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Old 06-20-2014, 02:16 PM   #1
A Bee's Best Friend
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Join Date: Mar 2009
Location: Chicago Illinois USA
Default Eels, mussels, water quality, oh my.

Historically, eels were abundant in estuaries and freshwater tributaries in much of the eastern U.S. and Canada. The construction of dams changed all this, drastically limiting eel migration routes from the ocean to upstream freshwater areas.
In the case of the American eel, the population decline has an important and fascinating connection to certain native freshwater mussel species. Larval mussels need to attach to the gills of a fish in order to complete their life cycle. Some mussel species specifically need American eels to survive.
Fewer mussels means poorer water quality because mussels have the ability to filter gallons of water a day.
"Half Earth Quest" Edward O. Wilson
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