, Volume 34, Issue 1 Supplement, pp S14-S26
Date: 23 Feb 2005

Identifying Ecoregion Boundaries

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This article summarizes the rationale I used in identifying ecoregion boundaries on maps of the United States, North America, and the world’s continents, published from 1976 to 1998. The geographic reasoning used in drawing boundaries involves 20 principles, which are presented to stimulate discussion and further understanding. Brief background and references are provided for the principles.