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Middle Mississippi Alluvial Plain

Ecoregion in MO, IL

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The Middle Mississippi Alluvial Plain in Missouri is narrow, comprising the Mississippi River alluvial plain between the Missouri and Ohio Rivers. Similar to 72d to the north, this region is a smooth alluvial plain with widespread cropland agriculture and stream channelization. Increased turbidity, current, and volume from the Missouri River contribute to a change in the aquatic biota. In addition, storm water runoff from the St. Louis urban area contributes significant non-point source pollutants to the river.

— EPA

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