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<DIV>Are we surprised that disturbance by exotic herbivores favors exotic plants in many cases? The native (North American) plants evolved without challenges from and adaptations to these herbivores. The exotic plants - in many cases - evolved with these same herbivores.</DIV>
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<DIV>I have not been able to read the full article, so I can only guess which herbivores they are testing. But if it is cattle, goats, sheep, or rabbits - have not all been shown to cause severe damage to the native vegetation of previously isolated systems?</DIV>
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<DIV>Faith T. Campbell</DIV></BODY></HTML>