By Douglas Main, OurAmazingPlanet Staff Writer:
Antarctica and its surrounding waters are under pressure from a variety of forces that are already transforming the area, scientists warn.
The most immediate threats are regional warming, ocean acidification and loss of sea ice, all linked to global levels of carbon dioxide. Sea ice cover, crucial to the survival of virtually every animal that lives on and near the continent, already has been reduced by warming, according to a new study published in the July 13 issue of the journal Science. Visits by tourists, researchers and other people also threaten to change Antarctica, as does the harvesting of animals like krill that are key to the Antarctic food chain.
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