Watershed Stewards (IMAGE) American Society of Agronomy Caption Arizona Master Watershed Steward program participants sample macroinvertebrates in Tonto Creek, Arizona. Credit C. Rupprecht 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.