RT Conference Proceedings
T1 Radionuclides in arctic marine macroalgae from Kongsfjorden (Svalbard)
A1 Gordo Puertas, Elisa
A1 Cañete-Hidalgo, Sergio Andrés
A1 Dueñas-Buey, Mª Concepción
A1 López-Gordillo, Francisco Javier
A1 Carmona-Fernández, Raquel
A1 Liger-Pérez, Esperanza
A1 Pastor-Vega, José Manuel
A1 Pérez-Martínez, Manuel
A1 Ruiz-Cruces, Rafael
K1 Algas - Regiones árticas
K1 Isótopos radioactivos
AB Seaweeds are known to be useful environmental bioindicators since they bioaccumulate radioisotopes atvery low environmental concentrations. Levels of natural radionuclides in six ecologically relevant brownand red seaweed species from Arctic coasts (Kongsfjorden, Spitsbergen, Svalbard Islands) were analysedin the present study, in order to characterise the levels of natural radioactivity in this ecosystem and tocompare this with previously published data in coastal areas from other latitudes. Thalli were collected bySCUBA divers at different depths in Hansneset in September 2014 and transported immediately to thelaboratory. Young thalli, free from macroscopic epibiota, were dried, powdered and confined in a standardgeometry before gamma spectrometry measurements. Then, the radioactivity of 7Be, 40K, 208Tl, 210Pb, 212Pb,226Ra and 228Ra was measured by high-resolution gamma spectrometry using high-purity germaniumdetectors for 172800 s. Detectors were calibrated using a traceable multi gamma standard source and resultsare on a dry weight and fresh weight basis and are decay corrected to the date of sampling. Our resultsrevealed the influence of cosmogenic radionuclides in the intertidal zone, as shown by the unique presenceof 7Be in the brown macroalga Fucus distichus, the only analysed species inhabiting the intertidal. Highconcentrations of 40K were observed in all species, as this is one of the essential elements in biota.Remarkably is the high content of 210Pb in the red seaweeds Phycodrys rubens and Ptilota gunneri,suggesting that these species might possess a higher capacity for heavy metals bioaccumulation than theanalysed brown seaweeds.
YR 2018
FD 2018-05-11
LK https://hdl.handle.net/10630/15694
UL https://hdl.handle.net/10630/15694
LA eng
DS RIUMA. Repositorio Institucional de la Universidad de Málaga
RD 20 ene 2026