Effect of coexposure to DDT and manganese on freshwater invertebrates: Pore water from contaminated rivers and laboratory studies

An environmental survey of several rivers of the southern Huasteca area of Mexico revealed high concentrations of manganese (Mn) and the presence of DDT in the sediments and pore water. Therefore, acute (48‐h) toxicities of Mn and DDT were assessed both independently and as a combination on 24‐h‐old...

Full description

Saved in:
Bibliographic Details
Published in:Environmental toxicology and chemistry 2005-08, Vol.24 (8), p.2037-2044
Main Authors: Mejía-Saavedra, Jesús, Sánchez-Armass, Sergio, Santos-Medrano, Gustavo E., Gonzáaaalez-Amaro, Roberto, Razo-Soto, Israel, Rico-Martínez, Roberto, Díaz-Barriga, Fernando
Format: Article
Language:English
Subjects:
Animal and plant ecology
Animal, plant and microbial ecology
Animals
Applied ecology
Biological and medical sciences
Daphnia magna
DDT - toxicity
Dichlorodiphenylthrichloroethane
Ecotoxicology, biological effects of pollution
Environmental surveys
Fresh water ecosystems
Freshwater
Freshwater ecology
Freshwater invertebrates
Fundamental and applied biological sciences. Psychology
General aspects
Insecticides
Invertebrata
Invertebrate acute toxicity
Invertebrates
Invertebrates - drug effects
Lecane quadridentata
Manganese
Manganese - toxicity
Manganese compounds
Neonates
Particle Size
Pore water
Rivers
Synecology
Toxicant coexposure
Toxicants
Toxicity
Water Pollutants, Chemical - toxicity
Water pollution
Citations: Items that this one cites
Items that cite this one
Online Access:Get full text
Tags: Add Tag
No Tags, Be the first to tag this record!
Description
Summary:An environmental survey of several rivers of the southern Huasteca area of Mexico revealed high concentrations of manganese (Mn) and the presence of DDT in the sediments and pore water. Therefore, acute (48‐h) toxicities of Mn and DDT were assessed both independently and as a combination on 24‐h‐old neonates of Daphnia magna Strauss and Lecane quadridentata Ehrenberg. Daphnia magna showed high sensitivity to both toxicants, whereas L. quadridentata was highly resistant to DDT and less susceptible to Mn. For D. magna, the Mn and DDT coexposure was significantly more toxic than any of the singly tested compounds. When D. magna was exposed to sediment pore water, no association was found between the Mn content in the samples and the observed toxicity. Preliminary particle analysis of pore water showed different compounds of Mn, which apparently were not in bioavailable form.
ISSN:0730-7268
1552-8618
DOI:10.1897/04-438R.1