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. 2018 Jun 8;109(5):585–597. doi: 10.1093/jhered/esy020

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© The American Genetic Association 2018.

This is an Open Access article distributed under the terms of the Creative Commons Attribution Non-Commercial License (http://creativecommons.org/licenses/by-nc/4.0/), which permits non-commercial re-use, distribution, and reproduction in any medium, provided the original work is properly cited. For commercial re-use, please contact journals.permissions@oup.com

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Figure 2. — North American level-1 ecoregions (modified from Commission for Environmental Cooperation 1997). Ecoregion names: 1 = Arctic Cordillera; 2 = Tundra; 3 = Taiga; 4 = Hudson Plains; 5 = Northern Forests; 6 = Northwestern Forested Mountains; 7 = Marine West Coast Forests; 8 = Eastern Temperate Forests; 9 = Great Plains; 10 = North American Deserts; 11 = Mediterranean California; 12 = Southern Semi-Arid Highlands; 13 = Temperate Sierras; 14 = Tropical Dry Forests; 15 = Tropical Humid Forests.