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The non-selective Antarctic filter feeder Salpa thompsoni as a bioindicator of mercury origin
Wojdasiewicz, A.; Panasiuk, A.; Beldowska, M. (2024). The non-selective Antarctic filter feeder Salpa thompsoni as a bioindicator of mercury origin. NPG Scientific Reports 14(1): 2245. https://dx.doi.org/10.1038/s41598-024-52770-5
In: Scientific Reports (Nature Publishing Group). Nature Publishing Group: London. ISSN 2045-2322; e-ISSN 2045-2322
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Salpa thompsoni Foxton, 1961 [WoRMS]
Marien/Kust |
| Auteurs | | Top |
- Wojdasiewicz, A.
- Panasiuk, A.
- Beldowska, M.
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| Abstract |
Hg is considered as the most toxic metal in the environment. Sources of Hg in the environment include burning fossil fuels, burning waste, and forest fires. The long residence time of the gaseous form in the atmosphere allows mercury to be transported over long distances. The pelagic tunicate Salpa thompsoni is an important component of the Antarctic environment. Over the past few decades an expansion of this species to the higher latitudes has been noted, mainly due to the ongoing climate change. The study material consisted of samples of S. thompsoni individuals, collected in the waters surrounding Elephant Island (Western Antarctic). Total mercury and five of its fractions were determined. Whole organisms were analyzed as well as internal organs: stomachs, muscle strips, and tunics. Obtained results showed that the highest concentrations of mercury in salps were observed in stomachs. With the Hg fraction results, it can be concluded that the main route of exposure of S. thompsoni to Hg is presumably absorption from the food—filtered organic and non-organic particles. Moreover, the process of transformation of simple soluble forms into organic forms of Hg in stomachs and intestines and its distribution to other tissues was observed. |
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