Sofronova E.V.1 2019. Liverworts of the mountain tundra belt of the North-East Yakutia // Arctoa. Vol. 28: 210–217 [in English].
1 – Institute for Biological Problems of Cryolithozone SB RAS, Lenina str. 41, Yakutsk, 677980 Russia; e-mail: email@example.com
KEYWORDS: flora, liverworts, ecology, glacial and cryogenic shapes of relief, mountain systems of Verkhoyansk and Chersky, Yakutia
ABSTRACT. The materials collected during several expeditions in the mountains of NE Yakutia are summarized; they include the data on species composition, distribution of liverworts in mountain tundra belt in North-Eastern Yakutia and their ecology. In total, 111 liverwort species were revealed; 15 of them are known within Yakutia only here. Apotreubia hortoniae, Diplophyllum albicans, Frullania ignatovii, Gymnomitrion brevissimum, G. commutatum, Herbertus aduncus, Isopaches alboviridis, Marsupella arctica, M. boeckii, and Pleurocladula albescens are found in Yakutia in 1–3 localities. Presence in mountain ranges, habitats and substrates (most frequent ones are highlighted), presence of gametangia, sporophytes and brood bodies, and most frequent associated species are given for each species. Liverwort species with sound role in vegetation of mountain tundra are revealed. Liverworts preferably inhabit places where competition with mosses and vascular plants is low; however, they avoid unstable substrates. The highest liverwort diversity was observed along mountain brooks with slow current, while the lowest number of species was revealed on rock-fields, solifluction slopes, and near late snowfields. The high species number was found on frost medallions and in pools in bogs.