2026 Ecosystem Transformation 9 (4), 60-73

A swampy forest as a refugium for Orchidaceae Juss. in the suburban zone of Tyumen (Western Siberia)

Kazantseva M.N. 

This article presents the results of the survey (August 2024) of a swampy pine forest in the suburban zone of Tyumen (Western Siberia, Russia). High species richness of the phytocenosis and the presence of eight orchid species, four of which are rare and listed in the Red Data Books of various ranks, have been identified. Two species, Hemipilia cucullata (L.) Y. Tang, H. Peng & T. Yukawa and Platanthera bifolia (L.) Rich., form large cenopopulations numbering over 200 and 100 individuals, respectively. Analysis of the ontogenetic structure suggests that cenopopulations of these species are stable and have a good reproductive potential. They are not inferior in these indicators to populations developing under automorphic conditions of a green moss pine forest. Vitality of cenopopulations of both species corresponds to the category "flourishing". Unlike P. bifolia, H. cucullata demonstrates higher vitality in the swampy stands compared to dry habitats. These data point up the value of swampy forests for maintaining rich biodiversity in the rapidly developing suburban area of Tyumen and make it
possible to consider them as refugia for rare orchid species.

M. N. Kazantseva
Institute of the Problems of Northern Development, Tyumen Scientific Center, Siberian Branch of the Russian Academy of Sciences
Chervishevsky Trakt St. 13, Tyumen, 625008 Russia

mnkazantseva@yandex.ru

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