Institute of Oceanography, University of Gdańsk, Piłsudskiego 46, 81-378 Gdynia, Poland.
Institute of Oceanography, University of Gdańsk, Piłsudskiego 46, 81-378 Gdynia, Poland.
Mar Pollut Bull. 2020 Apr;153:110968. doi: 10.1016/j.marpolbul.2020.110968. Epub 2020 Feb 13.
The study was conducted in the coastal zone of the southern Baltic. The research material consisted of macrozoobenthos and elements of its diet. The samples were analysed for Hg and its labile and stable forms, using the thermodesorption method. The results showed that the level of total Hg in zoobenthos was associated with dietary preferences and the share of bioavailable Hg in its food. The Hg fractionation in the macrofauna was conditioned by biological features (morphological structure) and environmental parameters (oxygenation, pH) which shape the mobility and assimilation of Hg. The absorption of the most toxic organic Hg in macrofauna was more effective in aerobic conditions, at low primary production and with the limited inflow of organic matter. The trophic transfer of Hg was favoured by the limited biomass of primary producers, and consequently of zoobenthos. An important factor influencing the biomagnification was also the share of labile Hg in macrozoobenthos.
本研究在波罗的海南部沿海地区进行。研究材料包括大型底栖动物及其食物元素。使用热脱附法分析了 Hg 及其可利用和稳定形态。结果表明，底栖动物中总 Hg 的水平与其饮食偏好和其食物中可利用 Hg 的份额有关。在大型动物群中，Hg 的分馏受生物特征（形态结构）和环境参数（氧化、pH 值）的影响，这些参数影响 Hg 的迁移和同化。在低初级生产力和有机物有限流入的情况下，在需氧条件下，有机 Hg 的最有毒形式在大型动物群中的吸收更有效。Hg 的营养转移受到初级生产者生物量有限的影响，进而影响底栖动物的生物量。影响生物放大的一个重要因素也是大型底栖动物中可利用 Hg 的份额。
