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> If they swam there, no. Invasive species have to be introduced by humans, by definition! So what do you call it if humans introduce a species to an island A
by derefr 2y ago
> If they swam there, no. Invasive species have to be introduced by humans, by definition!
So what do you call it if humans introduce a species to an island A that's really close to another island B — and then the species happens to make the short hop to island B on its own? In a causal sense, that species would not have made it to island B if not for us introducing it to island A.
- tempestn 2y agoYes, when an invasive species spreads from where it was first introduced, it remains an invasive species.
- karaterobot 2y agoThe article says they probably swam across the Johnstone Straight, from the mainland. There's no mention whatsoever of introducing grizzlies to any nearby island. If you're asking hypothetically, I'd guess it comes down to whether the islands were separate ecosystems, but Wikipedia would be a much better source than me.