ISSN 2070-7401 (Print), ISSN 2411-0280 (Online)
Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa
CURRENT PROBLEMS IN REMOTE SENSING OF THE EARTH FROM SPACE

  

Sovremennye problemy distantsionnogo zondirovaniya Zemli iz kosmosa, 2025, Vol. 22, No. 2, pp. 163-172

Using Landsat and UAV data to assess post-pyrogenic dynamics of drained raised bogs in the taiga zone of Western Siberia

A.A. Sinyutkina 1 
1 Siberian Research Institute of Agriculture and Peat — Division of Siberian Federal Scientific Centre of Agro-Bio Technologies RAS, Tomsk, Russia
Accepted: 07.03.2025
DOI: 10.21046/2070-7401-2025-22-2-163-172
The use of Earth remote sensing data is a reliable and affordable method for assessing the intensity of wildfires and monitoring post-pyrogenic ecosystem restoration. Under anthropogenic stress, mires are prone to fires that lead to significant carbon emissions into the atmosphere, long-term and sometimes irreversible changes in vegetation cover and disruptions in the functioning of the mire as a carbon sink. The purpose of the study is to develop and test methods based on the use of UAV survey data to assess the state of raised bogs in conditions of post-pyrogenic restoration. The objects of the study are two drained raised bogs (Bakchar and Ust-Bakchar) located in the taiga zone of Western Siberia. They burned in 2014 and 2016. The study uses data from multispectral imagery from the DJI Phantom 4 Multispectral UAV, Landsat satellite imagery and field geobotanical research. A comparison of the values of the NDVI (Normalized Difference Vegetation Index) calculated on the basis of Landsat and UAV data shows similar spatial dynamics, but the values obtained from the UAV are higher by 0.01–0.08 units. A factor analysis of NDVI values and vegetation cover characteristics shows an inverse relationship of NDVI with the proportion of surface burnout, the projective cover (PC) of Polytrichum strictum and a direct relationship with PC of sphagnum mosses and pine in the Bakchar bog with lower drainage intensity. In the drier Ust-Bakchar bog, NDVI has a direct relationship with the proportion of burnout, PC of birch undergrowth, P. strictum and an inverse relationship with PC of pine and sphagnum mosses. The interrelationships of NDVI values with the characteristics of the vegetation cover of raised bogs in conditions of post-pyrogenic restoration are individual for each object of study. An increase in the index may reflect restoration of vegetation to its original state on some sites, as is noted on the Bakchar bog, while on other bogs, on the contrary, irreversible changes in the ecosystem.
The research was financially supported by the Russian Science Foundation, project No. 22-77-10024.
Keywords: wildfire, Great Vasyugan mire, geobotanical research, Tomsk region, NDVI
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