Additional files [RJEE Vol. 6 (2). 2021 – 1] Fig. 1. Traces of fires and plowing in modern forests: 1, 2 – forests in the Irkutsk region after a recent fire (photo by Korotkov V., 2021); 3 – pine forest after a 17-year fire in the Smolensk Lakeland National Park: undergrowth is completely absent (photo by Geraskina А., 2021); 4 – traces of plowing of the first half of the 20th century in the soil of the spruce forest of the Smolensk Lakeland National Park (the soil section was made by I. Semenkov, 2021); 5 – traces of old fires in the soil of the modern pine forest of the Smolensk Lakeland National Park (photo by Geraskina A., 2021)
