Penguin species in the Antarctic that once benefited from rising temperatures are now in decline due to warming gone too far, scientists said Thursday. Previous scientific research was unable to determine why populations of Adelie and chinstrap penguins are in decline, while gentoo penguins are increasing in numbers. n the new study, biologists said that all three species expanded after the last Ice Age ended around 11,000 years ago, but rising temperatures being seen today are threatening their food supply. “There was less ice around Antarctica, which was good for these penguins, as it opened up new breeding habitats,” Gemma Clucas of the University of Southampton’s Ocean and Earth Sciences department said.

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