A recent study suggests that the composition of algae in the Great Bear Lake in the Northwest Territories has undergone significant changes due to climate change. The study, published in the Proceedings of the National Academy of Sciences (PNAS) journal, highlights that factors like increased ice-free days and rising air temperatures have led to a rapid restructuring of the algal community in large northern lakes, including Great Bear.
John Smol, a biology professor at Queen’s University and co-director of the Paleoecological Environmental Assessment and Research Lab (PEARL), emphasized the need for further research to understand the implications for the creatures dependent on algae as a food source and the overall food chain. The shift in algae species from those commonly found in ice-covered lakes to those thriving in open water has been observed in Great Bear Lake.
The research team analyzed sediment core samples from various parts of the lake to track environmental changes over different time periods. Comparisons with studies on Lake Hazen and Great Slave Lake in the Northwest Territories revealed surprising alterations in all three lakes despite their considerable size.
While some like Reid Stoyberg, an environmental scientist and fishing guide at Plummer’s Arctic Lodges, have not personally noticed significant trends in the short term, others like Smol stress the importance of ongoing research to monitor the long-term impacts on the ecosystem. As the ecosystem of Great Bear Lake faces changes, the adaptive abilities of its species will be crucial for survival in the evolving environment.