Abstract
The North Slope of the Brooks Range in Alaska spans three physiographic provinces: the Coastal Plain, the Brooks Range Foothills, and the Brooks Range proper (Hultén 1968). The vegetation of the foothills province, which includes the Imnavait Creek watershed, is composed of a complex mosaic of communities that is tightly coupled to environmental gradients. This mosaic encompasses exposed upland ridges and mountain slopes, which have communities similar to those found in large areas of the High Arctic (Bliss and Matveya 1992), and, at the other extreme, the communities in valley basins resemble the sedge meadows of the Coastal Plain (Webber 1978). The distribution of these tundra communities is influenced by glacial history and topography, soil development, cryoturbation effects, and local erosion (Walker and Everett 1991; Chap. 4 this Vol.), as well as by summer thaw depth and soil water mobility (Giblin et al. 1992).
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