B. Papp szerk.: Studia Botanica Hungarica 34. 2003 (Budapest, 2003)

Vasas, Gizella: Investigations on macrofungi production effected by fungistasis at Pilisszentkereszt (Hungary)

Table 3. Fungal production in treated and control sites of the mixed deciduous and spruce forests. Saprotrophic Wood decaying Mycorrhizal Total species fruitbody species fruitbody species fruit body species fruitbody Treated (mixed forest) 31 952 15 279 16 163 62 1394 Control (mixed forest) 23 201 7 74 17 177 47 452 Total 1 153 353 340 70 1846 Treated (spruce forest) 23 784 2 31 14 135 39 600 Control (spruce forest) If! 263 2 13 14 1.24 32 400 Total _ 1047 _ 44 259 39 1300 The number of fruit-bodies is much higher in the genus Agaricus on the treated area (262) compared to the control (83). The number of species is almost the same on both the treated (6) and the control (5) sites. The number of fruit-bodies in genus Collybia is increased strikingly. If the wood decaying Collybia fusipes is omitted from the calculations, 4 species are represented by 273 fruit-bodies, while on the control site 3 species are represented by 51 fruit-bodies. A similar tendency is seen in Clitocybe and Lepista. In the case of Clitocybe, 112 fruit-bodies of 5 species were found on the treated sites, 11 fruit-bodies of 3 species on the control sites. The genus Lepista is characterised by 3 species with 78 individuals on the treated, and 3 species with 15 individuals on the control sites. There is a conspicuous increase in the numbers of species and fruit-bodies of the wood decaying species compared to those of the control quadrates: these became twice as much in the last year of the 3 year period. A total of 15 species with 279 fruit-bodies were found on the treated, and 7 species with 74 fruit-bodies on the control sites. The sampling sites in the spruce forest at the edge of Pilisszentkereszt have already been studied before, when they were sampled monthly from April to November in 1983-1984, and also mycocoenological investigations were carried out (VASAS 1985). As a result of this former research it was found that saprotrophic fungi predominate over mycorrhizal ones in spruce forests. Furthermore, the small-size subdominant species (with mean weight is lower than 1 g) are represented with higher numbers than those of the eudominant species (with mean weight usually higher than 10 g). Among the subdominant species the tiny saprotrophic species predominated over the mycorrhizal ones. This could be explained by the higher amount of resin-containing litter, which was decomposed by the subdominant saprotrophic fungi and other, litter decomposer organisms. During our investigations carried out in the spruce forest in 2001-2002 it was established that numbers of saprotrophic species and their fruit-bodies are still