Table 4 Comparisons of plant species composition between the forest age classes (class 1: 5–10-year-old forest stands with mature forest patches, class 2: 40–45-year-old forests, class 3: 60–65-year-old forests, and class 4: more than 90-year-old forests) with one-way analysis of similarities (ANOSIM) in the dolines of the Mecsek Mts (Hungary)