Persistent organic pollutants in krill from the Bellingshausen, South Scotia, and Weddell Seas

Cristóbal J. Galbán-Malagón, Gema Hernán, Esteban Abad, Jordi Dachs

Resultado de la investigación: Research - revisión exhaustivaArticle

Resumen

Persistent organic pollutants (POPs) reach Antarctica through atmospheric transport, oceanic currents, and to minor extent, by migratory animals. The Southern Ocean is a net sink for many POPs, with a key contribution of the settling fluxes of POPs bound to organic matter (biological pump). However, little is known about POP transfer through the food web in the Southern Ocean and Antarctic waters, where krill is an important ecological node. In this study, we assessed the occurrence of polychlorinated dibenzo-p-dioxins and furans (PCDD/Fs), polybrominated diphenyl ethers (PBDEs), and polychlorinated biphenyls (PCBs) in Antarctic krill (Euphausia superba) from the Bellingshausen, South Scotia and Weddell Seas around the Antarctic Peninsula. The concentrations of PCDD/Fs, PBDEs and PCBs in krill showed a large variability and the average were higher (generally within a factor 3) than those previously reported for eastern Antarctica. This result highlights regional differences related to atmospheric transport and deposition, and also probable regional sources due to human activities. Bioaccumulation and biomagnification factors for PCBs in krill were estimated using previously reported phytoplankton and seawater concentrations for this region. These suggested a near water-krill equilibrium for PCBs, which was not observed for water-phytoplankton partitioning. The estimated removal settling fluxes of PCBs due to the biological pump were several orders of magnitude higher than the estimated fluxes of PCBs transferred from phytoplankton to krill.

IdiomaEnglish
Páginas1487-1495
Número de páginas9
PublicaciónScience of the Total Environment
Volumen610-611
DOI
EstadoPublished - 1 ene 2018

Huella dactilar

PCB
sea
persistent organic pollutant
Organic pollutants
Polychlorinated Biphenyls
Polychlorinated biphenyls
phytoplankton
water
Phytoplankton
Fluxes
Water
biological pump
furan
atmospheric transport
PBDE
dioxin
ocean
Antarctica
Halogenated Diphenyl Ethers
Furans

Keywords

    ASJC Scopus subject areas

    • Environmental Engineering
    • Environmental Chemistry
    • Waste Management and Disposal
    • Pollution

    Citar esto

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    Persistent organic pollutants in krill from the Bellingshausen, South Scotia, and Weddell Seas. / Galbán-Malagón, Cristóbal J.; Hernán, Gema; Abad, Esteban; Dachs, Jordi.

    En: Science of the Total Environment, Vol. 610-611, 01.01.2018, p. 1487-1495.

    Resultado de la investigación: Research - revisión exhaustivaArticle

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    AU - Galbán-Malagón,Cristóbal J.

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    AU - Abad,Esteban

    AU - Dachs,Jordi

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    KW - Antarctica

    KW - Biological pump

    KW - Cycling

    KW - Krill

    KW - Phytoplankton

    KW - POPs

    KW - Southern Ocean

    KW - Water

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