In fact, broadleaf deciduous trees like these were becoming the dominant species. Aspen and birch trees take overWhen severe fires in black spruce forests burn deep into the soil organic layer, more carbon is lost during the blaze. After the fires, we established a broad network of research sites in burned black spruce forests across the region. Importantly, wildfire studies indicate deciduous broadleaf forests often burn less easily when a fire ignites, and fires in deciduous forests are more easily put out by rainfall or human efforts. The result is that more deciduous stands across boreal forests are likely to translate into smaller, less severe fires.