Mercury transfer in a subtropical coastal lagoon food web (SE Gulf of California) under two contrasting climatic conditions
Por:
Jara-Marini M.E., Soto-Jiménez M.F., Páez-Osuna F.
Publicada:
1 sep 2012
Resumen:
Mercury (Hg) transference through an established and defined food web from an urbanized subtropical coastal lagoon (SE Gulf of California) was examined by using carbon and nitrogen stable isotope and Hg analyses. Concentrations of Hg in seawater (0.0450.078 mu g L-1), predominantly incorporated to the particulate fraction (60% of total), were lower than those found in highly contaminated coastal areas around the world (0.1816 mu g L-1). Although levels of Hg available for the biota (e.g., associated to the reactive and pyrite fractions; 0.110.15 mu g g-1) were within of effects range-low (ER-L, 0.150.71 mu g g-1) these concentrations represented from 46.6 to 67.0% of the total Hg pool that may be transferred through food web. The sequence of bio-accumulation of Hg in studied species was according with their functional guild: tertiary consumer (0.851.15 mu g g-1) > secondary consumers (0.0840.168 mu g g-1) > primary consumers (0.0140.160 mu g g-1) > primary producers (0.0160.056 mu g g-
Filiaciones:
Jara-Marini M.E.:
Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Programa Posgrado Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, Mexico
Soto-Jiménez M.F.:
Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, Mexico
Páez-Osuna F.:
Univ Nacl Autonoma Mexico, Unidad Acad Mazatlan, Inst Ciencias Mar & Limnol, Mazatlan 82000, Sinaloa, Mexico
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