River bacteria research. Soil scientist taking water samples from a stream to test levels of E. coli (Escherichia coli) released from the disturbed bo

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River bacteria research. Soil scientist taking water samples from a stream to test levels of E. coli (Escherichia coli) released from the disturbed bottom sediments during heavy rain. Water flow was increased by discharging water from a truck (background) into the stream at a rate and volume that replicated conditions caused by heavy rain. Photographed at Beaverdam Creek, Pennsylvania, USA.

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Size: 2480px × 3521px
Photo credit: © STEPHEN AUSMUS/US DEPARTMENT OF AGRICULTURE/SCIENCE PHOTO LIBRARY / Alamy / Afripics
License: Licensed
Model Released: No

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