Research led by Kathleen Laird (Biology) and Brian Cumming (Biology & Environmental Studies) reveals that severe droughts have had profound and negative impacts on the Winnipeg River Drainage Basin. Using within-lake calibration models based on diatom assemblages this work showed a drought coincident with the Medieval Climate Anomaly (c. 900-1400 CE) and another more recent drought coincident with the dust bowl of the 1930s. The study also included Queen's University Biology M.Sc. students Melanie Kingsbury, Susan Ma and Heather Haig, is funded by the Natural Sciences and Engineering Research Council of Canada and Manitoba Hydro. The research was published in the June issue of Global Change Biology.