## 3 Results and Discussion
### Fungal Species in the Investigated Areas  
The complete list of fungal species found at the individual sampling sites is presented in Supplementary Table S1, documenting the high diversity of fungal species in the sampling area. The fungal species found were probably related to the particular soil conditions rather than the pollution level. According to [PERSON] et al. [56], soil pH levels strongly affect the soil bacterial community, with higher diversity in neutral soils than in acidic soils. However, these communities remained unaffected by PAHs. Similarly, it can be expected that the differences in the fungal communities at the individual sampling sites will be more influenced by the various soil conditions, including pH, than due to various PAH pollution levels. Previous investigations indicate that it is possible to predict the fungal capability to degrade, remove, or transform individual POPs. For instance, [PERSON] et al. [32] identified the genera _Ilyonectria_, _Chaetomium_, _Gibberella_, _Paraphoma_, _Schizophrenia_, _Pseudorobillarda_, _Tetracladium_, _Ganoderma_, _Cadophora_, _Exophilata_, _Knufa_, _Mycoleptodiscus_, _Cyphellophora_, _Fusicolla_, _Phallus_, _Devriesia_, _Didymella_, _Plenodomus_, _Pyrenochaetopsis_, _Symbiotaphrina_, _Copriellus_, _Plectosphaerella_, _Septoriella_, and _Hypholoma_ as the most promising PAH-degrading organisms for long-term PAH-polluted soils. Due to the adaptation of these species to already heavily contaminated sites, the suitability of specific taxa found here for mycoremediation by these fungi is high. Fungi accustomed to the locally contaminated soils should have a higher potential for removing contaminants. The phylum Basidiomycota has a presumption of suitability for use in bioremediation [57]; they are capable of degrading hydrocarbons, PAHs, explosives, halogenated hydrocarbons, PCBs, DDT, and PCDD/Fs [58; 59; 60]. The most widespread family of fungi at the sampling sites was Agaraceae. The family included 10 species of fungi found within this study. [PERSON] et al. [61] tested a species of fungus of the same family, _Agaricus bisporus_, which demonstrated an ability to decompose PAHs, which could make this fungus suitable for use in bioremediation. We can speculate that the species _Agaricus sylaticus_, found at one of the most polluted sampling points in this study, could be a suitable candidate to use for PAH degradation. Another promising family from the point of view of mycoremediation is the family Psathyrellaceae, specifically the genus _Coprinopsis_. According to [PERSON] et al. [62], _Coprinopsis cinerea_ degrades PAHs, which could indicate that fungi of the same genus can degrade PAHs. The family Strophariaceae also shows potential uses for bioremediation. Among them, the species _Hypholoma fasciculare_ can degrade pesticides such as diuron, atrazine, and terbuthylazine, as confirmed by [PERSON] et al. [63]. This species occurredat several sampling points in this study, including the most polluted ones, Mine Pavel and Viewpoint, and, therefore, could be tested for its mycoremediation effectivity. Other studies have confirmed the degradation of POPs by the family Strophiaceae; specifically, the species _Agrocybe perfecta_ can degrade pentachlorophenol [64]. The species _Stropharia coronilla_ and _Stropharia rugosomalulata_ can also degrade PAHs [65]. No representatives of this genus were found at the studied locations, but the potential biodegradation effectivity of the Strophiiaceae family deserves further research. According to [PERSON] et al. [66], the genus _Psilocybe_ can decompose pyrene. [PERSON] et al. [67] also confirmed the degradation of hexachlorobenzene by _Psilocybe_ sp. This genus was represented by _Psilocybe sorbica_ var. _arcana_ in this study and was found at the Mine Pavel site, which was the most polluted sampling site. The species _Pluteus cervinus_ of the Pluteaceae family found within this study could also be one of the possible decomposers of POPs.