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Environment of Iowa : ウィキペディア英語版 | Environment of Iowa The ecology of the state of Iowa has been heavily affected by agricultural production, but remaining natural areas reflect a wide varieties of environmental niches. ==Ecology and biota== Iowa's natural vegetation is tallgrass prairie and savanna in upland areas, with dense forest and wetlands in floodplains and protected river valleys, and pothole wetlands in northern prairie areas.〔Prior, Jean C. (1991) ''Landforms of Iowa.'' University of Iowa Press, Iowa City.〕 Most of Iowa is used for agriculture, crops cover 60% of the state, grasslands (mostly pasture and hay with some prairie and wetland) cover 30%, and forests cover 7%; urban areas and water cover another 1% each.〔Iowa DNR: Iowa's Statewide Land Cover Inventory, http://www.igsb.uiowa.edu/Browse/landcvr/landcvr.htm〕
抄文引用元・出典: フリー百科事典『 ウィキペディア(Wikipedia)』 ■ウィキペディアで「Environment of Iowa」の詳細全文を読む
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