A new Oxford study shows that Antarctic penguins have brought their breeding season forward two weeks in response to climate change.   These changes threaten to disrupt penguins’ access to food and increase interspecies competition. Penguins play a key role in Antarctic food chains, and losing penguin diversity increases the risk of broad ecosystem collapse.   Researchers from Oxford and oxfordbrookes studied three species of penguins over 10 years from 2012 to 2022, specifically their ‘settlement’ at the colony, the first date at which penguins continuously occupied a nesting zone. The three species of penguins studied were the Adélie, Chinstrap and Gentoo, with colony sizes ranging from a dozen to up to hundreds of thousands of nests. They used evidence from 77 time-lapse cameras overlooking 37 colonies in Antarctica and some sub-Antarctic islands.   As lead author Dr Ignacio Juarez Martínez puts it: ‘Our results indicate that there will likely be ‘winners and losers of climate cha...