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Updated: Mar 27, 2026

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Published on: April 19, 2018
Elemental composition of Usnea sp lichen from Potter Peninsula, 25 de Mayo (King George) Island, Antarctica
Débora Bubach1, Soledad Perez Catán1, Carla Di Fonzo2
1Laboratorio de Análisis por Activación Neutrónica, Centro Atómico Bariloche (CAB), Comisión Nacional de Energía Atómica (CNEA), Av. Bustillo km 9.5, (8400) Bariloche, Argentina.
Abstract:
Several pollutants, which include metals, are present in the Antarctic atmosphere, snow, marine and terrestrial organisms. This work reports the elements incorporated by Usnea sp thalli in Potter Peninsula, 25 de Mayo (King George) Island, South Shetlands, Antarctica. Geological origin was analyzed as possible sources of elements. For this purpose, correlations were done using a geochemical tracer, principal component analysis and enrichment factors were computed. Lithophile elements from particulate matter were present in most of the sampling sites. Bromine, Se and Hg showed the highest enrichment factors suggesting other sources than the particulate matter. Mercury values found in Usnea sp were in the same range as those reported for Deception Island (South Shetlands) and remote areas from the Patagonia Andes.
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