The list of ecoregions in Indiana are listings of

terrestrial ecoregions An ecoregion (ecological region) or ecozone (ecological zone) is an ecologically and geographically defined area that is smaller than a bioregion, which in turn is smaller than a biogeographic realm. Ecoregions cover relatively large areas of l ...

(see also,

ecosystem An ecosystem (or ecological system) consists of all the organisms and the physical environment with which they interact. These biotic and abiotic components are linked together through nutrient cycles and energy flows. Energy enters the syste ...

) in the United States' State of

Indiana Indiana () is a U.S. state in the Midwestern United States. It is the 38th-largest by area and the 17th-most populous of the 50 States. Its capital and largest city is Indianapolis. Indiana was admitted to the United States as the 19th s ...

, as defined separately by the

United States Environmental Protection Agency The Environmental Protection Agency (EPA) is an independent executive agency of the United States federal government tasked with environmental protection matters. President Richard Nixon proposed the establishment of EPA on July 9, 1970; it ...

(USEPA), and the

World Wildlife Fund The World Wide Fund for Nature Inc. (WWF) is an international non-governmental organization founded in 1961 that works in the field of wilderness preservation and the reduction of human impact on the environment. It was formerly named the Wo ...

USEPA

The USEPA ecoregion classification system has four levels, but only Levels I, III, and IV are shown on this list. Level I divides North America into 15 broad ecoregions (or biomes). Indiana is within the Eastern Temperate Forest environment, Level I region. Level IV ecoregions (denoted by numbers and letters) are a further subdivision of Level III ecoregions (denoted by numbers alone). tp://ftp.epa.gov/wed/ecoregions/in/OHINFront.pdf Ecoregions of Indiana and OhioUSEPA * 54 Central Corn Belt Plains **54a - Illinois/Indiana

Prairie Prairies are ecosystems considered part of the temperate grasslands, savannas, and shrublands biome by ecologists, based on similar temperate climates, moderate rainfall, and a composition of grasses, herbs, and shrubs, rather than trees, as the ...

**54b - Chicago Lake Plain **54c - Kankakee Marsh **54d - Sand Area * 55 Eastern Corn Belt Plains **55a - The Clayey, High Lime

Till image:Geschiebemergel.JPG, Closeup of glacial till. Note that the larger grains (pebbles and gravel) in the till are completely surrounded by the matrix of finer material (silt and sand), and this characteristic, known as ''matrix support'', is d ...

Plains **55b - The Loamy, High Lime Till Plains **55d - The Pre-Wisconsinan Drift Plains **55f - The

Whitewater Whitewater forms in a rapid context, in particular, when a river's gradient changes enough to generate so much turbulence that air is trapped within the water. This forms an unstable current that froths, making the water appear opaque and ...

Interlobate Area * 56 Southern Michigan/Northern Indiana Drift Plains **56a - The Lake Country **56b - The Elkhart Till Plains **56c - The Middle Tippecanoe Plains **56d - The Michigan Lake Plain * 57 Huron/Erie Lake Plains **57a - The Maumee Lake Plains * 71 Interior Plateau **71a - The Crawford Uplands **71b - The Mitchell Plain **71c - The Norman Upland **71d - The Northern Bluegrass * 72 Interior River Valleys and Hills **72a - Wabash-Ohio Bottomlands **72b - Glaciated Wabash Lowlands **72c - The Southern Wabash Lowlands

World Wildlife Fund

References

*See: Ricketts, Taylor H; Eric Dinerstein; David M. Olson; Colby J. Loucks; et al. (1999). ''Terrestrial Ecoregions of North America: a Conservation Assessment.'' Island Press;

Washington, DC ) , image_skyline = , image_caption = Clockwise from top left: the Washington Monument and Lincoln Memorial on the National Mall, United States Capitol, Logan Circle, Jefferson Memorial, White House, Adams Morgan ...

USEPA

World Wildlife Fund

References

See also