Suchergebnisse

Nature's Geometry -- Regional-Scale Ecosystem Units, Ecoregions -- An Ecoregional Approach to Sustaining Ecosystems -- Significance to Ecosystem Management -- How Land-Management Agencies, Conservation Organizations, and Others Use Ecoregion Maps -- Summary and Conclusions.

Ecoregions applies the principles described in Bailey's Ecosystem Geography to describe and characterize the major terrestrial and aquatic ecological zones of the Earth. Robert Bailey's system for classifying ecoregions has had a major influence, and has been adopted by major organizations such as the US Forest Service and The Nature Conservancy. This book includes numerous photographs of representative ecoregions, and outstanding color figures are complemented by two full-color maps showing the major ecoregions of the continents and of the oceans

The analysis and management of ecosystems rely increasingly on sound geographical knowledge. Ecosystem Geography is a landmark contribution which brings the geographer's tools - maps, scales, boundaries, and units - to the study of ecosystems. The author, a senior geographer and program manager with the U.S. Forest Service, has distilled more than two decades of research on ecosystem mapping and classification. His work has had a growing influence on how government and academic scientists are using ecological data to monitor biodiversity, manage land holdings, and interpret the results of climatic change. Ecosystem Geography features spectacular graphics, including diagrams, photographs, and abundant maps. It will be welcomed by ecologists, geographers, land and resource specialists, and anyone involved in the study of ecosystems

AbstractThe U.S. Army manages over 12 million acres of federal training and testing lands contained within military installations throughout the 50 United States. These lands are a critical national asset for defense readiness, dedicated to providing realistic training and testing environments for army units and equipment. The locations and physiographic diversity of the Army's current land inventory is a function of historical precedent, modern‐day land expansions, and requirements for strategic projection of forces. Many Army lands are relatively undeveloped, providing important ecological settings for a variety of flora and fauna, including many threatened and endangered species. As a responsible land steward, the Army is committed to protection and sustainable use of these natural resources, with concurrent benefit to both the army and the public. Army training and testing activities can cause environmental impacts that may be detrimental to the long‐term sustainment of ecological functions. These realities pose significant land management challenges to the Army. The application of established ecologicalframeworks for strategically assessing land‐use impacts and land management approaches is demonstrated for 31 major Army installations, using Bailey's "ecoregion classification system," developed by the U.S. Forest Service. The Ecoregions framework is used to (1) classify and catalog the ecological diversity of Army lands, (2) provide a comparative framework for assessing land resiliencyfrom Army impacts, and (3) extrapolate knowledge of perturbed ecosystem behavior and response from one army installation to others in similar ecoregions.