Adelie Penguins (image) University of New Mexico, Long Term Ecological Research (LTER) Network Share Print E-Mail Caption These are Adelie penguins near the Palmer Station LTER site in Antarctica. The local population has declined by 80 percent since 1975 in response to climate change. Credit Zena Cardman Usage Restrictions None Share Print E-Mail Disclaimer: AAAS and EurekAlert! are not responsible for the accuracy of news releases posted to EurekAlert! by contributing institutions or for the use of any information through the EurekAlert system.