2026-04-29T10:59:12Zhttps://uvadoc.uva.es/oai/requestoai:uvadoc.uva.es:10324/651572025-09-05T10:34:45Zcom_10324_1173com_10324_931com_10324_894col_10324_1371
UVaDOC
author
Cabrerizo Pastor, Ana
author
Tejedo, Pablo
author
Dachs, Jordi
author
Benayas, Javier
2024-01-29T06:34:43Z
2024-01-29T06:34:43Z
2016
Science of the Total Environment, November 2016, vol. 569-570, p. 1500-1509
0048-9697
https://uvadoc.uva.es/handle/10324/65157
10.1016/j.scitotenv.2016.06.240
1500
1509
Science of The Total Environment
569-570
Two Antarctic expeditions (in 2009 and 2011) were carried out to assess the local and remote anthropogenic sources of aliphatic and aromatic hydrocarbons, as well as potential biogenic hydrocarbons. Polycyclic aromatic hydrocarbons (PAHs), n-alkanes, biomarkers such as phytane (Ph) and pristane (Pr), and the aliphatic unresolved complex mixture (UCM), were analysed in soil and vegetation samples collected at Deception, Livingston, Barrientos and Penguin Islands (South Shetland Islands, Antarctica). Overall, the patterns of n-alkanes in lichens, mosses and grass were dominated by odd-over-even carbon number alkanes. Mosses and vascular plants showed high abundances of n-C21 to n-C35, while lichens also showed high abundances of n-C17 and n-C19. The lipid content was an important factor controlling the concentrations of n-alkanes in Antarctic vegetation (r2 = 0.28–0.53, p-level < 0.05). n-C12 to n-C35 n-alkanes were analysed in soils with a predominance of odd C number n-alkanes (n-C25, n-C27, n-C29, and n-C31), especially in the background soils not influenced by anthropogenic sources. The large values for the carbon predominance index (CPI) and the correlations between odd alkanes and some PAHs suggest the potential biogenic sources of these hydrocarbons in Antarctica. Unresolved complex mixture and CPI values ~ 1 detected at soils collected at intertidal areas and within the perimeter of Juan Carlos research station, further supported the evidence that even a small settlement (20 persons during the austral summer) can affect the loading of aliphatic and aromatic hydrocarbons in nearby soils. Nevertheless, the assessment of Pr/n-C17 and Ph/n-C18 ratios showed that hydrocarbon degradation is occurring in these soils
eng
Anthropogenic and biogenic hydrocarbons in soils and vegetation from the South Shetland Islands (Antarctica)
info:eu-repo/semantics/article
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https://uvadoc.uva.es/bitstream/10324/65157/1/Cabrerizo%20et%20al%202016.pdf
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Cabrerizo et al 2016.pdf