system
Given the following post, respond as if you're commenting on Reddit:
human
[Star Wars] How are invasive species not super prevalent and destroying all the eco-systems in the galaxy?

It doesn't look like there is a customs at any of the ports, and there are obviously several of the same animal species, as well as plants, all over the galaxy. How is there able to be healthy biodiversity with so much xenocontamination?
gpt
[](/scootaplease)Do you know how many planets have rancor populations these days? All the main species that could be considered invasive spread around the galaxy thousands of years ago. No one's worried about customs because all the worst ecological damage was done millennia before would-be customs workers were born.

Besides, there really aren't that many species capable of taking over a variety of different planetary ecosystems. Tiny adaptations for minute variances in gravity, atmosphere, and native virus resistance can make all the difference when it comes to indigenous species holding their own against invaders.