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<p>Despite the fact that the climate warming has been recorded throughout the Urals region, the response of lake ecosystems to this phenomenon varies significantly. The primary hypothesis of this study was that the response of Ural lakes to climate warming varies within the lake and is influenced by both the ecoregion and human activities. To verify it, we conducted a paleolimnological study of Lake Bannoye (Yaktykul) located significantly further south than previously studied lakes. A multiproxy study of the lake sediment cores was conducted using diatom, chironomid, palynological, geochemical, and hydrochemical analysis. As in Polar Ural lakes, the main driving force of changes in Lake Yaktykul over the past 300&#xa0;years was climate impact. The clearest response of the lake to the climate warming has occurred since ca. AD 1970. In a deep-water part, changes driven by an increase in temperature and a stratification intensification were more pronounced than those in the shallower part influenced to a greater extent by aquatic plants, precipitation, and local nutrient load. The effects of mining and metallurgy were reflected only in the slight enrichment of sediments with potentially toxic elements. Despite occasional increases in nutrients, no eutrophication trend was discovered in Lake Bannoye.</p>

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Ecosystem of the oligotrophic mountain Lake Bannoye (Southern Urals, Russia): shifts and drivers for more than 300 years

  • 期刊论文

  • 发表日期：

    2025年10月15日

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  • Anna Maslennikova,
  • Liudmila Syrykh,
  • Larisa Nazarova,
  • Vasiliy Gulakov,
  • Vasily Grigoriev,
  • Ksenya Filippova,
  • Sergey Sadykov,
  • Pavel Aminov,
  • Nikolai Udachin,
  • Ivan Blinov

摘要

Despite the fact that the climate warming has been recorded throughout the Urals region, the response of lake ecosystems to this phenomenon varies significantly. The primary hypothesis of this study was that the response of Ural lakes to climate warming varies within the lake and is influenced by both the ecoregion and human activities. To verify it, we conducted a paleolimnological study of Lake Bannoye (Yaktykul) located significantly further south than previously studied lakes. A multiproxy study of the lake sediment cores was conducted using diatom, chironomid, palynological, geochemical, and hydrochemical analysis. As in Polar Ural lakes, the main driving force of changes in Lake Yaktykul over the past 300 years was climate impact. The clearest response of the lake to the climate warming has occurred since ca. AD 1970. In a deep-water part, changes driven by an increase in temperature and a stratification intensification were more pronounced than those in the shallower part influenced to a greater extent by aquatic plants, precipitation, and local nutrient load. The effects of mining and metallurgy were reflected only in the slight enrichment of sediments with potentially toxic elements. Despite occasional increases in nutrients, no eutrophication trend was discovered in Lake Bannoye.