The aim of research is to carry out the assessment of pyrogenic load and vegetation recovery dynamics after the fire event in 2016 within the drained bog site in Gavrilovka River basin. Specifically, the objectives of this study were to: 1) perform a retrospective analysis of the water-thermal regime according to monitoring data on the nearby site 2) estimate zone of contamination by combustion products; 3) determine the quantitative characteristics of vegetation restoration based on field and satellite data; 4) estimate the organic hydrocarbons in mire and river waters, peat and typical plants of the pyrogenic disturbed bog. The water-thermal retrospective analysis is confirmed that in August 2016 most favorable conditions for the emergence of a fire-dangerous situation were developed. The area of Zn and Pb pollution covers an area of 8 km, which is consistent with the prevailing wind direction and atmospheric deposition data for 2016. The zone of extreme pollution of heavy metals peat deposits is limited mainly by the zone of intensive burning of the surface, however, and beyond it there was also a significant (2 times) Zn, Cd, Pb concentration (except Cu) increasing, mainly due to the migration of elements with water flow. Carbon losses for the burned area of 1 square meter to a depth of 30 cm were about 3800 gC/m2. Intensive recovery of vegetation cover and NDVI increase was noted mainly due to the growth of the shrubs and sedge in the period from 2017 to 2018. Against the background of a decrease in the content of n-alkanes, their share in the composition of peat lipids of the burnt area increases slightly, among them the content of homologues C23-C25 increases, C29 – C33 decreases and the CPI value decreases.
The reported study was funded by RFBR according to the research project № 18-44-700005
|Position of speaker||старший научный сотрудник|
|Affiliation of speaker||Сибирский институт сельского хозяйства и торфа|