Twenty indicator species were identified for plots in which P. serotina had lower mean indicator values for soil moisture, reaction (pH) and nitrogen, compared to plots without P. Site conditions were also expressed indirectly for 210 sample plots using Ellenberg indicator values (soil nutrients, acidity, moisture, light conditions). Environmental variables measured in 34 sample plots were slope, aspect, litter depth, soil type, pH, soil compaction, soil moisture, air humidity, soil temperature and light intensity in spring and late summer. The major emphasis in this study was the determination of factors controlling the abundance of P. The relation between invasion success of Prunus serotina and type of recipient habitat was studied in a large forest in central Belgium.
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