An Ecological land classification framework for the United States ecologicallandcl1439dris Year: 1984 be to manage the area for livestock grazing or improve- ment of wildlife habitat. Decisions can then be made to manipulate the existing plant community through knowl- edge of its natural potential by changing management objectives or land treatments to address the management goals. Both existing vegetation and potential natural vege- tation information are important and widely used. In combination, they are valuable for understanding and managing the vegetation resource and the area on which
An Ecological land classification framework for the United States ecologicallandcl1439dris Year: 1984 be to manage the area for livestock grazing or improve- ment of wildlife habitat. Decisions can then be made to manipulate the existing plant community through knowl- edge of its natural potential by changing management objectives or land treatments to address the management goals. Both existing vegetation and potential natural vege- tation information are important and widely used. In combination, they are valuable for understanding and managing the vegetation resource and the area on which it is produced. Water (Aquatic) Element A water classification system should provide a frame- work to group open bodies of water according to their ability to support life on and in them. A system devel- oped on this basis would reflect the inherent potential of water to serve as a habitat or as a resource. A fully devel- oped hierarchical system that addresses local, State, regional, and national levels, however, is unavailable. There are classification systems for river and river zones based on dominant fish species, longitudinal distri- bution of benthic fauna, degree of productivity, nature of source, stream order, and selected chemical and phys- ical characteristics (Hawkes 1975, Hynes 1970, Pennak 1971). Worldwide classification systems, such as those of lilies and Botosaneau (1963) and Pennak (1971), are based on multiple characteristics that utilize more universal cri- teria than do local and regional systems. Classifications for lakes are generally based on geographical, hydrolog- ical, water-mixing, and trophic characteristics (Cole 1978, Hutchinson 1957, Wentz 1980, Wetzel 1975, Winter 1977). Estuaries have been classified according to topog- raphy (Pritchard 1952), salinity structure (Cameron and Pritchard 1963, Pritchard 1955), and stratification (Dyer 1973). Other classification systems incorporate water- related parameters and water bodies in a general context o
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