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Author: Institute of Ecology
Publisher:
ISBN:
Category : Biologists
Languages : en
Pages : 736
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Book Description
Author: Institute of Ecology
Publisher:
ISBN:
Category : Biologists
Languages : en
Pages : 736
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Book Description
Author: Earl L. Bozeman
Publisher:
ISBN:
Category : Alewife
Languages : en
Pages : 28
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Book Description
Author:
Publisher:
ISBN:
Category :
Languages : en
Pages : 720
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Book Description
Author: Leandro Miranda
Publisher:
ISBN: 9780692798720
Category :
Languages : en
Pages : 306
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Book Description
Author: Keith A. Whisenant
Publisher:
ISBN:
Category : Ambloplites constellatus
Languages : en
Pages : 64
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Book Description
Author: Institute of Ecology
Publisher:
ISBN:
Category : Conservation of natural resources
Languages : en
Pages : 726
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Book Description
Author: Gordon Mueller
Publisher:
ISBN:
Category : Colorado River (Colo.-Mexico)
Languages : en
Pages : 90
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Book Description
The Colorado River had one of the most unique fish communities in the world. Seventy-five percent of those species were found nowhere else in the world. Settlement of the lower basin brought dramatic change to both the river and its native fish. Those changes began more than 120 years ago as settlers began stocking nonnative fishes. By 1930, nonnative fish had spread throughout the lower basin and replaced native communities. All resemblance of historic river conditions faded with the construction of Hoover Dam in 1935 and other large water development projects. Today, few remember what the Colorado River was really like. Seven of the nine mainstream fishes are now Federally-protected as endangered. Federal and state agencies are attempting to recover these fish. However, progress has been frustrated due to the severity of human impact. This report represents testimony, old descriptions, and photographs describing the changes that have taken place in hopes that it will provide managers, biologists, and the interested public a better appreciation of the environment that shaped these unique fish.
Author: Institute of Ecology
Publisher:
ISBN:
Category : Biologists
Languages : en
Pages : 732
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Book Description
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.
Author: U.S. Global Change Research Program
Publisher: Cambridge University Press
ISBN: 0521144078
Category : Business & Economics
Languages : en
Pages : 193
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Book Description
Summarizes the science of climate change and impacts on the United States, for the public and policymakers.
