A classification of North American biotic communities by David Earl Brown, Frank Reichenbacher, Susan E. Franson

By David Earl Brown, Frank Reichenbacher, Susan E. Franson

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As such, these systems and maps are frequently limited and are not easily modified when higher or lower levels of assessment are desired. These limitations have caused resource management agencies to combine, create, and adapt a variety of classification systems in their inventories of biotic resources. , Bailey and Cushwa 1981). The profusion of classification systems has prompted national governments to seek a singular, standardized system. , Wiken 1986, Meidinger and Pojar 1991, and MacKinnon, Meidinger, and Klinka 1992).

Most importantly, he recognized, to his everlasting credit, that biogeographical understanding could not be limited by political boundaries. , Merriam 1903, Stejneger and Miller 1903, and Goldman 1920). In 1889 Merriam took time off from his duties in Washington to conduct a biological survey of the San Francisco Peaks and its environs in northern Arizona Territory. While conducting this investigation, Merriam and his partner Leonhard Stejneger noted, as did Humboldt, that the altitudinal belts of vegetation encountered at different elevations corresponded to the vegetation found at various latitudes.

L. Minckley, Arizona State University, Tempe; James M. S. Environmental Protection Agency, Corvallis, Oregon; Barry Spicer, Data Branch Supervisor with the Arizona Game and Fish Department, Phoenix; M. D. F. Udvardy, California State University, Sacramento; Jan W. van Wagtendonk, Research Scientist with the National Park Service, Yosemite National Park, California, and Denis White, Oregon State University, Corvallis, for their editorial comments and review. Their helpful suggestions were as essential as they were thought-provoking and improved the manuscript immensely.

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