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Abstract <p>In 2010–2020, studies of zoobenthos were carried out at 17 stations of the littoral zone of the Sheksna Reservoir. A total of 138 species of zoobenthos have been observed. In the river part, the species richness and diversity of zoobenthos is higher than in the lake part. The invasive amphipoda <i>Gmelinoides fasciatus</i> (Stebbing, 1899), first recorded in 1995, changed the zoobenthos of the reservoir. There has been an increase in the biomass of littoral zoobenthos. Some species of oligochaetes and chironomids have been displaced from the dominant species. Currently, the share of <i>G. fasciatus</i> accounts for ≤50% of the abundance and biomass of zoobenthos in littoral biotopes.</p>

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Zoobenthos of the Littoral of the Sheksna Reservoir 25 Years after the Introduction of Gmelinoides fasciatus (Crustacea, Amphipoda)

  • 期刊论文

  • 发表日期：

    2025年2月1日

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  • K. N. Ivicheva,
  • I. V. Filonenko

摘要

Abstract

In 2010–2020, studies of zoobenthos were carried out at 17 stations of the littoral zone of the Sheksna Reservoir. A total of 138 species of zoobenthos have been observed. In the river part, the species richness and diversity of zoobenthos is higher than in the lake part. The invasive amphipoda Gmelinoides fasciatus (Stebbing, 1899), first recorded in 1995, changed the zoobenthos of the reservoir. There has been an increase in the biomass of littoral zoobenthos. Some species of oligochaetes and chironomids have been displaced from the dominant species. Currently, the share of G. fasciatus accounts for ≤50% of the abundance and biomass of zoobenthos in littoral biotopes.