This paper presents the diatom data on Holocene sediments of Lake Tavatui (Middle Urals, Russia). The dataset includes abundances of 160 diatom taxa and quantitative reconstructions of total phosphorus and electrical conductivity of lake water through more than 11.7 cal ka BP. Diatom identification was performed using a Mikmed 6 var. 7 microscope, bright-field oil immersion optics at 1000 × magnification. At least 500 valves were counted to determine the relative abundances in the assemblages (diatom total, percentage). Quantitative reconstructions of lake water parameters were obtained based on the diatom inference models developed by simple weighted averaging and weighted averaging partial least squares methods. The data make it possible to refine the Middle Urals palaeoenvironmental reconstructions and to determine the main natural and human drivers on the Lake Tavatui ecosystem development during the Holocene. These data are an integral part of the original research paper (Maslennikova, 2022). Lake Tavatui sediment samples and diatom slide collections presented in this paper are kept in the South Urals Research Center of Mineralogy and Geoecology, Urals Branch, Russian Academy of Sciences (Russia). This dataset can be used in the regional comparison over the Holocene, in the research focused on human and natural impact on lake ecosystems, and in the investigation of diatom species distribution.
Keywords: Diatoms; Electrical conductivity; Holocene; Lake sediment core; Quantitative reconstruction; Total phosphorus; Urals.
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