Hg bioaccumulation in marine copepods around hydrothermal vents and the adjacent marine environment in northeastern Taiwan |
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| Authors: | Shih-Hui Hsiao Tien-Hsi Fang |
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| Institution: | 1. Department of Science Education, National Taipei University of Education, Taipei 106, Taiwan, ROC;2. Department of Marine Environmental Informatics, National Taiwan Ocean University, Keelung 202, Taiwan, ROC |
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| Abstract: | The Hg concentration in seawater and copepod samples collected from the area around hydrothermal vents at Kueishan Island and the adjacent marine environment in northeastern Taiwan were analyzed to study Hg bioaccumulation in copepods living in polluted and clean marine environments. The seawater collected from the hydrothermal vent area had an extremely high concentration of dissolved Hg, 50.6–256 ng l−1. There was slightly higher Hg content in the copepods, 0.08–0.88 μg g−1. The dissolved Hg concentration in the hydrothermal vent seawater was two to three orders of magnitude higher than that in the adjacent environment. The bioconcentration factor of the studied copepods ranged within 103–106, and showed higher dissolved concentration as the bioconcentration factor was lower. A substantial abundance, but with less copepod diversity was recorded in the seawater around the hydrothermal vent area. Temora turbinata was the species of opportunity under the hydrothermal vent influence. |
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| Keywords: | Hydrothermal vent Kueishan Island Copepod Mercury Bioconcentration factor |
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