Siberian Federal University

Issue

Journal of Siberian Federal University. Biology. 2025 18 (3)

Authors

Grenaderova, Anna V.; Knorre, Anastasia A.; Ponomarev, Georgiy E.; Kuznetsova, Daria A.; Gireva, Anna V.; Barabantsova, Anna E.; Pavlova, Dana Yu.; Mikhailova, Alexandra B.; Podobueva, Olga V.; Filippova, Irina P.

Contact information

Grenaderova, Anna V.: Siberian Federal University Krasnoyarsk, Russian Federation; ORCID: 0000-0002-5599-2129; Knorre, Anastasia A.: Siberian Federal University Krasnoyarsk, Russian Federation; Krasnoyarskie Stolby National Park Krasnoyarsk, Russian Federation; ORCID: 0000-0001-9033-2292; Ponomarev, Georgiy E.: Siberian Federal University Krasnoyarsk, Russian Federation; Kuznetsova, Daria A.: Siberian Federal University Krasnoyarsk, Russian Federation; Gireva, Anna V. : Krasnoyarskie Stolby National Park Krasnoyarsk, Russian Federation; Barabantsova, Anna E. : Krasnoyarskie Stolby National Park Krasnoyarsk, Russian Federation; Pavlova, Dana Yu.: Krasnoyarskie Stolby National Park Krasnoyarsk, Russian Federation; ORCID: 000-0003-0104-9036; Mikhailova, Alexandra B. : Siberian Federal University Krasnoyarsk, Russian Federation; ORCID: 0000-0002-3198-5215; Podobueva, Olga V.: Siberian Federal University Krasnoyarsk, Russian Federation; ORCID: 0009-0002-4987-0077; Filippova, Irina P.: Siberian Federal University Krasnoyarsk, Russian Federation

Keywords

vegetation dynamics; peat deposits; Holocene; charcoal; fire history; protected areas; Eastern Sayan

Abstract

Climate change inevitably leads to transformations in vegetation cover through various impacts including fires. Paleoecological studies are crucial for assessing rates of contemporary environmental changes, particularly in protected areas, where data on paleofire history can serve as a baseline for monitoring current fire regimes. The purpose of the present study was to reconstruct local vegetation dynamics and fire history in the upper Bolshoy Inzhul River catchment area through a multi-proxy paleoecological analysis of Holocene peat deposits. This study presents the results of a paleobotanical investigation of peat deposits from the low-mountain region of the northwestern macroslope of the Eastern Sayan Range. We provide data derived from accelerator mass spectrometry (AMS) radiocarbon dating, botanical analysis, and paleoanthracological examination. For the first time, within the Krasnoyarskie Stolby National Park, macrocharcoal particle analysis was performed, combined with high-resolution sampling (1-cm intervals) and detailed chronological control (16 radiocarbon dates), enabling the reconstruction of fire event frequency and intensity. The results demonstrate exceptionally low macrocharcoal concentrations in the Bolshoy Inzhul mire deposits (no greater than 18 particles/ cm³). Periods of increased fire activity were identified and correlated with global climatic shifts: the Holocene Thermal Maximum (8.2–5.7 cal BP), the Mid-Subboreal climatic optimum (4.4–3.5 cal BP), and the increase in climate continentality in the recent 600 years. The peat accumulation process was initiated by reduced moisture availability during the early neoglacial period (5.4–4.7 cal BP), when paludification started in a mixed fir–spruce forest with Siberian pine, Scots pine and a horsetail-green moss understory in the interfluve of the Bolshoy Inzhul River headwaters. A forested mire (sogra) persisted for an extended period. Starting from 3.0–2.4 cal BP, the influence of fluvial waters on mire hydrology diminished, leading to a succession from forested to transitional forest-mire, and, eventually, to a raised mire stage dominated by Sphagnum mosses. Over the past 70 years, the mire vegetation has been represented by a waterlogged spruce forest with a ground layer of cowberry, cranberry and Sphagnum moss

Pages

389–418

EDN

MZFHOR

Paper at repository of SibFU

https://elib.sfu-kras.ru/handle/2311/157492

This work is licensed under a Creative Commons Attribution-NonCommercial 4.0 International License (CC BY-NC 4.0).