제주도 근해 식물플랑크톤-동물플랑크톤-멸치-고등어 영양단계에서 210Pb과 210Po의 생물농축
Bio-accumulation of 210Pb and 210Po within the Trophic Level of Phytoplankton-Zooplankton-Anchovy-Mackerel in the Coastal Water of the Jeju Island, Korea
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The activity concentrations of 210Po and 210Pb within phytoplankton-zooplankton-anchovymackerel in the coastal water of the Jeju Island were determined to understand their distribution and bioaccumulation along the trophic level. In the surface water, the total activity concentrations of 210Po and 210Pb were 0.83 ± 0.004 mBq kg−1 and 1.27 ± 0.03 mBq kg−1. And the dissolved activity concentration of 210Po and 210Pb were 0.75 ± 0.06 mBq kg−1 and 1.22 ± 0.09 mBq kg−1 respectively. In the phytoplankton, the concentration factor (CF) of 210Po and 210Pb were 1.5 × 105 and 2.6 × 104 shows 210Po is 5 times higher compared to 210Pb. The similar CF factor in the zooplankton of 210Po was derived as 1.4 × 105. The CF of 210Po in anchovy was increased twice compared to that in plankton. This is the evidence that there is 210Po bio-magnification in the trophic level of plankton-anchovy. However the 210Po activity concentration in the muscle tissue of mackerel was one-hundred times lower than that in anchovy. This reflects that in the trophic level of anchovy-mackerel, the bio-accumulation of 210Po is decreased. The activity concentrations of 210Po in the internal organs of anchovy and mackerel were 8 to 38 times higher than those in muscle tissues. In phytoplankton-zooplankton-anchovy, the CF of 210Pb was decreased five times along the trophic level in order. In anchovy-mackerel it was decreased by 30−70%.
Abstract
The activity concentrations of 210Po and 210Pb within phytoplankton-zooplankton-anchovymackerel in the coastal water of the Jeju Island were determined to understand their distribution and bioaccumulation along the trophic level. In the surface water, the total activity concentrations of 210Po and 210Pb were 0.83 ± 0.004 mBq kg−1 and 1.27 ± 0.03 mBq kg−1. And the dissolved activity concentration of 210Po and 210Pb were 0.75 ± 0.06 mBq kg−1 and 1.22 ± 0.09 mBq kg−1 respectively. In the phytoplankton, the concentration factor (CF) of 210Po and 210Pb were 1.5 × 105 and 2.6 × 104 shows 210Po is 5 times higher compared to 210Pb. The similar CF factor in the zooplankton of 210Po was derived as 1.4 × 105. The CF of 210Po in anchovy was increased twice compared to that in plankton. This is the evidence that there is 210Po bio-magnification in the trophic level of plankton-anchovy. However the 210Po activity concentration in the muscle tissue of mackerel was one-hundred times lower than that in anchovy. This reflects that in the trophic level of anchovy-mackerel, the bio-accumulation of 210Po is decreased. The activity concentrations of 210Po in the internal organs of anchovy and mackerel were 8 to 38 times higher than those in muscle tissues. In phytoplankton-zooplankton-anchovy, the CF of 210Pb was decreased five times along the trophic level in order. In anchovy-mackerel it was decreased by 30−70%.
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