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Fish DNA in Ozark streams reveals region’s complex geologic history

By David Duvernell, Professor of Biological Sciences, Missouri University of Science and Technology

My students and I encountered a mystery. We were partnering with the Missouri Department of Conservation to monitor for fish presence and abundance in the Missouri Ozarks. We visited half a dozen rivers and streams across the region and collected a few cups of water from each.

We were testing for DNA in the environment to determine which species had left behind their genetic material and were therefore present…

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