Vulnerability of the Ancient Peat Plateaus in Western Siberia

Based on the data of the plant macrofossil and palynological composition of the peat deposits, the evolution and current state of polygonal peatlands were analyzed at the southern limit of continuous permafrost in the Pur-Taz interfluve. Paleoreconstruction shows that peat accumulation began in the...

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Bibliographic Details
Published in:Plants
Main Authors: Alexander Pastukhov, Tatiana Marchenko-Vagapova, Sergey Loiko, Dmitry Kaverin
Format: Article in Journal/Newspaper
Language:English
Published: MDPI AG 2021
Subjects:
cryolithozone
degradation
bogs
arctic peatlands
permafrost
soil–geocryological complex
Botany
QK1-989
Arctic
Peat
Siberia
Online Access:https://doi.org/10.3390/plants10122813
https://doaj.org/article/890fb168799c4f50b0b23dbc900e03f9
Description
Summary:Based on the data of the plant macrofossil and palynological composition of the peat deposits, the evolution and current state of polygonal peatlands were analyzed at the southern limit of continuous permafrost in the Pur-Taz interfluve. Paleoreconstruction shows that peat accumulation began in the Early Holocene, about 9814 cal. year BP, in the Late Pre-Boreal (PB-2), at a rate of 1 to 1.5 mm year −1 . Intensive peat accumulation continued in the Boreal and early Atlantic. The geocryological complex of polygonal peatlands has remained a stable bog system despite the predicted warming and increasing humidity. However, a rather rapid upper permafrost degradation and irreversible changes in the bog systems of polygonal peatlands occur with anthropogenic disturbances, in particular, a change in the natural hydrological regime under construction of linear objects.

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