Journal of Siberian Federal University. Biology / Reconstruction of the Dynamics of Fires in the Southern Taiga Subzone of Western Siberia from the Late Glacial to the Present Based on Bottom Sediments of Lake Shchuchye

Full text (.pdf)
Issue
Journal of Siberian Federal University. Biology. 2025 18 (3)
Authors
Pupysheva, Maria A.; Blyakharchuk, Tatiana A.
Contact information
Pupysheva, Maria A.: Institute of Monitoring of Climatic and Ecological Systems SB RAS Tomsk, Russian Federation; ; ORCID: 0009-0009-5189-0895; Blyakharchuk, Tatiana A. : Institute of Monitoring of Climatic and Ecological Systems SB RAS Tomsk, Russian Federation; National Research Tomsk State University Tomsk, Russian Federation; ORCID: 0000-0001-7650-1600
Keywords
CharAnalysis; Western Siberia; paleofires reconstruction; CharAnalysis; macro-charcoal analysis; radiocarbon dating
Abstract

This article presents the results of reconstructing the long-term dynamics of paleofires in the southern taiga subzone of Western Siberia (Tomsk Oblast) based on the analysis of bottom sediments from Lake Shchuchye. Radiocarbon dating indicates that sediment formation began approximately 13,200 cal BP, spanning the end of the Late Glacial and the entire Holocene. Lake Shchuchye itself formed around 12,400 cal BP. Through macro-charcoal and radiocarbon analyses, 15 local fire episodes were identified, with their timing and fire intensity determined. Throughout the existence of Lake Shchuchye, six periods of high pyrogenic activity were observed: 12,300–11,100, 8,900–8,700, 5,800–5,500, 5,100–4,800, 2,800–2,500 and 1,250–1,000 cal BP. Temporal distribution of local fires was uneven. The fire dynamics data from the area of Lake Shchuchye were compared with the previously published reconstructions of climate, vegetation and regional fires for the same study area. The analysis revealed that the most intense fires occurred at the end of the Younger Dryas and the beginning of the Preboreal period of the Holocene (12,300–11,100 cal BP) in treeless or partially forested open landscapes under dry and cold climatic conditions. The results demonstrate a direct influence of climate change on fire occurrence and intensity, as well as on vegetation cover changes. The periods of high pyrogenic activity predominantly coincided with dry climatic intervals (12,300–11,100, 8,900–8,700, 5,800–5,500, 5,100–4,800 and 1,250–1,000 cal BP), whereas wet periods generally inhibited fire spread in the Lake Shchuchye area

Pages
303–315
EDN
HUJLRU
Paper at repository of SibFU
https://elib.sfu-kras.ru/handle/2311/157487

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