WWF Ecoregions - Terrestrial Ecoregions Legend
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https://cmr.earthdata.nasa.gov/search/concepts/C2232847837-CEOS_EXTRA.html
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资源简介：
An ecoregion is defined as a large area of land or water that contains a geographically distinct assemblage of natural communities that
(a) share a large majority of their species and ecological dynamics;
(b) share similar environmental conditions, and;
(c) interact ecologically in ways that are critical for their long-term persiste.
The Conservation Science Program has identified 825 terrestrial ecoregions across the globe, and a set of approximately 500 freshwater ecoregions is under development.
提供机构：
CEOS_EXTRA
