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<p>Lake terrestrialisation greatly transforms functioning of freshwater ecosystems leading to considerable changes in primary production, sedimentation rates and community composition. In order to understand the main factors controlling this process, the long-term data accounting for various aspects of lake functioning are required. Here we present a multi-proxy palaeoecological study of shoreline terrestrialisation of Lake Glubokoe located in the forest zone of East European Plain (Moscow region) during the late Holocene. We have used radiocarbon dating, loss on ignition, X-ray fluorescence, humification degree, plant macrofossil, pollen, Cladocera, chironomid and testate amoeba analyses. We found that the water level in the lake was higher than present until 1840&#xa0;cal&#xa0;yr BP, that resulted in minerogenic sediment accumulation at the site. After that, the lake underwent the following stages of shoreline terrestrialisation including a gradual water-level decrease and eutrophication with the accumulation of organic-rich deposits (1840–1120&#xa0;cal&#xa0;yr BP), intensive development of riparian vegetation (1120–990&#xa0;cal&#xa0;yr BP), a short-term dry interval which was probably associated with Medieval Warm Period (MWP, 990–850&#xa0;cal&#xa0;yr BP) and the formation of an eutrophic wetland at the shoreline (850&#xa0;cal&#xa0;yr BP—the present). The eutrophication was associated with a climate-driven increase in biological productivity of the lake and possibly by a greater human activity in the area. Our data suggest that terrestrialisation of Lake Glubokoe was a complex process driven by climate, ecological succession and human activities. These findings support the results of the previous studies on the long-term dynamics of lake ecosystems showing the importance of climate effects on the water level in the lakes with small upstream catchment and provide a context for an interpretation of the existing century-long instrumental observations.</p>

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Palaeoecological reconstruction of shoreline terrestrialisation of Lake Glubokoe (Smolensk-Moscow Upland) in the late Holocene based on the results of a multi-proxy analysis

  • 期刊论文

  • 发表日期：

    2025年8月16日

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  • Yulia A. Pastukhova,
  • Andrey N. Tsyganov,
  • Natalia G. Mazei,
  • Elena E. Severova,
  • Dmitrii O. Sadokov,
  • Viktor A. Chernyshov,
  • Ekaterina V. Tkacheva,
  • Jinyue Li,
  • Yanwei Liu,
  • Alexey A. Kotov,
  • Andrey V. Kitashov,
  • Ping Ding,
  • Yuri A. Mazei

摘要

Lake terrestrialisation greatly transforms functioning of freshwater ecosystems leading to considerable changes in primary production, sedimentation rates and community composition. In order to understand the main factors controlling this process, the long-term data accounting for various aspects of lake functioning are required. Here we present a multi-proxy palaeoecological study of shoreline terrestrialisation of Lake Glubokoe located in the forest zone of East European Plain (Moscow region) during the late Holocene. We have used radiocarbon dating, loss on ignition, X-ray fluorescence, humification degree, plant macrofossil, pollen, Cladocera, chironomid and testate amoeba analyses. We found that the water level in the lake was higher than present until 1840 cal yr BP, that resulted in minerogenic sediment accumulation at the site. After that, the lake underwent the following stages of shoreline terrestrialisation including a gradual water-level decrease and eutrophication with the accumulation of organic-rich deposits (1840–1120 cal yr BP), intensive development of riparian vegetation (1120–990 cal yr BP), a short-term dry interval which was probably associated with Medieval Warm Period (MWP, 990–850 cal yr BP) and the formation of an eutrophic wetland at the shoreline (850 cal yr BP—the present). The eutrophication was associated with a climate-driven increase in biological productivity of the lake and possibly by a greater human activity in the area. Our data suggest that terrestrialisation of Lake Glubokoe was a complex process driven by climate, ecological succession and human activities. These findings support the results of the previous studies on the long-term dynamics of lake ecosystems showing the importance of climate effects on the water level in the lakes with small upstream catchment and provide a context for an interpretation of the existing century-long instrumental observations.