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Old 10-11-2013, 08:08 AM   #1
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Default Research shows river dredging reduced fish numbers, diversity

Research shows river dredging reduced fish numbers, diversity
Penn State
June 7, 2013

http://news.psu.edu/story/278878/2013/06/07/research/research-shows-river-dredging-reduced-fish-numbers-diversity
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Comparing dredged and undredged sections of the Allegheny River, reduced populations of fish and less variety of aquatic life occurred in areas where gravel extraction took place, according to researchers in Penn State's College of Agricultural Sciences.

The researchers investigated navigation pools 7 and 8 near Kittanning and Templeton, and published their results in the journal Freshwater Biology.

"Understanding and untangling the complex effects of human activities on aquatic ecosystems present a challenge to ecologists and resource managers," said lead investigator Jonathan Freedman. "While the physical impacts of dredging have been relatively well studied, less is known about the ecological impacts, particularly on...
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