A multi-proxy centennial-resolution paleoecological record of Holocene lake sediments in the marginal zone of Last Scandinavian Glaciation (Tver Region, Russia)

Nosova, M.B.; Zakharov, A.L.; Lavrenov, N.G.; Zaretskaya, N.E.; Mazei, N.G.; Kupriyanov, D.A.; Pastukhova, Y.A.; Bakumenko, V.O.; Severova, E.E.; Konstantinov, E.A.

Авторы: Nosova M.B., Zakharov A.L., Lavrenov N.G., Zaretskaya N.E., Mazei N.G., Kupriyanov D.A., Pastukhova Yu A., Bakumenko V.O., Severova E.E., Konstantinov E.A.
Журнал: Quaternary International
Том: 729
Год издания: 2025
Издательство: Pergamon Press Ltd.
Местоположение издательства: United Kingdom
Номер статьи: 109778
DOI: 10.1016/j.quaint.2025.109778
Аннотация: This paper presents a new centennial-resolution multi-proxy record of Holocene environmental changes obtained from the small Petrovskoe Lake in the former marginal zone of the Last Scandinavian (Valdai) Glaciation.The series of analyses of the lacustrine deposits includes grain size, loss on ignition, magnetic susceptibility, pollen, macrofossils, cladocerans, chironomids, and macrocharcoals, and was conducted on a 16.35 m-long sediment core. Based on the obtained data, the mass accumulation rate was calculated, and stages of vegetation change were determined using the biomisation method. The stages of the reservoir’s development were also identified.It was revealed that during the initial stage of development (11,000–10,200 cal yr BP), a Sphagnum mire formed on a buried block of dead ice, which was subsequently flooded, resulting in the formation of a kettle-hole lake. From 11,000 to 10,000 cal yr BP, “cold” biomes with dominance of Betula and Pinus prevailed. The periods of most active erosion during the early Holocene correspond to 10,200–9,400 cal yr BP.The further development of the lake followed a path of steadily increasing trophicity and sedimentation rate. A rapid increase in broadleaved taxa led to the emergence of a warm mixed forest biome as early as 9,500 cal yr BP. A long warm period, characterized by the dominance of broadleaved species (Tilia, Quercus, Fraxinus, Ulmus), lasted until 4,200 cal yr BP, when taiga and cold deciduous forest biomes began to replace the warm mixed forests.Key moments of anthropogenic impact, which contributed to the progressive degradation of primary forests and their replacement by secondary stands, began around 4,200, 2,900, 2,200, 1,500, 1,200, and 800 cal yr BP. These coincide with archaeological cultural shifts, short-term episodes of erosion, and correlate well with fire activity.
Добавил в систему: Лавренов Никита Геннадьевич

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A multi-proxy centennial-resolution paleoecological record of Holocene lake sediments in the marginal zone of Last Scandinavian Glaciation (Tver Region, Russia)статья

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