S. Mahunka szerk.: Folia Entomologica Hungarica 57. (Budapest, 1996)

Fig. 4. Cluster diagram of the oak forest layers in the study sites of Csobánka and Gödöllő. — In the abbreviations the first letters indicate the layers: C = canopy and S = shrub layer; the second letters indicate the forest types: M = mixed forest, P = pure forest, Y = young forest; the third letters indicate the study sites: C = Csobánka, G = Gödöllő communities in the shrub layer of the pure and mixed oak forests was completely different. The difference between the diversity indices of communities in the shrub layers of the pure oak forest (H = 2.472) and mixed oak forest (H = 2.494) was not significant at Csobánka, but was perceptible between the braconid communities of the shrub layers of the pure oak forest (H = 2.14) and the mixed oak forest (H = 1.847) at Gödöllő (Fig. 3/F3) Kendall's rank correlation analysis found significant correlation between the braconid communities of the same forest layers of the different forest types, and between the different forest layers of the same forest types (Table 2). The cluster analysis confirmed the results of the rank correlation. The analysis revealed groups in the braconid communities according to the same layers of the different forest types in the different study sites and the different layers of the same forest type. The cluster analysis also revealed that one part of braconid communities in the pure oak forest stands (Csobánka) is similar to the communities in the mixed oak forest stands, the other part of communities in the pure oak forest stands (Gödöllő) is similar to the communities in the young oak forest stands (Fig. 4).