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Author : Catherine E. Puckett Haecker,Paul A. Opler,Peter D. Doran
Publisher : Geological Survey (USGS)
Page : 482 pages
File Size : 43,7 Mb
Release : 1998
Category : Nature
ISBN : IND:30000062893700
Assesses the health of the United States plants, animals, and ecosystems.
Author : Anonim
Publisher : Unknown
Page : 964 pages
File Size : 49,9 Mb
Release : 1998
Category : Biodiversity
ISBN : LCCN:97035780
Author : Anonim
Publisher : Unknown
Page : 452 pages
File Size : 54,6 Mb
Release : 1998
Category : Biodiversity
ISBN : MINN:31951D019248480
Author : Catherine E. Puckett Haecker,Paul A. Opler,Peter D. Doran
Publisher : Unknown
Page : 544 pages
File Size : 40,9 Mb
Release : 1998
Category : Biodiversity
ISBN : IND:30000062893692
Author : Anonim
Publisher : Unknown
Page : 0 pages
File Size : 52,8 Mb
Release : 1999
Category : Electronic
ISBN : OCLC:1431007599
Author : Anonim
Publisher : Unknown
Page : 48 pages
File Size : 41,5 Mb
Release : 1998
Category : Biodiversity
ISBN : MINN:31951D01541902F
Lists the contents of the full two-volume report, and gives the text of the chapter on the Mississippi River from vol. 1.
Author : Peter H. Raven
Publisher : National Academies Press
Page : 226 pages
File Size : 50,7 Mb
Release : 1993
Category : Electronic
ISBN : 0390049840
Author : Anonim
Publisher : Unknown
Page : 660 pages
File Size : 54,8 Mb
Release : 2000
Category : Environmental impact statements
ISBN : MINN:31951D01960120A
This describes a strategy for conserving National Forest System inventoried roadless areas and their important values. It has an analysis of management options and the Forest Service's preferred alternative.
Author : Anonim
Publisher : Unknown
Page : 666 pages
File Size : 55,6 Mb
Release : 2000
Category : Forest policy
ISBN : UVA:X004427475
Author : Lisa Idzikowski
Publisher : Greenhaven Publishing LLC
Page : 176 pages
File Size : 49,5 Mb
Release : 2019-12-15
Category : Young Adult Nonfiction
ISBN : 9781534506428
Biodiversity, the variety of life on Earth, is vital to the health of the planet. But overdevelopment and deforestation have threatened biodiversity, as have pollution, overfishing, and hunting and poaching. Conservation efforts must be intensified in order to avoid collapse of our valuable ecosystems. The viewpoints in this volume address the importance of biodiversity and what has contributed to its loss, examples of crises in different parts of the world, and what can be done to ensure the biodiversity of the planet is preserved.
Author : National Research Council,Transportation Research Board,Division on Earth and Life Studies,Water Science and Technology Board,Committee to Review the Corps of Engineers Restructured Upper Mississippi River-Illinois Waterway Feasibility Study
Publisher : National Academies Press
Page : 101 pages
File Size : 49,6 Mb
Release : 2005-01-22
Category : Science
ISBN : 9780309094368
For the past few years, the Corps has been working on what is known as the Restructured Upper Mississippi River-Illinois Waterway Feasibility Study, the heart of which is a multibillion-dollar proposal to double the length of up to a dozen locks on the river. The Research Council first reviewed the feasibility study in 2001 during controversies over the accuracy of models being used by the Corps to justify lock expansion based on increased demand for barge transportation. More than 100 million tons of cargo-half of it grain destined for international markets, the other half goods such as construction materials, coal, and chemicals-are shipped along the navigation system each year. The locks, which along with dams allow barges to traverse uneven river depths, were originally designed for "tows" of barges up to 600 feet long, but the length of a typical tow has increased, forcing the Corps to look for ways to relieve congestion. The book finds the U.S. Army Corps of Engineers has made good progress in broadening its proposed plan for navigation improvements on the Upper Mississippi River-Illinois Waterway system to give greater consideration to ecological restoration. However, the plan still does not provide sufficient economic justification for expanding locks on the rivers because of flaws in the models the Corps used to predict demand for barge transportation. Little attention is paid to inexpensive, nonstructural navigation improvements that could help better manage existing levels of barge traffic. The revised plan has been usefully expanded to include many creative and potentially useful ecosystem restoration measures. These measures, however, should be more firmly grounded in river science principles and more broadly consider ways the river's ecology might affect or be affected by navigation, recreation and other uses.
Author : Anonim
Publisher : Unknown
Page : 436 pages
File Size : 55,5 Mb
Release : 2006
Category : Electronic
ISBN : NWU:35556036469955
Author : Anonim
Publisher : Elsevier
Page : 3542 pages
File Size : 43,6 Mb
Release : 2020-06-26
Category : Science
ISBN : 9780128160978
Encyclopedia of the World’s Biomes is a unique, five volume reference that provides a global synthesis of biomes, including the latest science. All of the book's chapters follow a common thematic order that spans biodiversity importance, principal anthropogenic stressors and trends, changing climatic conditions, and conservation strategies for maintaining biomes in an increasingly human-dominated world. This work is a one-stop shop that gives users access to up-to-date, informative articles that go deeper in content than any currently available publication. Offers students and researchers a one-stop shop for information currently only available in scattered or non-technical sources Authored and edited by top scientists in the field Concisely written to guide the reader though the topic Includes meaningful illustrations and suggests further reading for those needing more specific information
Author : United States. Congress. House. Committee on Agriculture
Publisher : Unknown
Page : 184 pages
File Size : 40,6 Mb
Release : 2003
Category : Science
ISBN : UOM:39015090375398
Author : Lauchlan H. Fraser,Paul A. Keddy
Publisher : Cambridge University Press
Page : 500 pages
File Size : 46,7 Mb
Release : 2005-06-30
Category : Nature
ISBN : 9781139443951
This volume presents the views of leading experts on each of the world's largest wetland systems. This international team of authors share their understanding of the ecological dynamics of large wetlands and their significance, and emphasise their need of conservation.