Artículos de revistas
Baseline concentrations of faecal sterols and assessment of sewage inputinto different inlets of Admiralty Bay, King George Island, Antarctica
Fecha
2014Registro en:
Marine Pollution Bulletin, v.78, p.218-223,2014
Autor
Martins, César de Castro
Aguiar, Sabrina N
Wisnieski, Edna
Ceschim, Liziane Marcella Michelotti
Figueira, Rubens Cesar Lopes
Montone, Rosalinda Carmela
Institución
Resumen
The Antarctic region is one of the best preserved environments in the world. However, human activities such as the input of sewage result in the alteration of this pristine site. We report baseline values of faecal sterols in Admiralty Bay, Antarctica. Four sediment cores were collected during the 2006/2007 austral summer at the Ezcurra (THP and BAR), Mackelar (REF) and Martel (BTP) inlets. Concentrations of faecal sterols (coprostanol + epicoprostanol) were <0.16 lg g_1, suggesting no sewage contamination and probable ‘‘biogenic’’ contributions for these compounds. Baseline values, calculated using the mean
concentration of faecal sterols in core layers for THP, BAR, REF and BTP, were 0.04 } 0.02, 0.03 } 0.01, 0.07 } 0.01 and 0.04 } 0.02 lg g_1, respectively. These results established as natural contributions of faecal sterols, suggesting that these markers can be useful indicators of human-derived faecal inputand contributing to monitoring programs to prevent anthropogenic impacts.