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The Upper Midwest is a northern subregion of the U.S. Census Bureau 's Midwestern United States. Although the exact boundaries are not uniformly agreed upon, the region is usually defined to include the states of Iowa, Michigan, Minnesota and Wisconsin; some definitions include North Dakota, South Dakota, and parts of Nebraska and Illinois.
The catastrophic drought continued across the Upper Midwest and northern Great Plains states during 1989, not officially ending until 1990. [6] [7] Dry conditions continued during 1989, affecting Iowa, Illinois, Missouri, parts of Nebraska, [8] [9] Minnesota, [10] [11] Kansas and large portions of Colorado.
4.7% [1] The Upper Midwest forest–savanna transition is a terrestrial ecoregion that is defined by the World Wildlife Fund. An oak savanna plant community located in the Upper Midwest region of the United States, it is an ecotone (a transitional area) between the tallgrass prairies to the west and the temperate deciduous forests to the east.
The Driftless Area is a USDA Level III Ecoregion: Ecoregion 52. The Driftless Area takes up a large portion of the Upper Midwest forest–savanna transition. The eastern section of the Driftless Area in Minnesota is called the Blufflands, due to the steep bluffs and cliffs around the river valleys. The western half is known as the Rochester ...
The Upper Mississippi River National Wildlife and Fish Refuge is a 240,000-acre (970 km 2), [2] 261-mile long (420 km) National Wildlife Refuge located in and along the Upper Mississippi River. It runs from Wabasha, Minnesota in the north to Rock Island, Illinois in the south. (United States Fish and Wildlife Service)
The survey data were from the land cover/land use geographic information created by the U.S. Geological Survey Upper Midwest Environmental Sciences Center on the basis of interpretation of aerial photography of 1989. Macrophytes are an important part of healthy ecosystems. They provide habitat, refuge, and food for fish, wildlife, and other ...
The Ogallala Aquifer (oh-gə-LAH-lə) is a shallow water table aquifer surrounded by sand, silt, clay, and gravel located beneath the Great Plains in the United States. As one of the world's largest aquifers, it underlies an area of approximately 174,000 sq mi (450,000 km 2) in portions of eight states (South Dakota, Nebraska, Wyoming, Colorado, Kansas, Oklahoma, New Mexico, and Texas). [1]
The Midwestern United States, also referred to as the Midwest or the American Midwest, is one of four census regions of the United States Census Bureau. It occupies the northern central part of the United States. [ 1 ] It was officially named the North Central Region by the U.S. Census Bureau until 1984. [ 2 ]