Alien invaders: intimidate Antarctic fringes

Scientists found that the fringes of Antarctica are being invaded by alien plants and minute animals. Foreign plants previously grow on the fast-warming Antarctic Peninsula. The research team believes that the Antarctic Peninsula and some other areas around the continent's coast could see similar changes in decades to come. Many islands in the sub-Antarctic region have seen significant ecological changes due to invasive species that have either arrived accidentally or deliberately.

 The marine environment is altering too, with giant crabs establishing themselves in waters that were formerly too cold. The glacial Peninsula, which runs up towards the southern tip of South America, has warmed by about 3C over half a century, much faster than the global standard. The researchers establish that though many of the seeds originated in South America, a large number came from the Northern Hemisphere.

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