Turbidity mitigates lead toxicity to cladocerans (Cladocera).

Ecotoxicology
Gerardo García-GarcíaS S S Sarma

Abstract

To test the hypothesis that sediment would have a synergistic effect on the toxicity of lead to cladocerans, we performed life table demography experiments with two pelagic (Diaphanosoma birgei and Moina micrura) and one littoral (Alona rectangula) cladoceran species. Life table demography experiments were conducted at three levels of turbidity (0, 17 and 170 NTU) and six concentrations of lead (as PbCl2) from 0 to 0.71 mg l(-1). Median lethal concentrations (LC50) forA. rectangula, D. birgei and M. micrura were 7.06 +/- 0.39, 3.16 +/- 0.25 and 3.24 +/- 0.69 mg l(-1) of Pb. Life table study showed that in general, the presence of sediments in test jars allowed an overall increase of 20-75% in both survivorship and reproduction of the cladoceran species exposed to different concentrations of Pb. At 0.04 mg l(-1) of Pb, the population growth rates were 0.127 forA. rectangula, 0.037 for D. birgei and 0.471 d(-1) for M. micrura in the absence of sediments but were elevated in their presence (0.309, 0.141 and 0.722 d(-1), respectively). The data have been discussed in relation to their importance in shallow, turbid Mexican waterbodies.

References

Oct 1, 1983·Ecotoxicology and Environmental Safety·K H KnollW Schneider
Jul 1, 1996·Bulletin of Environmental Contamination and Toxicology·I De GregoriA Vidal
Jun 18, 2003·Critical Reviews in Toxicology·Edward J Calabrese, Linda A Baldwin
Apr 16, 2004·Journal of Environmental Management·S NandiniPedro Ramírez-García
Jun 18, 2004·Bulletin of Environmental Contamination and Toxicology·G G GarcíaS S S Sarma

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Citations

Nov 7, 2008·Archives of Environmental Contamination and Toxicology·Zaosheng WangYijun Yan
Sep 14, 2010·Ecotoxicology and Environmental Safety·Isabel LopesRui Ribeiro
Nov 22, 2015·Environmental Toxicology and Chemistry·Patrick A Van SprangKarel A C De Schamphelaere
Mar 17, 2007·Journal of Environmental Science and Health. Part A, Toxic/hazardous Substances & Environmental Engineering·Aramen Iván Montúfar-MeléndezS Nandini
Feb 12, 2017·Bulletin of Environmental Contamination and Toxicology·G García-GarcíaS S S Sarma

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