meet the increasing demands from different water users and trying to achieve future sustainability of the resource. The increase of water scarcity and stress as well as the continued pressure of population and economic growth has brought various new challenges into play. This book focuses on water as an increasing risk over the globe and specifically South Africa by reviewing both water availability and quality, evaluating water as a global and national risk. The book concludes by focusing on current limitations, necessary strategic actions as well as possible policy-related changes which may be required to adapt to future water challenges and to lessen water as an increasing risk.
Author: Tim Caro Publisher: Island Press ISBN: 159726959X Category : Nature Languages : en Pages : 394
Book Description
The vast scope of conservation problems has forced biologists and managers to rely on "surrogate" species to serve as shortcuts to guide their decision making. These species-known by a host of different terms, including indicator, umbrella, and flagship species-act as proxies to represent larger conservation issues, such as the location of biodiversity hotspots or general ecosystem health. Synthesizing an immense body of literature, conservation biologist and field researcher Tim Caro offers systematic definitions of surrogate species concepts, explores biological theories that underlie them, considers how surrogate species are chosen, critically examines evidence for and against their utility, and makes recommendations for their continued use. The book clarifies terminology and contrasts how different terms are used in the real world considers the ecological, taxonomic, and political underpinnings of these shortcuts identifies criteria that make for good surrogate species outlines the circumstances where the application of the surrogate species concept shows promise Conservation by Proxy is a benchmark reference that provides clear definitions and common understanding of the evidence and theory behind surrogate species. It is the first book to review and bring together literature on more than fifteen types of surrogate species, enabling us to assess their role in conservation and offering guidelines on how they can be used most effectively.
Author: National Research Council Publisher: National Academies Press ISBN: 0309145880 Category : Science Languages : en Pages : 526
Book Description
Climate change is occurring, is caused largely by human activities, and poses significant risks for-and in many cases is already affecting-a broad range of human and natural systems. The compelling case for these conclusions is provided in Advancing the Science of Climate Change, part of a congressionally requested suite of studies known as America's Climate Choices. While noting that there is always more to learn and that the scientific process is never closed, the book shows that hypotheses about climate change are supported by multiple lines of evidence and have stood firm in the face of serious debate and careful evaluation of alternative explanations. As decision makers respond to these risks, the nation's scientific enterprise can contribute through research that improves understanding of the causes and consequences of climate change and also is useful to decision makers at the local, regional, national, and international levels. The book identifies decisions being made in 12 sectors, ranging from agriculture to transportation, to identify decisions being made in response to climate change. Advancing the Science of Climate Change calls for a single federal entity or program to coordinate a national, multidisciplinary research effort aimed at improving both understanding and responses to climate change. Seven cross-cutting research themes are identified to support this scientific enterprise. In addition, leaders of federal climate research should redouble efforts to deploy a comprehensive climate observing system, improve climate models and other analytical tools, invest in human capital, and improve linkages between research and decisions by forming partnerships with action-oriented programs.
Author: Martin Kernan Publisher: John Wiley & Sons ISBN: 1444391275 Category : Science Languages : en Pages : 470
Book Description
This text examines the impact of climate change on freshwater ecosystems, past, present and future. It especially considers the interactions between climate change and other drivers of change including hydromorphological modification, nutrient loading, acid deposition and contamination by toxic substances using evidence from palaeolimnology, time-series analysis, space-for-time substitution, laboratory and field experiments and process modelling. The book evaluates these processes in relation to extreme events, seasonal changes in ecosystems, trends over decadal-scale time periods, mitigation strategies and ecosystem recovery. The book is also concerned with how aspects of hydrophysical, hydrochemical and ecological change can be used as early indicators of climate change in aquatic ecosystems and it addresses the implications of future climate change for freshwater ecosystem management at the catchment scale. This is an ideal book for the scientific research community, but is also accessible to Masters and senior undergraduate students.
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Author: David Dudgeon
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Author: Angela Arthington
Author: Anja du Plessis
Author: Tim Caro
Author: National Research Council
Author: Martin Kernan