Rare Ferns of the Amur Region (Russia)

Irina Ivanovna Gureyeva¹, Irina Anatolievna Kreshchenok² and Alexander Alexandrovich Kuznetsov³

¹National Research Tomsk State University, Laboratory of Biodiversity and Ecology, prospekt Lenina, 36; 634050, Tomsk, Russia. ²Amur Branch of Botanical Garden-Institute, Far East Branch, Russian Academy of Sciences, Laboratory of Introduction Russia, 2-km of Ignatevskaya line; 675000, Blagoveshchensk, Russia. ³National Research Tomsk State University, Laboratory of Biogeochemical and of Remote Methods of Monitoring Environmental, prospekt Lenina, 36; 634050, Tomsk, Russia.

DOI : http://dx.doi.org/10.13005/bbra/1474

ABSTRACT: Rare fern species of Amur region are identified. These ferns have unstable positions in plant communities and need in conservation. The reasons for their rarity and limitative factors are identified. 21 fern species are rare on the Amur region territory, 10 fern species among them are known only from one location. The most endangered species are Leptolepidium kuhnii (Milde) Hsing et S.K. Wu, Protowoodsia manchuriensis (Hook.) Ching and A. tenuicaule Hayata. Most of rare ferns grow as isolated individuals, they have difficulties in spore and vegetative reproduction. Both Khingan and Zeya State Reserves are the territories of concentration of rare ferns: 8 and 6 rare ferns respectively inhabit here. Some approaches to conservation of rare species are suggested.

KEYWORDS: Ferns; Rare species; Distribution; Amur region

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