> The term "invasive" is poorly defined and often very subjective.
I too read the Wikipedia article and this sentence prompted me to survey a few other places. Federal law in the US for instance.
Your quoted definition doesn't appear in the article covering _invasive_ species, only in "introduced species" which of course implies a human introduced them.
The first paragraph is Wikipedia's definition for invasive species as a kind of introduced species with additional attributes. It's the first sentence in the article.
US federal law might be different, I wouldn't know.
I too read the Wikipedia article and this sentence prompted me to survey a few other places. Federal law in the US for instance.
Your quoted definition doesn't appear in the article covering _invasive_ species, only in "introduced species" which of course implies a human introduced them.