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 | |
Lizenzart: | Lizenzpflichtig |
Credit: | Science Photo Library / Ausmus, Stephen / US Department of Agriculture |
Bildgröße: | 2480 px × 3521 px |
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