Abstract
Fifty samples of bottom sediments were taken in 2016–2017 in the Kandalaksha Bay of the White Sea from the depth of 1.5–15.0 m, and 1419 colonies of mycelial fungi were obtained. Based on morphological and cultural features, a total of 136 morphotypes were classified, and 81 of these were identified down to the species level. Thirteen species were new to the White Sea. The most common species were Tolypocladium cylindrosporum, Penicillium chrysogenum, Tolypocladium inflatum, Penicillium glabrum, and the anamorph of Pseudogymnoascus pannorum. The dominance of Ascomycota was a common characteristic of the mycobiota due to the anamorphic species, and the class Sordariomycetes was the most diverse and numerous group. Assessment of species richness using a cumulative curve and the calculation of the expected total number of species adjusted using the Chao2 method evidenced that approximately 81% of the species diversity was found within the study. The ordination of samples by the nMDS method with the ANOSIM test showed the high importance of combining the samples into groups based on the year of sampling and type of sediment as well as the year of sampling and type of ecotope. Therefore, the type of sediment associated with the type of coast and the presence of fresh runoff were the most important factors for the formation of mycobiota. Moreover, the communities of mycelial fungi change from year to year in the studied bottom sediments.
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ACKNOWLEDGMENTS
The authors express their gratitude to the scuba-diving team of WSBS for help in organizing the collection of research materials and to M.V. Chikina (Shirshov Institute of Oceanology, Russian Academy of Sciences) for a discussion of the study results.
Funding
The study was carried out with partial financial support of the Russian Foundation for Basic Research (grant no. 20-04-00882a, processing and analysis of primary data on species composition) and the grant of Moscow State University for supporting the leading scientific schools of Moscow State University “ ‘Noah’s Ark’ Living Systems Depository, National Depositary Bank of Living Systems” in the framework of the Development Program of Moscow State University (statistical processing).
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Translated by D. Martynova
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Bubnova, E.N., Grum-Grzhimaylo, O.A. & Kozlovsky, V.V. Composition and Structure of the Community of Mycelial Fungi in the Bottom Sediments of the White Sea. Moscow Univ. Biol.Sci. Bull. 75, 153–158 (2020). https://doi.org/10.3103/S0096392520030037
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DOI: https://doi.org/10.3103/S0096392520030037