Boreal Floodplain (IMAGE) University of Washington Caption Sedges and willow trees get the nitrogen they need from cyanobacteria living in the sediments of pristine boreal floodplains found at 60 degrees latitude and north into the Arctic Circle. Credit T DeLuca/U of Washington Usage Restrictions Credit required 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.