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In Our Own Backyard - Chapter 7 Extract

ThistleNot all non-native (also termed non-indigenous, or exotic) plants and animals introduced into our environment present a direct threat to our native communities. For example, many plants are unable to reproduce vigorously enough to be a threat. It is only those that become aggressive or have no enemies to control their spread that are commonly termed "invasive."

LoostrifeInvasive plants out-compete the native plants for moisture, nutrients and sunlight and typically offer little shelter or food to native wildlife. As they propagate, invasive plants crowd out other species and turn complex plant communities into mono-cultures. This affects the entire food chain, because reduction in plant variety leads to a reduction in the varieties of animals and insects that the land can support. Similarly, invasive animals, without substantial threat from predators, may consume both native vegetation and beneficial native animal species, completing the circle of destruction.

GypsyMoth Larva[In Our Own Backyard has sections on identifying and control of invasive plants, insects and animals.]

© Riverwoods Preservation Council- - Page last updated: December 2009