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Researchers say WV fish population down from mountaintop mining

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According to new research conducted by the U.S. Geological Survey, Appalachian streams impacted by mountaintop mining have less than half as many fish species in them.

Mountaintop mining is a type of surface mining used to extract coal in Appalachia by moving surface layers of soil and rock into adjacent valleys, creating “valley fills.”

According to a press release from USGS, researchers used data from several time periods to track changes in fish diversity and abundance in the Guyandotte River basin which spans from Huntington to the lower part of the Mountain State. The research has showed there are about a third as many fish than in non-impacted streams.

“The Appalachian Mountains are a global hotspot for freshwater fish diversity,” said Nathaniel Hitt, a USGS research fish biologist and lead author of the study. “Our paper provides some of the first peer-reviewed research to understand how fish communities respond to mountaintop mining in these biologically diverse headwater streams.”

Original fish data collected by a team from Pennsylvania State University between 1999-2001, and USGS collected additional data from 2010-2011.

Read the entire study HERE.

Hitt, along with USGS biologist and co-author Douglas Chambers, found no evidence fish communities have recovered over time, and instead observed persistent effects of mountaintop mining associated with water quality degradation.

Prior research has linked water quality deterioration from mountaintop mining to the degradation of stream insect communities. The new USGS paper is the first to evaluate this issue for stream fish communities.

“Our results indicate that headwater mining may be limiting fish communities by restricting the prey base available for fish,” said Hitt. “For instance, fish species with specialized diets of stream insects were more likely to be lost from the streams over time than fish species with more diverse diets.”

Results of the new study indicated that water quality was generally more important than physical habitat for the observed fish community changes. The authors found elevated selenium and conductivity levels where fish community degradation was observed but saw no significant differences in physical habitat availability.