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Author:
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 52
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Book Description
Author:
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 52
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 52
Get Book Here
Book Description
Author:
Publisher:
ISBN:
Category : Anadromous fishes
Languages : en
Pages : 48
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Book Description
Author:
Publisher:
ISBN:
Category : Pacific salmon fisheries
Languages : en
Pages : 108
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Book Description
Author: Matthew J. Sobel
Publisher:
ISBN:
Category : Chinook salmon
Languages : en
Pages : 114
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Book Description
Author: Daniel B. Botkin
Publisher: Oxford University Press
ISBN: 019997697X
Category : Science
Languages : en
Pages : 449
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Book Description
Why do we keep talking about so many environmental problems and rarely solve any? If these are scientific issues, then why can't scientists solve them or at least agree on what to do? In his new book, The Moon in the Nautilus Shell, ecologist Daniel Botkin explains why. For one thing, although we live in a world of constantly changing environments and talk a lot about climate change, most of our environmental laws, policies, and scientific premises are based on the idea that the environment is constant, never changing, except when people affect it. For another, we have lost contact with nature in personal ways. Disconnected from our surroundings, we lack the deep understanding and feelings about the environment to make meaningful judgments. The environment has become just another one of those special interests that interferes with our lives. Poised to be a core text of the twenty-first century environmental movement, The Moon in the Nautilus Shell challenges us to think critically about our role in nature.
Author: D.P. Loucks
Publisher: Springer Science & Business Media
ISBN: 9401728941
Category : Science
Languages : en
Pages : 500
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Book Description
In the continued quest for increased economic benefits from our water resources, numerous structures and operating policies for controlling the river flow have been built and implemented. These structures and associated operating policies can facilitate navigation; they can provide greater quantities of reliable water supplies to meet agricultural, industrial and municipal water demands; they can generate hydroelectric power and energy; and they can provide increased flood protection, recreation, and other benefits. Over the past half-century we have converted many of our rivers into engineered waterways. These straightened, often periodically dredged, engineered rivers are complete with dikes, reservoirs, weirs, and diversion canals. All this engineering has enhanced economic development. However, as rivers and their floodplains become stressed from the excessive use and misuse of their resources, their contribution to economic development can be threatened. Evidence of economic and ecological degradation, especially in relatively large river systems such as the Danube, the Mississippi, the Rhine, and the Volga, has increased our appreciation of beneficial roles natural aquatic and terrestrial ecosystems play in water quantity and quality management. We have recognized the need to pay more attention to letting nature help us regulate water quantity and quality rather than working against nature and its variabilities and uncertainties. Today there are efforts underway in many developed river basins to 'de engineer' or return these straightened and controlled rivers to a more natural state.
Author: John M. Calhoun
Publisher:
ISBN:
Category : Forest ecology
Languages : en
Pages : 358
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Book Description
Author:
Publisher:
ISBN:
Category : Biodiversity
Languages : en
Pages : 64
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Book Description
Author: Curtis H. Freese
Publisher:
ISBN:
Category : Business & Economics
Languages : en
Pages : 728
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Book Description
In Harvesting Wild Species Curtis Freese draws together a diverse group of authorities to discuss the conditions under which commercial use may serve as a conservation tool. Presenting fifteen case studies from around the world - in areas ranging from fisheries and forestry to non-timber forest products and trophy hunting - the authors explore the link between sustainable development and biodiversity conservation. Based on a study commissioned by the World Wide Fund for Nature, Harvesting Wild Species aims to raise among environmentalists, policy makers, funding agencies, students, and researchers an awareness of the role of economic incentives in conservation efforts.
