After a wildfire tore through the forest around Kakisa, N.W.T., in 2014, Lloyd Chicot began noticing changes in the lake: the pickerel grew fatter, and the pelicans moved in. Chicot, the chief of Ka'a'gee Tu First Nation, attributes the change partly to climate change and partly to runoff from the fire, which brought nutrients and debris into the lake. "Right after the fire, there was a lot of burnt driftwood and that kind of stuff," he recalled.