BIOLOGIYA MORYA, 2015, Vol. 41, No. 5, pp. 361-365 |
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Monitoring of heavy metal pollution of coastal waters of Amursky Bay (Sea of Japan) using the brown alga Sargassum miyabei Yendo, 1907 1Far Eastern Federal University, Vladivostok 690950; E-mail: The content of iron, zinc, nickel, copper, iron, cadmium, and lead was determined in the thalli of the brown alga Sargassum miyabei Yendo, 1907 from Amursky Bay. The ranges of trace metal concentrations were 166-709 for Fe, 4.7-55.7 for Zn, 6.48-15.94 for Ni, 2.5-22.4 for Cu, 3.13-6.25 for Cd, and 0.22-19.20 μg/g of dry weight for Pb. Based on the data on heavy metal content in S. miyabei, we analyzed the changes in the trace element composition of this seaweed during the period from the mid-1990s to 2011. The concentration level of lead in S. miyabei significantly decreased (p = 0.001) at most stations. At some of the sampling stations, Zn concentration decreased 1.2-2.5-fold and Cu concentration decreased 1.1-2.8-fold (tendency level). At the same time, high concentration levels of Ni and Cd were found in S. miyabei from the area near a liquid fuel power plant. A 2-fold increase (tendency level) in the content of Zn and Cu was found in S. miyabei collected in a recreation area at the outlet from the bay and at the entrance cape of the inner bay of Port Vladivostok. This is evidently caused by increasing recreational pressure in the outside bay and industrial and municipal wastewater pollution in the inner bay. Key words: Sea of Japan, Amursky Bay, pollution, trace metals, bioindication, Sargassum miyabei. |
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