RECONSTRUCTION OF CONDITIONS OF FORMATION OF THE EUTROPHIC PEATLAND DEPOSITS IN SOUTH OF THE TAIGA ZONE OF WESTERN SIBERIA

• Published in: Izvestiya Rossiiskoi Akademii Nauk Seriya Geograficheskaya
• Main Authors: I. V. Kurina, E. E. Veretennikova, A. A. Il’ina, E. A. Dyukarev, E. A. Golovatskaya, S. V. Smirnov, И. В. Курьина, Е. Э. Веретенникова, А. А. Ильина, Е. А. Дюкарев, Е. А. Головацкая, С. В. Смирнов
• Format: Article in Journal/Newspaper
• Language: Russian
• Published: Izvestiya Rossiiskoi Akademii Nauk. Seriya Geograficheskaya 2018
• Subjects: климатические изменения; testate amoebae; humic acids; humification; Western Siberia; climatic changes; раковинные амебы; гуминовые кислоты; степень гумификации; Западная Сибирь; taiga; Siberia
• Online Access: https://izvestia.igras.ru/jour/article/view/745; https://doi.org/10.1134/S2587556618040106

The paleoecological study of the peat deposit of the floodplain terrace eutrophic peatland located in south of the taiga zone of Western Siberia was carried out. The work is based on an integrated approach including the following methods: radiocarbon dating, macrofossil analysis, rhizopod analysis, humification degree and physico-chemical characteristics of humic acids of peats. Comparison of the results obtained by different methods allowed us to reconstruct the history of the development of floodplain terrace eutrophic peatland determined by the local hydrological, geomorphological and geochemical conditions on the background of climate change. At the first stage of development, the peatland was often flooded by the river, which provided additional introduction of mineral matters and followed by increased ash content of peat. Then the influence of the river had weakened, and the growth of the peat deposit was more determined by the factors of endogenous peat bog formation and the level of surface hydrological runoff. This led to the formation of peats with normal ash content; hygrophytic grasses were replaced with sedges and hypnum plant assemblages. The eutrophic peatland showed the highest sensitivity to climate change over the last 8500 years. It is confirmed with synchronous variations of surface wetness in different bogs of the study area. Проведено палеоэкологическое исследование торфяной залежи низинного террасного болота на юге таежной зоны Западной Сибири. Работа основана на комплексном подходе, в котором использован ряд методов: радиоуглеродное датирование, анализ ботанического состава торфа, раковинных амеб, степени гумификации и физико-химических свойств гуминовых кислот, извлеченных из торфа. Сопоставление результатов этих методов позволило воссоздать сложную историю развития низинного болота, определяемую локальными гидрологическими, геоморфологическими и геохимическими условиями на фоне происходивших климатических изменений. В начале развития болото подвергалось частым подтоплениям со стороны ...