Eutrophication and Dreissena Invasion as Drivers of Biodiversity: A Century of Change in the Mollusc Community of Oneida Lake
A: Gastropod and unionid species richness (bars) and gastropod average density (± standard error, where available) in Lower South Bay in 1917 , 1967 , and 2012 (our study). B: Growing season (May-October) values of total phosphorus, chlorophyll a, and Secchi depth in Oneida Lake from 1927 to 2011, averaged across 5-year periods. Where available, error bars indicate standard deviation of annual growing season averages. Vertical dashed line indicates timing of D. polymorpha invasion. Data from Muenscher , Greeson , and Rudstam .