- 1―(upper) tree layer, 2―lower tree layer, 4―shrub layer, 6―herb layer. In the table, there are dominant tree species (burned/in red/and living/in green/) as well as diagnostic species for crown fire plots /in violet/, diagnostic species for all burned plots (crown and ground fire)/in blue/, diagnostic species that support a certain degree of fire (appearing in unburned and in plots damaged by ground fire) /in yellow/, and the most common species in the whole dataset /in black/