Titlebook: Ecosystem Geography; From Ecoregions to S Robert G. Bailey Textbook 2009Latest edition Springer Science+Business Media, LLC 2009 Controllin

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Textbook 2009Latest editionhis book outlines a system that organizes the Earth into a hierarchy T of increasingly ?ner-scale ecosystems that can serve as a consistent framework for ecological analysis and management. The system consists of a three-level hierarchy of nested ecosystem units and their associated mapping criteria

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Macroscale: Macroclimatic Differentiation (Ecoregions),solar system (and possibly throughout much of the universe) combined with our atmosphere enables water to exist on earth in all three states of liquid, solid, and gas. The water molecule is unusual in that its solid form is less dense than its liquid form. This enables ice to float, thus forming hug

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Ecoregions of the United States,s at the domain and division levels. By applying the same classification and criteria, we obtain the picture shown in Figure 7.1. Subdivisions, called provinces, are delineated and described elsewhere (Bailey 1995).

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Ecoregion Redistribution Under Climate Change,ailing plant formations determined by those conditions. Climate, as a source of energy and water, acts as the primary control for ecosystem distribution, including ecoregions. As climate changes, so do ecosystems, as a petrified forest lying in a desert attests (Fig. 8.1). With recognition that clim

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Mesoscale: Landform Differentiation (Landscape Mosaics),road-scale landforms break up the east–west climatic pattern that would occur otherwise and provide a basis for further differentiation of ecosystems—the landscape mosaics mentioned earlier. The character of a landscape mosaic with identical geology will vary by the climatic zone. For example, verti