| determination of lead in samples of zooplankton, water, and sediments in a mexican reservoir: evidence for lead biomagnification in lower/intermediate trophic levels? | we have determined lead concentration of water, sediment, and zooplankton samples of el niágara, 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 spec ... | 2008 | 18214885 |