Botanical JournalBotanical JournalБотанический журнал0006-81362658-6339The Russian Academy of Sciences69085010.31857/S0006813625070069hmclyePROTECTION OF PLANT WORLDОХРАНА РАСТИТЕЛЬНОГО МИРАResearch ArticleRARE SPARSE SPRUCE FORESTS (PICEA OBOVATA) WITH MOSS AND LICHENS: UNIQUE FOREST COMMUNITIES OF THE OKA PLATEAU (EAST SAYAN, BURYATIA)Охрана растительного мираSparse spruce forests (Picea obovata) with moss-lichen bottom layer: The unique woodlands of the Oka plateau (East Sayan, Buryatia)SerebryanyiM. M.СеребряныйМ. М.misha@florin.ruVinogradovA. A.ВиноградовА. А.misha@florin.ruBocharnikovM. V.БочарниковМ. В.misha@florin.ruVoitsekhovskayaS. O.ВойцеховскаяС. О.misha@florin.ruN. V. Tsitsin Main Botanical Garden, Russian Academy of SciencesГлавный ботанический сад им. Н. В. Цицина РАНM.V. Lomonosov Moscow State UniversityМосковский государственный университет имени М. В. Ломоносова150720251107VOL 110, NO7 (2025)ТОМ 110, №7 (2025)71572621092025Copyright ©; 2025, Russian Academy of SciencesCopyright ©; 2025, Российская академия наук2025Russian Academy of SciencesРоссийская академия наукhttps://bioethicsjournal.ru/0006-8136/article/view/690850

In course of field work in the Okinsky District of Buryatia (July 2023), an expedition team from Moscow State University and Main Botanical Garden of the Russian Academy of Sciences discovered and initially examined rare old-growth sparse spruce forests with moss-lichen (Rhytidium rugosum – Cladonia spp.) bottom layer on lavas in the Zhom-Bolok River valley (Oka Plateau, East Sayan). In July 2024, the 2nd expedition revisited and explored the forests in the area in more detail. The paper provides the first collected data on these unique communities (including a complete relevé of one of them). The differences between these communities and lichen/moss-lichen spruce forests from other regions of Russia are discussed in details. The plan to investigate these forest communities and to elaborate measures for their protection is envisaged. The spruce moss-lichen woodlands of the Oka Plateau meet both the IUCN Red List of Ecosystems and the Russian regional criteria for rare and endangered ecosystems.

В июле 2023 г. экспедиция в составе сотрудников МГУ им. М.В. Ломоносова и Главного ботанического сада РАН обнаружила и описала старовозрастный редкостойный ельник мохово-лишайниковый (Rhytidium rugosum – Cladonia spp.) на лавах в долине р. Жом-Болок (Окинское Плато, Окинский район, Республика Бурятия). В июле 2024 г. вторая экспедиция вновь посетила район исследований и более подробно изучила лесные сообщества в долине р. Жом-Болок. В статье приводятся первые данные об этих уникальных сообществах (в том числе полное геоботаническое описание одного из них). Рассмотрены отличия между этими сообществами и ельниками лишайниковыми/зеленомошно-лишайниковыми из других районов России. Намечены планы по дальнейшему исследованию и разработке мер по охране этих сообществ. Редкостойные ельники мохово-лишайниковые Окинского Плато вполне соответствуют международным (IUCN Red List of Ecosystems) и региональным критериям, предъявляемым к редким и находящимся под угрозой экосистемам.

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