Posted by Damien on Wednesday, July 15, 2009 at 11:33am.
It's pretty good.
I'd make a couple of changes, though.
Invasive species are just one of many things that can disrupt and drastically change an ecosystem. They are non-native organisms, whose introduction is likely to cause harm to the economy, the environment and its inhabitants.
Note the words I deleted.
I would not reword it, but quote it (and cite the quote). Otherwise, your rewording is ok.
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