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Level IV ecoregions (denoted by numbers and letters) are a further subdivision of Level III ecoregions (denoted by numbers alone). [ 2 ] [ 3 ] In general, Illinois transitions from the forests, to savannah , to tall grass prairie , and is now largely used for agriculture or urbanized, although in its far south are the forested highlands of the ...
Pages in category "Ecoregions of Illinois" The following 4 pages are in this category, out of 4 total. This list may not reflect recent changes. *
This region contains a higher concentration of lakes with lower trophic states than in the other level IV ecoregions of the Southeastern Wisconsin Till Plains. The soils are clayey to the east, especially along the Lake Michigan shore, and more sandy to the west, but generally less clayey than the soils in ecoregion 53d to the north.
Ecoregions of North America, featuring the 50 United States, the District of Columbia and the five inhabited territories Wikipedia has articles relating to several ecoregion classification systems , defined by the conservation group World Wildlife Fund (WWF), the Commission for Environmental Cooperation (CEC), and like agencies around the world.
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.
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.
The classification system has four levels. Only the first three levels are shown on this list. "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 of Illinois (4 P) F. Forests of Illinois (2 C, 12 P) G. ... Pages in category "Geography of Illinois" The following 4 pages are in this category, out of 4 ...