Scholarlink

Abstract <p>In August 2023, a study of the plankton community of the sluice chambers of the Lenin Volga–Don shipping Canal (VDSC) and adjacent territories (the Volga River near Volgograd, between the locks and in the Tsimlyansk reservoir near Kalach-na-Donu) was conducted. Alien species from various biogeographic complexes have been recorded in all its components (phyto-, proto-, and metazooplankton). As part of the phytoplankton, <i>Skeletonema subsalsum</i> (A. Cleve) Bethge, 1928 is from the Ponto-Caspian complex. The marine species <i>Leprotintinnus pellucides</i> (Cleve, 1899) is included as part of the ciliates. Nine species from various biogeographic complexes were found in zooplankton, namely, <i>Heterocope caspia</i> Sars G.O., 1897; <i>Eurytemora caspica</i> Sukhikh &amp; Alekseev, 2013; <i>Cercopagis (Cercopagis) pengoi</i> (Ostroumov, 1891) from the Ponto-Caspian; <i>Cornigerius maeoticus</i> (Pengo, 1879) from the Ponto-Azov; <i>Calanipeda aquaedulcis</i> Krichagin, 1873 from the Mediterranean; <i>Thermocyclops taihokuensis</i>, Harada, 1931 from the East Asian; and the American <i>Acanthocyclops americanus</i> (Marsh, 1893) and <i>Moina</i> cf. <i>micrura</i> Kurz, 1875 with uncertain status. It has been established that, despite the intensive mixing of water in the sluice chambers, alien species are actively developing and entering the rank of dominant ones. The proportion of dead Copepoda individuals in sluice chambers is lower than that of Cladocera. However, the abundance of Cladocera is so large that, even with high mortality, they are part of the dominant complex of species, while some zooplankter individuals were in an active reproductive state. Significant abiotic factors for alien species in the VDSC are electrical conductivity (for <i>Heterocope caspia</i>, <i>Moina</i> cf. <i>micrura</i>, and <i>Acanthocyclops</i> <i>americanus</i>) and temperature (for <i>Skeletonema subsalsum</i>). For crustaceans consuming detritus, bacteria, algae, ciliates, and other zooplankters, reliable correlations with the listed food resources are noted.</p>

错误：搜索内容不能为空，请输入英文关键词
错误：关键词超出字数限制，请精简
高级检索

Alien Species in the Plankton Community of the Volga–Don Shipping Canal

  • 期刊论文

  • 发表日期：

    2025年2月1日

查看全文
  • N. G. Tarasova,
  • O. V. Mukhortova,
  • S. V. Bykova,
  • A. S. Semenova,
  • Ya. V. Stroynov,
  • I. S. Mikryakova

摘要

Abstract

In August 2023, a study of the plankton community of the sluice chambers of the Lenin Volga–Don shipping Canal (VDSC) and adjacent territories (the Volga River near Volgograd, between the locks and in the Tsimlyansk reservoir near Kalach-na-Donu) was conducted. Alien species from various biogeographic complexes have been recorded in all its components (phyto-, proto-, and metazooplankton). As part of the phytoplankton, Skeletonema subsalsum (A. Cleve) Bethge, 1928 is from the Ponto-Caspian complex. The marine species Leprotintinnus pellucides (Cleve, 1899) is included as part of the ciliates. Nine species from various biogeographic complexes were found in zooplankton, namely, Heterocope caspia Sars G.O., 1897; Eurytemora caspica Sukhikh & Alekseev, 2013; Cercopagis (Cercopagis) pengoi (Ostroumov, 1891) from the Ponto-Caspian; Cornigerius maeoticus (Pengo, 1879) from the Ponto-Azov; Calanipeda aquaedulcis Krichagin, 1873 from the Mediterranean; Thermocyclops taihokuensis, Harada, 1931 from the East Asian; and the American Acanthocyclops americanus (Marsh, 1893) and Moina cf. micrura Kurz, 1875 with uncertain status. It has been established that, despite the intensive mixing of water in the sluice chambers, alien species are actively developing and entering the rank of dominant ones. The proportion of dead Copepoda individuals in sluice chambers is lower than that of Cladocera. However, the abundance of Cladocera is so large that, even with high mortality, they are part of the dominant complex of species, while some zooplankter individuals were in an active reproductive state. Significant abiotic factors for alien species in the VDSC are electrical conductivity (for Heterocope caspia, Moina cf. micrura, and Acanthocyclops americanus) and temperature (for Skeletonema subsalsum). For crustaceans consuming detritus, bacteria, algae, ciliates, and other zooplankters, reliable correlations with the listed food resources are noted.