Researcher and Water Testing (IMAGE) American Society of Agronomy Caption The study looked at microbes' ability to remove nitrogen. Researchers also measured stream depth, temperature, and water chemistry. Credit Jordan Gross and Philippe Vidon. Usage Restrictions Please use with story only 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.