Study Finds Steep Decline In Some Antarctic Penguin Colonies

Recent surveys show a significant decline in penguin colonies, with some dropping over 75% in 50 years. Climate change, causing rising ocean temperatures and melting sea ice, is identified as the main cause. This has led to a loss of krill, a primary food source for penguins, particularly affecting chinstrap penguins with a 77% decline since 1971. The data indicates a fundamental change in the ecosystem, impacting the entire food chain.

What significant change has been observed in the ecosystem of the region where penguins live?

In what year was the last survey conducted that recorded the decline in penguin colonies?