Assessment of Holocene climate influence on hydrothermal regime of paleoecotopes within Ryams of the Baraba forest-steppe (southern Western Siberia)

Abstract

A clearly defined trend of alterations in the properties of peat across the depth of the deposit has been observed in the two studied ryams of the Barabinsk forest-steppe. The changes in peat properties influenced by external factors outweigh those induced by autogenic development of the bog. In order to achieve an accurate reconstruction of changes in the water regimes of ryams, it is essential to consider that the properties of peats reflect not only the state of the water regime at the time of their deposition but also subsequent changes over time. Both peat sections exhibit a catastrophic transition from the eutrophic to the oligotrophic stage of development approximately 4100 and 1100 years ago.