Antarctica has been relatively isolated from the rest of the world for millions of years but these days ships could potentially introduce marine animals and seaweeds. Invasive species can have drastic consequences for ecosystems, for example by taking over areas and creating a new habitat or becoming predators for species with no suitable defenses.
Click here for original story, Antarctica’s unique ecosystem is threatened by invasive species ‘hitchhiking’ on ships
Source: Phys.org