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Abstract <p>Galichskoe and Chukhlomskoe lakes are the largest and “oldest” in Kostroma oblast and they have similar characteristics characteristics, in particular, floristic composition and overgrowing. Aquatic vascular plants of both lakes were represented by 98 species and 1 hybrid. In Galichskoe Lake, 81 species were found among them in 2022. A comparison with data of the first survey of flora of the lakes in 1989 has shown that, over the past &gt;30 years, 32 new species have been found, including a new locality of the rare <i>Potamogeton praelongus</i>; however, 5 species have not been found. In Chukhlomskoe Lake, 70 species were found, including 19 species new for the lake when compared to the data of 1989, as well as 1 hybrid <i>Potamogeton acutifolius</i> × <i>P</i>. <i>compressus</i>, new for Kostroma oblast; 6 species were not found. The increase in the diversity of flora of both lakes is associated both with their successional changes and with local anthropogenic impact. The area of overgrowing in Galichskoe Lake was 22% and in Chukhlomskoe Lake it was 3.5%. Chukhlomskoe Lake is characterized by a higher water level due to regulation by a dam and swamp area, which slows siltation and overgrowing by aquatic plants with less floristic diversity. Species with floating leaves, mainly Nymphaeaceae, dominate in overgrowing of both lakes.</p>

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Changes in Aquatic Flora from 1989 to 2022 and Features of Overgrowing of Galichskoe and Chukhlomskoe Lakes (Kostroma Region)

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • N. K. Konotop,
  • Yu. S. Vinogradova,
  • O. G. Grishutkin,
  • E. V. Chemeris,
  • A. A. Bobrov

摘要

Abstract

Galichskoe and Chukhlomskoe lakes are the largest and “oldest” in Kostroma oblast and they have similar characteristics characteristics, in particular, floristic composition and overgrowing. Aquatic vascular plants of both lakes were represented by 98 species and 1 hybrid. In Galichskoe Lake, 81 species were found among them in 2022. A comparison with data of the first survey of flora of the lakes in 1989 has shown that, over the past >30 years, 32 new species have been found, including a new locality of the rare Potamogeton praelongus; however, 5 species have not been found. In Chukhlomskoe Lake, 70 species were found, including 19 species new for the lake when compared to the data of 1989, as well as 1 hybrid Potamogeton acutifolius × P. compressus, new for Kostroma oblast; 6 species were not found. The increase in the diversity of flora of both lakes is associated both with their successional changes and with local anthropogenic impact. The area of overgrowing in Galichskoe Lake was 22% and in Chukhlomskoe Lake it was 3.5%. Chukhlomskoe Lake is characterized by a higher water level due to regulation by a dam and swamp area, which slows siltation and overgrowing by aquatic plants with less floristic diversity. Species with floating leaves, mainly Nymphaeaceae, dominate in overgrowing of both lakes.