I don't know if Toby is trying to reignite the fiery debate on invasive
plants, but I would argue for a more balanced approach to the topic. Saying
that Douglas-fir is not native to Cascadia is to redefine the term. It was
there long before people were, as far as I've ever heard.
Also, making broad generalizations about plant succession is risky, whether invasive plants are involved (usually are) or not. To say that invasive exotic plants do not displace natives without humun disturbance is to deny the chaotic and wondrous process of ecological succession. Natives displace natives, so why can't exotic plants displace natives? I see it frequently, without humun disturbance. Sometimes, native plants displace exotic plants, too. It's all a dance.
Rain
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