4.3 Article

Influence of different seabird species on trace metals content in Antarctic soils

Journal

ANAIS DA ACADEMIA BRASILEIRA DE CIENCIAS
Volume 94, Issue -, Pages -

Publisher

ACAD BRASILEIRA DE CIENCIAS
DOI: 10.1590/0001-3765202220210623

Keywords

biotransportation; contamination; extractors; mercury; ornithogenic soils; heavy metals

Funding

  1. Coordenacao de Aperfeicoamento de Pessoal de Nivel Superior - Brazil (CAPES) [001]
  2. Conselho Nacional de Desenvolvimento Cientifico e Tecnologico (CNPq)

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The behavior and feeding habits of different species of seabirds can influence the enrichment of trace metals in Antarctic soils. This study found that the concentrations of Cr and Hg in the soil were positively correlated with P, TOC, and TN, indicating the biotransport of these metals by seabirds. Soils influenced by penguins showed higher levels of P, TOC, TN, Cr, and Hg.
The behavior and feeding habits of different species of seabirds can influence the enrichment of trace metals in Antarctic soils. This study aimed to evaluate the influence of different species of seabirds on the concentrations of potentially toxic metals in Antarctic soils. For this, we collected soil samples in areas influenced by penguins, kelp gulls, and giant petrels. We analyzed the concentration of total organic carbon (TOC), total nitrogen (TN), available phosphorus (P) and metals by three different methods of extraction: USEPA 3051A, Mehlich-1, and distilled water. The concentrations of Cr and Hg presented positive correlations with P, TOC, and TN by the USEPA 3051A method, indicating the biotransport of these metals by seabirds. Soils influenced by penguins showed higher levels of P, TOC, TN, Cr, and Hg. Comparing the results from the different extractors, we found that Hg had the highest relative levels in the exchangeable fraction and the soil solution. Therefore, the soils with the influence of penguins present higher levels of biotransported trace metals, but this does not necessarily mean that these birds have a higher biotransport potential, since the concentration of trace metals in these soils may be related to their degree of ornithogenesis.

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