. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Forests • 37 Figure 5-3 Composition of Illinois Commercial Forests 1962 and 1985 Oak-Hickory Maple-Beech Elm-Ash-Sofl Maple Oak-Gum-Cypress Oak-Pine Loblolly, Shortleaf Pine White, Red, Jack Pine. 1962 1985 1000 2000 Acres x 1000 Source: Ecological Resources, Illinois Natural Histor\' Surve\', 1^J^4 for at least part of their lifecycles; in all, the woods are home to more than 420 birds and other vert
. The Changing Illinois environment : critical trends : summary report of the Critical Trends Assessment Project. Man; Pollution; Environmental protection; Ecology; Environmental impact analysis. Forests • 37 Figure 5-3 Composition of Illinois Commercial Forests 1962 and 1985 Oak-Hickory Maple-Beech Elm-Ash-Sofl Maple Oak-Gum-Cypress Oak-Pine Loblolly, Shortleaf Pine White, Red, Jack Pine. 1962 1985 1000 2000 Acres x 1000 Source: Ecological Resources, Illinois Natural Histor\' Surve\', 1^J^4 for at least part of their lifecycles; in all, the woods are home to more than 420 birds and other vertebrates. The gradual loss of biological diversity observed in Illinois forests in recent decades is reflected in the adaptation to—one could almost say appropriation of—the forest by adaptable, "generalist" plant and animal species such as starlings and brown-headed cowhirds. (Some generalist animals of the forest, such as opossum and raccoon, have made themselves at home in towns and villages, too, as have woodland birds like the blue jay.) Forest edges are rich habitats for plants and animals like deer able to exploit them, but they leave the forest itself vulnerable to aggressive weeds, non-native animal competitors for nest sites and food, and predators. Hunters surveyed in 1991 reported seeing half as many housecats as raccoons in woods in most regions of the state. Mammals. Many commercially important furbearers dwell mainly or exclusively in forests, including the red and gray foxes, coyote, and raccoon. A 1991 survey of hunter sightings found that the red fox was more common in the north, the coyote and the bad- ger in the south. Although small rodents are numerically dominant, squirrels and deer are the most conspicuous among mammals in Illinois woods. Their large numbers are less a matter of these species adapting to the Illinois environment as the Illinois environment having been modified—inadvertently—for them. Fox squirrels prefer mature oak-hic
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