Filters: Tags: CentralMidwestRegion (X) > partyWithName: Pam L Fuller (X)
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The Crystal Darter (Crystallaria asprella) requires large, clear-water streams with clean sand and gravel bottoms and moderate to swift currents. It is intolerant of siltation and other forms of pollution from various land use practices. Direct habitat degradation from damming, channelization, and dredging has also reduced habitat for this species. Remaining populations have become isolated from one another by dams and impoundments. The Mississippi River most likely no longer serves as a usable corridor for the Crystal Darter because of the silt load. The isolated local populations are then vulnerable to single destructive events such as toxic chemical spills.
The Greater Redhorse (Moxostoma valenciennesi) is sensitive to habitat changes, particularly excessive siltation, and pollution. Other threats include river channelization, alterations to flow regimes, dam construction, and removal of riverside vegetation. Barriers are especially problematic as this is a wide-ranging species that has different flow and habitat requirements for different stages of development.
The Northern Madtom (Noturus stigmosus) is a small member of the catfish family that requires fast currents and complex rocky habitat. It faces a host of habitat threats including competition with invasive species, climate change, siltation, loss of habitat, excessive turbidity, and poor water quality. Channelization of small streams in this region is a significant threat to this species.
The Ohio River flows through or borders six States and is 981 miles (1,579 kilometers) long, starting at the confluence of the Allegheny and Monongahela Rivers in Pittsburgh, Pennsylvania, and ending in Cairo, Illinois, where it flows into the Mississippi River. At the confluence, the Ohio River is considerably bigger than the Mississippi River. More than 25 million people, almost 10 percent of the U.S. population, live in the Ohio River Basin, and it is source of drinking water for more than 3 million people even though many sections do not meet water quality standards for bacteria and pathogens, PCBs, lead, mercury, metals, organics, and other pollutants. There are 20 dams on the Ohio River that are managed by...
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