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Abstract <p>Vertical bathyphotometric soundings of bioluminescent potential using the Salpa MA+ probe were carried out in January–February 2022 at 37 stations in the photic zone in the Antarctic Sound, Bransfield Strait, and northwestern Weddell Sea during the Antarctic expedition on cruise 87 of the R/V <i>Akademik Mstislav Keldysh</i>. The soundings were accompanied by measurements of temperature, electrical conductivity, photosynthetically active radiation, and collection of plankton samples with their subsequent processing. Seven bioluminescent plankton species have been identified: <i>Pelagobia longicirrata</i> Greeff, 1879, <i>Protoperidinium depressum</i> (J.W. Bailey) Balech, 1974, <i>Protoperidinium аntarcticum</i> (Schimper ex Karsten) Balech, 1974, <i>Metridia gerlachei</i> Giesbrecht, 1902, <i>Oithona similis</i> Claus, 1866, <i>Euphausia superba</i> Dana, 1850, and <i>Salpa thompsoni</i> Foxton, 1961. Comprehensive studies have shown that the spatial structure of the bioluminescent potential field (its vertical and horizontal components) is formed by the two main factors: the taxonomic structure of the plankton community and the thermohaline structure of the biotope. The species and taxonomic groups dominating in the formation of the bioluminescent potential differed significantly in all three study sites. The characteristics of the thermohaline structure in these regions were also significantly different.</p>

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Bioluminescence of Plankton Communities in the Atlantic Sector of the Southern Ocean

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • A. V. Melnik,
  • L. A. Melnik,
  • S. A. Piontkovsky

摘要

Abstract

Vertical bathyphotometric soundings of bioluminescent potential using the Salpa MA+ probe were carried out in January–February 2022 at 37 stations in the photic zone in the Antarctic Sound, Bransfield Strait, and northwestern Weddell Sea during the Antarctic expedition on cruise 87 of the R/V Akademik Mstislav Keldysh. The soundings were accompanied by measurements of temperature, electrical conductivity, photosynthetically active radiation, and collection of plankton samples with their subsequent processing. Seven bioluminescent plankton species have been identified: Pelagobia longicirrata Greeff, 1879, Protoperidinium depressum (J.W. Bailey) Balech, 1974, Protoperidinium аntarcticum (Schimper ex Karsten) Balech, 1974, Metridia gerlachei Giesbrecht, 1902, Oithona similis Claus, 1866, Euphausia superba Dana, 1850, and Salpa thompsoni Foxton, 1961. Comprehensive studies have shown that the spatial structure of the bioluminescent potential field (its vertical and horizontal components) is formed by the two main factors: the taxonomic structure of the plankton community and the thermohaline structure of the biotope. The species and taxonomic groups dominating in the formation of the bioluminescent potential differed significantly in all three study sites. The characteristics of the thermohaline structure in these regions were also significantly different.