. Critical trends in Illinois ecosystems. Ecological assessment (Biology); Environmental impact analysis; Nature; Pollution; Conservation of natural resources; Environmental quality. 84 Critical Trends in Illinois Ecosystems Basin acreage - 785,821 acres State land* - 20,070 acres Total natural areas - 7,177 acres High quality natural areas - 1, acres Nature preserves - 854 acres â Does not include natural areas or nature preserves that may be state owned. About 60% of the land in and around the Sinkliole Plain is used for agriculture of one kind or another. This is less than in Illinois
. Critical trends in Illinois ecosystems. Ecological assessment (Biology); Environmental impact analysis; Nature; Pollution; Conservation of natural resources; Environmental quality. 84 Critical Trends in Illinois Ecosystems Basin acreage - 785,821 acres State land* - 20,070 acres Total natural areas - 7,177 acres High quality natural areas - 1, acres Nature preserves - 854 acres â Does not include natural areas or nature preserves that may be state owned. About 60% of the land in and around the Sinkliole Plain is used for agriculture of one kind or another. This is less than in Illinois as a whole, where nearly 78% of the land is region also has proportionately more trees, more wet- lands, and twice as much urban and built-up land than does Illinois on average. Other significant features: ⢠about 44% of the presettlement-quality flood- plain forest still standing in Illinois is found in the region, as is more than a tliird of all south- ern flatwoods (in the Marissa Woods Nature Preserve in St. Clair County) and about 43% of the high-quality limestone glades; ⢠two watercourses have been recognized as Biologically Significant Streams â a tributary to Horse Creek in Monroe County and a six- mile stretch of the Mississippi River in Randolph County; ⢠nearly half of Illinois' surviving loess hill prairie is here and the 532-acre Fults Hill Prairie Nature Preserve in the Mississippi bluffs of Monroe County contains the largest complex of undisturbed prairie of this t)'pe in Illinois; ⢠291,305 acres have been designated a Resource Rich â A Cropland () n B Upland forest () D C Grassland () 13 D Urban/built-up () â E Bottomland forest () D F Water () D G Non-forested wetlands () Plant and animal life The region harbors 75 plant and animal species whose survival is threatened or endangered, includ- ing five species whose survival is at issue not only in Illinois but in the as a whole. The western
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Keywords: ., bookauthorillinoisnaturalhistorysurveydivisi, booksubjectnature
