Trophic distribution of Cd, Pb, and Zn in a food web from Altata-Ensenada del Pabellón Subtropical Lagoon, SE Gulf of California.
The aim of the work was to obtain a comparative view of the trophic distribution of Cd, Pb, and Zn in different organisms of the food web (from primary producers to top predators), considering representative species in Altata-Ensenada del Pabellón subtropical lagoon (SE Gulf of California). The study provides the first quantitative information on the biotransference of Cd, Pb, and Zn in a moderately contaminated lagoon ecosystem. After examination of 31 trophic interactions, 20 cases resulted in transference factors (TF) > 1.0 for Cd, 14 cases for Pb, and 18 cases for Zn. For Cd, most of the TF > 1 were found mainly among the low trophic levels (15 of 20 links); for Pb, most of the TF > 1 were found mainly among the high trophic levels (11 of 14 links), and for Zn, most of the TF > 1 were found mainly among the low trophic levels (14 of 18 links). This can be interpreted as partial evidence of biomagnification of Cd, Pb, and Zn for the species involved.
Ruelas-Inzunza
J
J
Technological Institute of Mazatlán/Environmental Section, P.O. Box 757, Mazatlán, 82000, Sinaloa, Mexico.
Páez-Osuna
F
F
D000818:Animals; D001711:Biotransformation; D001717:Birds / Q000378:metabolism; D017753:Ecosystem; D004781:Environmental Exposure; D056890:Eukaryota / Q000737:chemistry / Q000378:metabolism; D005399:Fishes / Q000378:metabolism; D020387:Food Chain; D005618:Fresh Water / Q000737:chemistry*; D019216:Metals, Heavy / Q000032:analysis / Q000378:metabolism*; D008800:Mexico; D033561:Penaeidae / Q000737:chemistry / Q000378:metabolism; D012758:Shellfish; D014874:Water Pollutants, Chemical / Q000032:analysis / Q000378:metabolism*
D019216:Metals, Heavy; D014874:Water Pollutants, Chemical