United States

Alien invasion a threat to Antarctic ecosystem


Photo  / 2

Adelie penguins walk on the ice at Cape Denison in Antarctica, in this December 12, 2009 file photo. Seeds and plants accidentally brought to the pristine frozen continent of Antarctica by tourists and scientists may introduce alien plant species which could threaten the survival of native plants in the finely balanced ecosystem, especially as climate change warms the ice continent, said a report in the Proceedings of the National Academy of Sciences Journal published on March 6, 2012. REUTERS/Paukine Askin/Files