Fig. 2 (IMAGE) CNRS Caption Left: Phytoplankton (nitrogen-fixing Trichodesmium cyanobacteria) bloom in the south-west Pacific. (© G. Roudaut) Right: Micrograph of Trichodesmium, which traps molecular nitrogen (N2) using the iron abundantly available in its environment. (© S. Bonnet) Credit © G. Roudaut © S. Bonnet 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.