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Three level I areas were not subdivided for level 2. [2] Level III subdivides the continent into 182 smaller ecoregions; of these, 104 lie partly or wholly with the United States. [1] [3] Level IV is a further subdivision of Level III ecoregions. Level IV mapping is still underway but is complete across most of the United States. For an example ...
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories. The following is a list of ecoregions in the United States as identified by the World Wide Fund for Nature (WWF). The United States is a megadiverse country with a high level of endemism across a wide variety of ecosystems.
"Level I" divides North America into 15 broad ecoregions. "Level II" subdivides the continent into 52 smaller ecoregions. "Level III" subdivides those regions again into 182 ecoregions. [1] [2] "Level IV" is a further subdivision of Level III ecoregions. Level IV mapping is still underway but is complete across most of the United States. For an ...
Terrestrial Ecoregions of the World (Olson et al. 2001, BioScience) WWF terrestrial ecoregions of the world One way of mapping the world into 18 terrestrial vegetation biomes, each containing one or more ecoregions EPA level III ecoregions in the contiguous United States. Alaska ecoregions (102-120) not shown.
Pages in category "Lists of ecoregions in the United States" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes .
Lists of ecoregions in the United States may refer to: List of ecoregions in the United States (EPA) , United States Environmental Protection Agency system List of ecoregions in the United States (WWF) , World Wildlife Fund system
The ICUN compiled the “Red List”, evaluating the global conservation status of species based on the threat level. [15] The list separates species into threat levels ranging from least concern to extinct, aiding in directing efforts to mitigate species decline [16] This assessment evaluated factors contributing to species extinction like population size, trends, distributions, and threats.
Temperate broadleaf and mixed forests in the United States (1 C, 38 P) Temperate coniferous forests of the United States (1 C, 31 P) Temperate grasslands, savannas, and shrublands in the United States (2 C, 25 P)