Tropical-temperate climate and ecological transition zones in North America (IMAGE)

University of California - Berkeley

Tropical-temperate climate and ecological transition zones in North America

Caption

A map showing North America's tropical-to-temperate transition zone. Red, orange and yellow depict the more tropical zones, and blues depict the more temperate zones, based on the coldest recorded temperature for each area between 1980 and 2009. Photos show some cold-sensitive plants and animals with northern range limits governed by winter cold temperature extremes.

Credit

USGS

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