At the Kamenný rybník locality, it was possible to palynologically detect a significant settlement in the Mesolithic period with such a degree of deforestation that was not recorded throughout prehistoric times. Although according to archaeological evidence, it seems that the settlement could have been denser, palynological research did not confirm this (Hůrka bog, Merklín, Kamenný rybník). Poor sandy soils and peaty biotops were not attractive for settlement. Today's nutrient- and species-poor pine-oak forests developed in dependence on human settlement. The relict taiga, which would have persisted since the last Ice Age, was not confirmed in the case of the Pilsen Basin.