FLORISTIC FINDINGS IN JAPANESE ELM FORESTS AND IN ADJACENT COMMUNITIES IN WESTERN TRANSBAIKALIA
O.A. Anenkhonov1, V.V. Chepinoga2,3, A.P. Sofronov3,4
1Institute of General and Experimental Biology SB RAS, Ulan-Ude,Russia
2Central Siberian Botanical Garden SB RAS, Novosibirsk,Russia
3Irkustk State University, Irkutsk,Russia
4Sochava V.B. Institute of Geography SB RAS, Irkutsk,Russia
Keywords: vascular plants, adventive species, rare and endangered species, new localities, japanese elm forests, Buryatia, Trans-Baikal Territory
Abstract
The biodiversity understanding and conservation require information on the species geography and ecology including a detailed description of spatial distribution and habitat confinedness. The availability of comprehensive data on the distribution of rare and endangered species provides the baseline for combating fragmentation and loss of habitats which is the main reason for the species extinction. Also, to monitor populations of rare and endangered species, detailed data on distribution are crucial. The data on species localities are sufficiently important to control the advent plants dispersal as well. The presented study is supported by 93 relevés and more than 500 herbarium specimens collected in the course of field studies in 2014, 2015, 2018, 2019 in the Republic of Buryatia and Trans-Baikal Territory. As a result of studies, new records of vascular plant species for the Western Trans-Baikal region flora are reported as following. The 25 new localities supported by herbarium specimens and 64 localities documented by relevés for 5 species (Cypripedium macranthon, Circaea lutetiana, Festuca extremiorientalis, Menispermum dauricum, Rhamnus davurica) listed in regional and federal Red Data Books have been described. Also, 11 new localities for 8 rare indigenous species (Artemisia umbrosa, Hieracium narymense, Hylotelephium pallescens, Ribes uva-crispa, Scorzonera glabra, Seseli seseloides, Viola alexandrowiana, V. patrinii) were revealed. The continued expansion of 4 advent plant species (Centaurea scabiosa, Conyza canadensis, Digitaria ischaemum, Trifolium arvense) was supported by newly found 8 localities, 6 of them are documented by herbarium specimens, and 2 localities have been registered in relevés. The suggestion to include Viola alexandrowiana into the Red Data Book of Trans-Baikal Territory is endorsed, and Festuca extremiorientalis is nominated to be listed there too.
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