. Critical trends in Illinois ecosystems. Ecological assessment (Biology); Environmental impact analysis; Nature; Pollution; Conservation of natural resources; Environmental quality. â A Cropland () W B Grassland () â C Upland forest () â D Urban/built-up () â E Bottomland forest () D F Non-forested wetlands () D G Water () Figure 33- Siigar-Peccitonicci rivers basin land cover Plant and animal life Thirt)'-three percent (850) of the state's native plant species occur in the area. Of these, 26 are state endangered (the eastern prairie fringed orchid is also federa
. Critical trends in Illinois ecosystems. Ecological assessment (Biology); Environmental impact analysis; Nature; Pollution; Conservation of natural resources; Environmental quality. â A Cropland () W B Grassland () â C Upland forest () â D Urban/built-up () â E Bottomland forest () D F Non-forested wetlands () D G Water () Figure 33- Siigar-Peccitonicci rivers basin land cover Plant and animal life Thirt)'-three percent (850) of the state's native plant species occur in the area. Of these, 26 are state endangered (the eastern prairie fringed orchid is also federally threatened) and six are state threat- ened. Most of these rare species occur in the prairie and wetland communities, particularly the sand communities in the Sugar River drainage and the wetland habitats associated with the bog area in the Raccoon Creek drainage. At least 261 of the 299 bird species that regu- larly occur in the state can be found here. Because of the geographical position of the area and the rather diverse array of habitats, several species of birds either reach or are near the northern ( yellow-throated warbler, white' of activities. Threats Agriculture and urbanization ha\e changed the mosaic of forests, wetlands, savannas, and prairies that existed before European settlement. A few of the resulting ecological threats: Habitat loss - Ver)' few natural communities remain in the area. For example, in 1820 wetlands covered as much as 6% of Ste|^henson Cx)unt\ and 1 i'% of Winnebago Clounty. Onl> ;.. of the area remains in wetland today. Furthermore, only of the total area remains as high-qualit>' habitat, which is even more severe than the statewide level of Habitat fragmentation â Ihe lack of habitat leads to several other common ecological problems, particularly habitat fragmentation. Habitat fragnientation interrupts biological. The state threatened river otter IMS been observed here, and five T&E species of fish
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Keywords: ., bookauthorillinoisnaturalhistorysurveydivisi, booksubjectnature
