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HERO ID
516438
Reference Type
Journal Article
Title
Determination of lead in samples of zooplankton, water, and sediments in a Mexican reservoir: Evidence for lead biomagnification in lower/intermediate trophic levels?
Author(s)
Rubio-Franchini, I; Saavedra, JM; Rico-Martinez, R
Year
2008
Is Peer Reviewed?
Yes
Journal
Environmental Toxicology
ISSN:
1520-4081
EISSN:
1522-7278
Volume
23
Issue
4
Page Numbers
459-465
Language
English
PMID
18214885
DOI
10.1002/tox.20357
Web of Science Id
BCI:BCI200800660984
Abstract
We have determined lead concentration of water, sediment, and zooplankton samples of El Niagara, a reservoir in Aguascalientes, Mexico. Our results include the first report of bioconcentration factor (BCF) obtained in an actual ecosystem (as opposed to the experimental setups in the laboratory) for a rotifer species; Asplanchna brigthwellii (BCF ca. 49 300). The BCF of this predatory zooplanktonic species (A. brigthwellii) are up to four times greater than those of two grazing zooplanktonic species (Daphnia similis and Moina micrura). In this contaminated reservoir that lacks fishes, Asplanchna, and Culex sp. together with ducks and other bigger invertebrates might represent the top predators. Our data suggest that biomagnification of lead through at least one trophic level can occur in freshwater systems. Biomagnification in A. brigthwellii might be explained in part by predation of this voracious predator on young of the herbivorous cladoceran, M. micrura. Our findings stand opposite to the current theoretical framework where lead biomagnification occurs only in lower trophic levels. (C) 2008 Wiley Periodicals, Inc.
Keywords
metal toxicity; bioconcentration factors; heavy metal toxicity; lead; accumulation; brachionus-calyciflorus; food-web; bioaccumulation; toxicity; aguascalientes; accumulation; metals; lakes
Tags
IRIS
•
Trimethylbenzenes (TMB)
NAAQS
•
ISA-Lead (2013 Final Project Page)
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