COLUMN: Invasive species’ abundance similar at native and introduced sites

Many land managers know firsthand the damage invasive species can do to natural resources, but no one knows exactly why these species are able to out compete native plants.

This is not just a Kentucky problem, as invasive species are common throughout the world. A long-held theory, developed by biologists, hypothesizes that invasive plants are more numerous in introduced sites compared to their native, or home, range, because an ecological change occurs during their invasion that gives them an advantage over native plants. This theory is known as the abundance assumption.

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