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Nearctic ecozone
The Nearctic is one of the eight terrestrial ecozones constituting the Earth's land surface.
The Nearctic ecozone covers most of North America, including Greenland, Central Florida, and the highlands of Mexico. The parts of North America that are not in the Nearctic ecozone are Eastern Mexico, Southern Florida, Central America, and the Caribbean islands which are part of the Neotropic ecozone, together with South America.
==Major ecological regions==
The World Wildlife Fund (WWF) divides the Nearctic into four bioregions, defined as "geographic clusters of ecoregions that may span several habitat types, but have strong biogeographic affinities, particularly at taxonomic levels higher than the species level (genus, family)."
抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』
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