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ŠUMARSKI LIST 11-12/2019 str. 60     <-- 60 -->        PDF

method recorded mostly damaging agents requiring management measures, e.g. dead branches (pruning), dead trees (salvage cutting), and Cryphonectria parasitica (Murrill) M.E. Barr (sanitation cutting).
The track length had only a slight positive influence on the duration of the survey (p = 0.01) and the number of management measures proposed (p = 0.56) by the UFMO survey (Fig. 2). However, the proportion of variance explained with the linear model was 31%. A track of 1,000 m in length was surveyed in 108.5 minutes on average, and 39.1 management measures were suggested on average in that area. The length of the track was 138–1,695 m (648 m on average), the number of management measures suggested was 16–85 per track (36.5 on average), and the survey lasted 20–190 minutes (85 minutes on average) per track.
ISM suggested 0–24 (6.7 on average) management measures per plot. The survey of an ISM plot lasted 60–240 minutes (109 minutes on average). Comparing ISM and the UFMO method, the average number of management measures recorded per hour was 3.7 and 25.8, respectively (Fig. 3). However, the proportion of variance explained with the linear model was lower than 36%.
Thirteen and 22 tree species were recorded in the ISM and UFMO methods, respectively (Table 3). Only 12 tree species were the same for both methods. With the ISM method, Pinus sylvestris L., Picea abies (L.) Karst. and Quercus petraea (Matt.) Liebl. were the most frequent, representing 65.9% of all trees surveyed. With the UFMO method, Quercus petraea, Castanea sativa Mill., and Picea abies were the most frequent, representing 74.6% of all trees surveyed. The tree species surveyed by the UFMO method that were not detected by the ISM method represented only 4.5% of all trees: Abies alba Mill., Acer platanoides L., Aesculus hippocastanum L., Fraxinus excelsior L., Juglans regia L., Larix decidua Mill., Larix leptolepis (Siebold & Zucc.) Gordon, Prunus domestica L., Robinia pseudacacia L., and Salix spp. The ISM method recorded one tree species that the UFMO method did not detect: Tilia cordata Mill.
The results of the monitoring also comprised specific management recommendations suggested for the trees per