Mycobiota of the Maksimjarvi Planned Protected Area (Republic of Karelia, Russia)

This paper is a first report on the results of macrofungi studies in the planned protected area (PPA) Maksimjarvi, situated in the middle part of the Republic of Karelia, near the Finnish border. The forests there are predominantly north-boreal pine stands with a smaller proportion of spruce stands. The data were gathered during the fieldwork carried out in 2022 by O. Predtechenskaya and A. Ruokolainen and combined with data from Finnish colleagues carried out in 2012 and 2016. The records are supported by specimens deposited in the herbarium of the Karelian Research Centre RAS (PTZ) and Botanical Museum of the University of Helsinki (H). The current checklist for the Maksimjarvi territory includes 196 species of 121 genera, 57 families, 14 orders of aphyllophoroid, agaricoid and gasteroid fungi. The records include the first finding of Phellodon secretus in the Republic of Karelia, and 3 fungal species (Botryobasidium laeve, Peniophora septentrionalis, Phellodon secretus) were found for the first time in the biogeographic province Karelia pomorica occidentalis. Surveys of the Maksimjarvi PPA revealed 17 fungal species listed in the Red Data Book of the Republic of Karelia (2020). The area is known to harbor indicator and specialized fungal species of biologically valuable forests. The need to designate it as a conservation area is substantiated with regard to the ongoing formation of the PA system of the Green Belt of Fennoscandia and the Republic of Karelia.