Corbicula fluminea surveillance on Briggs Lake, Sherburne County

Current known populations of Corbicula fluminea in Minnesota are typically limited to riverine systems where there is thermal discharge from power plant cooling systems or other thermal discharge. The literature and climate modeling suggests that the climate in Minnesota is not suitable for the survival of C. fluminea populations, though the southern part of the state may be suitable under some climate predictions. Specimens of the invasive clam, C. fluminea, were discovered in Briggs Lake (Sherburne County) during Starry Trek, a statewide volunteer search for aquatic invasive species. This was the first time live individuals have been found in an inland Minnesota lake and indicates a need for further evaluation to better understand if overwinter survival is happening outside of areas with thermal discharges in Minnesota.

Researchers plan to survey Briggs Lake for C. fluminea on a monthly basis over the winter months to evaluate overwinter survival of the population present in the lake and engage volunteers/community members in the data collection process. They will continue to survey through the following summer to monitor for potential range expansion and reproduction in Briggs Lake.

Project manager: Megan Weber

Funded by: MAISRC Rapid Response Fund and the University of Minnesota

Project start date: Jan. 2020

Project end date: Dec. 2021