Amid calls from some First Nations and municipalities in northeastern Ontario to stop glyphosate spraying on Crown land, environmental groups are raising concerns over the herbicide’s effect on biodiversity. …Wildland fire ecologist Bob Gray said leafy deciduous trees, like aspen, are more resilient to wildfires than softwood conifers like pine and spruce. “Softwoods are highly resinous,” he said. “The foliage and bark is highly flammable. When you’ve got large contiguous areas of conifer forest, you can have large continuous forest fires.” If a timber company’s goal is to promote the growth of softwoods for harvest, at the expense of hardwoods, it can make that area more prone to wildfires. …Jocelyne Laflamme is a Ph.D. candidate at the University of British Columbia found that aspen becomes more flammable in the fall, when they lose their leaves. …In August, forest company Interfor cancelled plans to spray herbicides on trees along the north shore of Lake Huron.