Methyl parathion impact on water, sediments and benthic macroinvertebrates from the ignacio Ramirez dam, Mexico

Autor:	Marina Y. de la Vega‐Salazar, Edmundo Díaz‐Pardo, Laura Martínez‐Tabche, Constantino Macías-Garcia
Rok vydání:	1999
Předmět:	biology Ecology Health Toxicology and Mutagenesis Daphnia magna Sediment biology.organism_classification Pollution chemistry.chemical_compound chemistry Benthic zone Aphotic zone Bioaccumulation Parathion methyl Environmental Chemistry Environmental science Turbidity Bioindicator
Zdroj:	Toxicological & Environmental Chemistry. 71:81-93
ISSN:	1029-0486 0277-2248
Popis:	Water, sediment and macrobenthic invertebrates were sampled at Ignacio Ramirez dam (IRD) in Mexico, aimed to determine whether the insecticide Methyl parathion (MP) is concentrated. We investigated how factors like low pH or high turbidity, may prevent its degradation and favor the accumulation in water, sediment and organisms, and/or produce a toxic effect in fresh‐water organisms. MP and 4‐nitrophenol (4‐NP) are accumulated in water, sediment and benthic organisms. During the dry season MP can be degraded and the metabolite can be eliminated from the sediment during the rainy season. MP and 4‐NP concentrations show a negative correlation with pH in sediment and a positive correlation with depth of the aphotic zone. This factors are largely correlated with accumulation and persistence of MP and 4‐NP in sediment. Sediment of IRD shows a sublethal and genotoxic effects in bioindicators. MP and 4‐NP concentrations in water and sediment have a direct effect in the diversity of macrobenthic communities.
Databáze:	OpenAIRE
Externí odkaz:	https://explore.openaire.eu/search/publication?articleId=doi_________::d0d52c62dbe16a184c6ceb38f805f88f https://doi.org/10.1080/02772249909358783 Zobrazit plný text záznamu