- Joined
- Apr 4, 2004
- Messages
- 1,503
Yeah, pretty much a colony. Now, maybe given enough time they could spread, but I'm not even sure they could be qualified as invasive even at that, in the accepted definition of the term. A spider could be an invader, but generally I think "invasive" is defined by rapid spread with a detrimental effect in the environment. I think there are non natives that have established themselves here that merely established themselves without much in the way of negative impact. I'm not a biologist, but would think that things such as a rapidly expanding population, competing with native species, agricultural impact, threat to humans, vectors for disease and probably many more pieces of criteria would be involved in categorizing a species as an invasive species of concern. On the other hand, the example of B. vagans must not be that big of a concern because I'd think we'd have heard more about measures taken to eradicate them.