Lake Winnipeg, a prominent freshwater basin in Manitoba, faces numerous environmental challenges such as zebra mussels, microplastics from wastewater, E. coli concerns, and toxic algal blooms visible from space. Amid these well-known issues, a lesser-known aspect gaining attention is the role of viruses infecting microalgae in the lake’s ecosystem.
Prof. Emily Chase, a microbiologist and virologist at the University of Winnipeg, highlights the significance of understanding these overlooked microorganisms. Last summer, Chase initiated research on how viruses impact Lake Winnipeg’s microalgae, essential photosynthetic organisms notorious for forming scummy blue-green films containing harmful neuro-toxins.
Despite their negative reputation, microalgae play a crucial role in the lake’s food web, providing energy for various organisms. However, concerns arise regarding climate change exacerbating the imbalance in Lake Winnipeg’s ecosystem, potentially leading to more toxic algal blooms due to warmer waters and longer summers.
Chase emphasizes the need to comprehend the interplay between viruses, microbes, and climate change to predict future scenarios in Lake Winnipeg accurately. While phosphorus and nitrogen from agricultural runoff and wastewater are recognized culprits in algal bloom formation, the influence of viruses on broader lake dynamics remains less understood.
Drawing on her previous work on algae-virus interactions in the Mediterranean Sea and Lake Erie, Chase aims to shed light on how viruses may contribute to algal bloom collapses. Given the parallels between Lake Erie’s diminishing ice cover and potential impacts on walleye stocks and recreational activities, the research on viruses in Lake Winnipeg becomes crucial for anticipating and mitigating ecological disruptions.
Scott Higgins, a senior research scientist at the International Institute of Sustainable Development, underscores the importance of Chase’s work in filling knowledge gaps and preparing Manitoba for the evolving challenges posed by climate change and viral interactions in Lake Winnipeg. The ongoing research holds promise in providing valuable insights into the intricate relationship between viruses, algae, and environmental changes in the lake.
