Researchers from Trent University are immersing themselves in forests and streams in northwestern Ontario to understand how forestry practices and climate change affect brook trout populations and freshwater ecosystems. The team is working in the Walkinshaw and Wolf watersheds, northeast of Thunder Bay. They are focusing on headwater streams, which are small rivers that feed larger waterways across the Great Lakes. “Northern freshwater ecosystems are currently experiencing major disturbances, two of which are forest harvest and climate change. One of the effects of climate change is an increase in water temperatures. And the consequences of these predicted increased temperatures on the stream ecosystem are still unclear,” said PhD student Celeste Milli, who is leading the fieldwork. …Milli said the research could help inform science-based policy decisions in Canada’s northern forests, ensuring that both forest ecosystems and freshwater resources remain resilient in a changing climate.