Field (and Stream) Work (IMAGE) University of Pittsburgh Caption As part of the DEP research, Pitt biology faculty and students conduct field work to determine the total biological scores (TBS) of undermined streams, evaluating conditions including stream flow and species recovery. Approximately eight hours of laboratory work to identify the genus and species of life forms is needed for every one hour of field work. Credit Anthony Iannacchione/University of Pittsburgh 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.