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Yogui, G. T./ J. L. Sericano/ R. C. Montone 2011: Accumulation of semivolatile organic compounds in Antarctic vegetation: A case study of polybrominated diphenyl ethers. - Science of the Total Environment 409(19): 3902-3908. [RLL List # 224 / Rec.# 33191]
Keywords: Depositional processes/ Lichen/ Long-range atmospheric transport/ Moss/ PBDE/ Persistent organic pollutant/ Depositional processes/ Lichen/ Long-range atmospheric transport/ Moss/ PBDE/ Persistent organic pollutants/ Atmospheric movements/ Computer simulation/ Ethers/ Vegetation/ Organic pollutants/ polybrominated diphenyl ether/ atmospheric transport/ bioaccumulation/ computer simulation/ lichen/ long range transport/ moss/ organic compound/ organic pollutant/ PBDE/ vegetation dynamics/ wet deposition/ Antarctica/ article/ atmosphere/ chemical analysis/ environmental factor/ environmental parameters/ lichen/ lichens/ moss/ organic pollution/ physical chemistry/ precipitation/ priority journal/ quality control/ secondary organic aerosol/ simulation/ summer/ vegetation/ wet deposition/ Antarctica/ King George Island/ South Shetland Islands/ Bryophyta/ Tetra
Abstract: Antarctic plant communities are dominated by lichens and mosses which accumulate semivolatile organic compounds (SOCs) such as polybrominated diphenyl ethers (PBDEs) directly from the atmosphere. Differences in the levels of PBDEs observed in lichens and mosses collected at King George Island in the austral summers 2004-05 and 2005-06 are probably explained by environmental and/or plant parameters. Contamination of lichens showed a positive correlation with local precipitation, suggesting that wet deposition processes are a major mechanism controlling the uptake of most PBDE congeners. These findings are in agreement with physical-chemical data supporting that tetra- through hepta-BDEs in the Antarctic atmosphere are basically bound to aerosols. Conversely, accumulation of PBDEs in mosses appears to be controlled by other environmental factors and/or plant-specific characteristics. Model simulations demonstrated that an ocean-atmosphere coupling may have played a role in the long-range transport of less volatile SOCs such as PBDEs to Antarctica. According to simulations, the atmosphere is the most important transport medium for PBDEs while the surface ocean serves as a temporary storage compartment, boosting the deposition/volatilization "hopping" effect similarly to vegetation on continents. © 2011 Elsevier B.V.
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