joanna-blaszczak-installing-sensors (IMAGE) University of Nevada, Reno Caption High-frequency sensors deployed in streams, such as those being installed by Joanna Blaszczak in a stream in Montana, can provide continuous data that captures night-time hypoxic conditions. Credit Photo by Malgosia 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.