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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.
Pages in category "Ecoregions of Nebraska" The following 5 pages are in this category, out of 5 total. This list may not reflect recent changes. C. Corn Belt; H.
The Western Corn Belt Plains is a Level III ecoregion designated by the Environmental Protection Agency (EPA) in seven U.S. states, though predominantly in Iowa. It has been subdivided into fifteen Level IV ecoregions. [1] [2]
"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.
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.
It is a transition zone between the Central tall grasslands and Central forest-grasslands transition ecoregions to the east and the Western short grasslands to the west, while to the north lie the Northern mixed grasslands, which have a cooler temperature and a much shorter growing season. [2] The Edwards Plateau Savannas lie to the south.
Ecoregions of Nebraska (5 P) Energy in Nebraska (2 C, 4 P) N. Natural history of Nebraska (9 C, 3 P) P. Protected areas of Nebraska (14 C, 17 P) S. Superfund sites in ...
S. Sagebrush steppe; Sierra Madre Occidental pine–oak forests; Sierra Madre Oriental pine–oak forests; Snake River Plain (ecoregion) Snake–Columbia shrub steppe