Sky Islands (VIDEO) Smithsonian Tropical Research Institute This video is under embargo. Please login to access this video. Caption As temperature fluctuates, the area of unique paramo vegetation surrounding a mountain gradually shifts up and down. By using fossil pollen to track the paramos over a million years, researchers show that paramos today are threatened by rising temperatures. Credit Catalina Giraldo Usage Restrictions None License Licensed content 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.