Dynamics of Vegetation and Fires in Gornaya Shoriya (Northern Altai Mountains) in the Late Holocene According to Palynological and Charcoal Research into the Maly Labysh Mire
2022
Blyakharchuk, T. A. | Pupysheva, M. A.
In this work, the reconstruction of past vegetation and fire dynamics in northern Altai is performed by a pollen and charcoal investigation into the peat deposits of the Maly Labysh mire located in the upper reaches of the Kondoma River in Shorsky National Park. Lithology and radiocarbon dating have shown that the mire is of lacustrine origin. An oxbow lake originated about 3000 years ago, and about 2200 years ago it turned into a swamp. A spore–pollen (SP) analysis of lacustrine and peat deposits revealed repeated changes in the vegetation cover, probably caused by climate instability during the last 3000 years. In general, two humid millennial periods (3000–1800 cal yr BP and 550–200 cal yr BP) were identified when the role of fir increased in the forests, alternating with two drier periods (1600–900 cal yr BP and 200 cal yr BP—contemporary), when the fir gave way to birch forests. This article also represents data on the dynamics of paleofires in the area of the Maly Labysh mire based on micro- and macrocharcoal analyses. A comparison of the results of pollen and charcoal investigations with other paleoclimatic reconstructions in Western Siberia in the Holocene is given. A conclusion is drawn about the connection between paleofires and the dynamics of humidity of the climate, which together influenced the vegetation change in Gornaya Shoriya.
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