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<p>The aim of our study was to assess the ecosystem state of floodplain pondscapes by analyzing differences in fish assemblages between water bodies. Using QGIS, we identified 634 water bodies and delineated 49 pondscapes in the upper reaches of the Khoper River (Black Sea Basin), which is located in the center of European Russia. We surveyed 36 water bodies within 6 pondscapes to determine the species structure and relative abundance of fish via the active (dip net) and passive (funnel trap) methods. A total of 11 fish species were observed, and most of the water bodies were inhabited by one to three species. The α diversity and γ diversity were dependent on oxygen levels and plant cover, which were related to spring flooding. Different pondscapes had different dominant species that indicated their conditions: <i>Carassius carassius</i> (overgrown and desiccated), <i>Carassius gibelio</i> (large and mosaic), <i>Rhodeus sericeus</i> (water exchange with the river), <i>Misgurnus fossilis</i> (hypoxic) and <i>Perccottus glenii</i> (accessible to humans). Our study revealed that changes in fish β diversity indicate changes in more factors than changes in α diversity or γ diversity. Homogeneous fish assemblages appeared when spring flood inundation decreased and water bodies became overgrown. The results of our study may be useful for further assessments of floodplain water bodies at the pondscape scale.</p>

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Assessment of Temperate Floodplain Pondscapes Using Small Littoral Fish as Indicators

  • 期刊论文

  • 发表日期：

    2025年2月26日

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  • Ivan W. Bashinskiy,
  • Vitaly V. Osipov

摘要

The aim of our study was to assess the ecosystem state of floodplain pondscapes by analyzing differences in fish assemblages between water bodies. Using QGIS, we identified 634 water bodies and delineated 49 pondscapes in the upper reaches of the Khoper River (Black Sea Basin), which is located in the center of European Russia. We surveyed 36 water bodies within 6 pondscapes to determine the species structure and relative abundance of fish via the active (dip net) and passive (funnel trap) methods. A total of 11 fish species were observed, and most of the water bodies were inhabited by one to three species. The α diversity and γ diversity were dependent on oxygen levels and plant cover, which were related to spring flooding. Different pondscapes had different dominant species that indicated their conditions: Carassius carassius (overgrown and desiccated), Carassius gibelio (large and mosaic), Rhodeus sericeus (water exchange with the river), Misgurnus fossilis (hypoxic) and Perccottus glenii (accessible to humans). Our study revealed that changes in fish β diversity indicate changes in more factors than changes in α diversity or γ diversity. Homogeneous fish assemblages appeared when spring flood inundation decreased and water bodies became overgrown. The results of our study may be useful for further assessments of floodplain water bodies at the pondscape scale.