Alaskan Rivers: DOC Concentrations (image) Woods Hole Research Center Caption DOC concentration and percent loss of DOC after three months of incubation at 20 degrees C in the dark. Parenthetical values show loss with nutrient amendment. In general, DOC lability was high (20-40 percent) during the freshet period and declined greatly during summer low flow conditions. Credit R. M. Holmes, Woods Hole Research Center Usage Restrictions None 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.