Abstract
Direct multiyear observations were carried out to track changes in the species composition and structure of extrazonal steppes in the boreal zone of the Southern Urals inhabited by many rare plant species. It is shown that the mesophytization of communities has taken place in petrophytic steppes in the period of 1999–2019: the cover of meadow–steppe and steppe species increased by 6.8 times; while the cover of petrophytic-steppe species, by only 2.2 times. A portion of petrophytic steppes has been absorbed by surrounding meadow steppes. It is established that communities less than 40 m2 in size are most susceptible to the changes. The observed changes are likely caused by an increase in precipitation in the beginning of the growing season.
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ACKNOWLEDGMENTS
The author is grateful to D.V. Veselkin, Dr. Sci. (Biol.), and E.N. Podgaevskaya, Cand. Sci. (Biol.), of the Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences, for the fruitful discussion of the manuscript and to N.B. Kuyantseva, Cand. Sci. (Biol.), of Ilmen State Nature Reserve and E.N. Podgaevskaya, Cand. Sci. (Biol.), for their assistance in the field studies.
Funding
This study was performed as a part of the State Assignment of the Institute of Plant and Animal Ecology, Ural Branch, Russian Academy of Sciences, project no. AAAA-A19-119031890084-6.
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Translated by L. Emeliyanov
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Zolotareva, N.V. Dynamics of Extrazonal Steppes in the Southern Urals over a 20-year Period amid Climatic Changes. Russ J Ecol 51, 440–451 (2020). https://doi.org/10.1134/S1067413620050148
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DOI: https://doi.org/10.1134/S1067413620050148