north-carolina-stream (IMAGE) University of Nevada, Reno Caption Small, low-gradient urban streams, such as the one pictured here in North Carolina, are some of the most susceptible to hypoxia. Credit Photo by Joanna Blaszczak. Usage Restrictions Include name of photographer. License Original 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.