Since 1975 we have been monitoring the biodiversity of macromycetes by a stationary method in the Perm Krai southern taiga subzone. No alien fungi have been found naturally. However, 15 species of fungi have been found in the Perm Krai that could be caused by: 1) specific habitat conditions (greenhouses — fungi of the genus Leucocoprinus Pat.); 2) cultivated plant species of the genera Populus L., Salix L. and related genera Tricholoma populinum J.E. Lange, Pluteus aurantiorugosus (Trog) Sacc., Volvariella bombycine (Schaeff.) Singer, Pholiota populnea (Pers.) Kuyper & Tjall.-Beuk., Laetiporus sulphureus (Bull.) Murrill and Cerioporus squamosus (Fr.) Quél.; 3) climate warming at large over the past few years; these are unusual species Mycenastrum corium (Guers.) Desv., Mutinus ravenelii (Berk.) E. Fisch. and local thermophilic fungi Phallus impudicus L., Suillellus luridus (Schaeff.) Murrill and Volvariella surrecta (Knapp) Singer. In general, alien fungi are not a threat to indigenous mycobiota. More likely, they are temporary and can become dormant again.

L.G. Perevedentseva, T.A. Shafranova, N.D. Tatarinov