We examined recent faunal changes in freshwater mussels (Unionidae) in northern Ohio. We assessed species diversity in 2 agricultural watersheds, the Vermilion and Huron Rivers, and compared these faunas among 7 neighboring rivers within the Lake Erie watershed that varied in levels of human impact, geological structure, and fish diversity. We found 19 mussel species in each of the Huron and Vermilion Rivers, and 89% of species overlapped between the 2 rivers. Museum records suggested that as many as 4 species might now be missing from each river, and across the 9 tributaries in the region, species loss has been common. The total number of species once present in each river was positively correlated with watershed area, but the size of watersheds no longer provides a significant estimate of mussel or fish diversity. Current mussel faunas also were weakly correlated with the fish species present, suggesting that mussel species ranges have not been limited by a lack of available fish hosts.
You have requested a machine translation of selected content from our databases. This functionality is provided solely for your convenience and is in no way intended to replace human translation. Neither BioOne nor the owners and publishers of the content make, and they explicitly disclaim, any express or implied representations or warranties of any kind, including, without limitation, representations and warranties as to the functionality of the translation feature or the accuracy or completeness of the translations.
Translations are not retained in our system. Your use of this feature and the translations is subject to all use restrictions contained in the Terms and Conditions of Use of the BioOne website.