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Abstract <p>The contents of heavy metals (cadmium, copper, nickel, lead, iron, manganese, and zinc) in whole thalli and several fragments of the perennial brown alga <i>Fucus distichus</i> subsp. <i>evanescens</i> (C. Agardh) H.T.&#xa0;Powell was studied in background and polluted areas of the northwestern Sea of Japan in 2020. In the background area (Oprichnik Bay), the old parts and branches with receptacles of <i>F. distichus</i> contained 1.5–2 times more iron, manganese, and nickel than the growing tips. In the polluted area (Rudnaya Bay), differences between thallus parts were found in the concentrations of zinc, cadmium, iron, manganese, and nickel. The degree of heavy metal pollution in Rudnaya Bay was assessed by comparing the concentrations in growing tips of algae with the threshold concentrations. The highest exceedance was found for zinc, by 29–36&#xa0;times in the Kovsh Harbor of Rudnaya Bay. Accompanying pollutants included copper, manganese, cadmium, iron, and lead. The causes of the long-term changes in the ecological status of Rudnaya Bay are discussed.</p>

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The Brown Alga Fucus distichus subsp. evanescens (C. Agardh) H.T. Powell as an Indicator of Heavy Metal Pollution of the Marine Environment

  • 期刊论文

  • 发表日期：

    2025年6月1日

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  • S. I. Kozhenkova

摘要

Abstract

The contents of heavy metals (cadmium, copper, nickel, lead, iron, manganese, and zinc) in whole thalli and several fragments of the perennial brown alga Fucus distichus subsp. evanescens (C. Agardh) H.T. Powell was studied in background and polluted areas of the northwestern Sea of Japan in 2020. In the background area (Oprichnik Bay), the old parts and branches with receptacles of F. distichus contained 1.5–2 times more iron, manganese, and nickel than the growing tips. In the polluted area (Rudnaya Bay), differences between thallus parts were found in the concentrations of zinc, cadmium, iron, manganese, and nickel. The degree of heavy metal pollution in Rudnaya Bay was assessed by comparing the concentrations in growing tips of algae with the threshold concentrations. The highest exceedance was found for zinc, by 29–36 times in the Kovsh Harbor of Rudnaya Bay. Accompanying pollutants included copper, manganese, cadmium, iron, and lead. The causes of the long-term changes in the ecological status of Rudnaya Bay are discussed.