Distribution of 137Cs in the marine environment from King George Island (Southern Shetlands, maritime Antarctica)

Distribution of 137Cs in the marine environment from King George Island (Southern Shetlands, maritime Antarctica)

The article presents data on the activity of the radionuclide 137Cs in seawater, sediment, macroalgae, and zoobenthos from different locations in Admiralty Bay, King George Island, maritime Antarctica. The activity of 137Cs in the macrophytobenthos remained relatively stable across species, oscillat...

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Veröffentlicht in:Marine pollution bulletin 2023-12, Vol.197, p.115752-115752, Article 115752
Hauptverfasser: Saniewski, Michał, Balazy, Piotr, Klajman, Kamila, Saniewska, Dominika
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container_title Marine pollution bulletin
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creator Saniewski, Michał
Balazy, Piotr
Klajman, Kamila
Saniewska, Dominika
description The article presents data on the activity of the radionuclide 137Cs in seawater, sediment, macroalgae, and zoobenthos from different locations in Admiralty Bay, King George Island, maritime Antarctica. The activity of 137Cs in the macrophytobenthos remained relatively stable across species, oscillating at the level of 1 Bq kg-1dw. However, a few individuals exhibited higher activity, particularly at stations closer to the glacier front. This result could have been caused by specific conditions resulting from melting glaciers and meltwater inflow and mixing with oceanic water. The activities of 137Cs in zoobenthic were in the range from 0.12 Bq kg-1dw (Asteroidea) to 24.2 Bq kg-1dw (Porifera) and the total doses in marine species were several orders of magnitude lower than reference levels. Stable isotopes of δ13C and δ15N suggest that the main factor influencing 137Cs activity may be the source of carbon (marine vs. terrestrial/glacial), rather than feeding strategy or trophic niches.
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title Distribution of 137Cs in the marine environment from King George Island (Southern Shetlands, maritime Antarctica)
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