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Long-term dynamics of dreissenid mussels and their ecosystem effects

Alexander Karatayev, Vadim Karatayev, Lars Rudstam, Lyuba Burlakova, Kristen Holeck, Christopher Hotaling, Randy Jackson, Amy Hetherington, Boris Adamovich, Hanna Zhukava

Following a workshop at CBFS in 2017, we have continued to analyze long-term data on mussels and ecosystems in six polymictic lakes, three in Belarus (the Naroch system lakes), two in the Netherlands, and Oneida Lake.  These six lakes may have the longest data sets documenting mussel effects on the ecosystem and the time scale of these changes.  Mussel effects declined with time in all lakes, which suggest that systems are resilient to change over time periods of decades.  However, in Oneida Lake, the arrival of quagga mussels increased the biomass of mussels in the lake and we have documented further declines in Daphnia abundance and chlorophyll concentrations, especially in early spring and late fall.  Analyses continued and was augmented by theoretical ecologist Vadim Karatayev joining the group in 2021.  A manuscript was submitted and is now in revision.