High CO<sub>2</sub> Experiments (IMAGE) University of California - San Diego Caption Lead author Jeff McQuaid watches an array of pumps designed to test the effects of high CO<sub>2</sub> on Ross Sea phytoplankton in Antarctica. Several recent studies have noted that high CO<sub>2</sub> has a negative effect on phytoplankton growing in low iron environments like the Southern Ocean Credit A.E. Allen 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.