Additional files [RJEE Vol. 9 (4). 2024 – 1]

• Fig. 1. Study area (A, red square) and study sites (B, red circles) in the Southern part of the Kaluzhskie Zaseki Reserve: 1 – old-growth forest with insolated windthrows and Quercus robur individuals more than 300 years old on Phaozems and Retisols (Trud); 2 – mass windthrow of 2006 in broadleaved forest (75 years old) on Retisols (Nagaya); 3 – mass windthrow of 2006 in broadleaved forest (100 years old) on Podzols (Yagodnoe). Black spots are forest stands fallen during the mass windthrow in 2006 [27]
• Fig. 2. Vegetation at the study sites: A and B are single windthrows in the old-growth broad-leaved forest on Phaozem and Retisol (Trud), C and D are the mass windthrows of 2006 on Podzol (Yagodnaya) and Retisol (Nagaya) in 2020 and 2021
• Fig. 3. Soil sampling locations: A and B under Quercus robur deadwood in the old-growth forest on Phaozem and Retisol; C and D under Acer platanoides and Picea abies deadwood on Retisol in Nagaya; E and F under Acer platanoides and Picea abies deadwood on Podzol
• Fig. 4. Representations of the four examined soil variants plotted by mean values of each fraction (A) and 68 soil samples (B) in the texture triangle. Soil calculator developed by Agricultural Technology Centre Pvt. Ltd. (https://agritechcenter.com.np/soil-calculator.html) (A) and Jules Blom (https://www.ternaryplot.com) (B) were used to construct the figures
• Fig. 6. Boxplots of texture classes (sand, silt, and clay) for loams (A) and sands (B) distributed by soil variants and microsites: 1 and 2 – PH_T near and under the log; 3 and 4 – RT_N near and under the log; 5 and 6 – RT_T near and under the log; 7 and 8 – PZ_Y near and under the log