NDLI: Pollution effects on biochemical pathways determined in the polychaete <i>Hediste diversicolor</i> collected in three Portuguese estuaries

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Environmental Science: Processes & Impacts Vol - 18 Issue - 8

Environmental Science: Processes & Impacts Vol - 18 Issue - 7

Environmental Science: Processes & Impacts Vol - 18 Issue - 6

Environmental Science: Processes & Impacts Vol - 18 Issue - 5

Pollution effects on biochemical pathways determined in the polychaete Hediste diversicolor collected in three Portuguese estuaries

Content Provider	Royal Society of Chemistry (RSC)
Author	Barbosa, I. Nunes, B. Soares, A. M. V. M. Freitas, R. Vidal, D.
Copyright Year	2016
Abstract	Biomonitoring is an important tool for the assessment of the quality and functions of ecosystems, providing information about the pollutants present and the direct effects that they exert on organisms. Biomonitoring relies upon the quantification of variables that can be biochemical, genetic, morphological and physiological changes. Such variables are designated as biomarkers, and multiple biomarkers are usually determined simultaneously in order to have a more integrated analysis and information about sublethal early effects of contaminants. In this work, we quantified biomarkers, associated with oxidative stress (glutathione-S-transferases GSTs, and catalase CAT, activities; levels of peroxidative alterations, by the thiobarbituric acid reactive substances assay, TBARS) and neurotoxicity (acetylcholinesterase activity, AChE) in the polychaete Hediste diversicolor. Organisms were collected at three distinct estuaries, Ria de Aveiro (Laranjo and São Jacinto), Douro River (São Paio, Afurada, and Ribeira da Granja), both impacted by human activities, and Minho River (Seixas), which has been used as a reference site. Obtained data showed the occurrence of anti-oxidant responses, in most samples from contaminated sites, which was not followed however by the occurrence of oxidative damage in organisms from Ria de Aveiro. None of the analyzed organisms had significant impairment of cholinesterasic activity, suggesting the absence of a prior exposure to neurotoxic compounds. In fact, organisms collected at Ria de Aveiro had largely increased AChE activity, suggesting an uncommon paradoxical biological response that is further discussed.
Starting Page	1208
Ending Page	1219
Page Count	12
File Format	HTM / HTML PDF
ISSN	20507887
Volume Number	18
Issue Number	9
Journal	Environmental Science: Processes & Impacts
DOI	10.1039/c6em00297h
Language	English
Publisher	Royal Society of Chemistry
Access Restriction	Open
Subject Keyword	Ria de Aveiro Laranjo Ribeira da Granja Seixas o Jacinto Douro River o Paio Minho River Biomonitoring Oxidative stress Catalase Acid Lipid peroxidation Neurotoxicity Acetylcholinesterase Polychaete Estuary Aveiro Lagoon São Jacinto Douro São Paio (Melgaço) Minho (river)
Content Type	Text
Resource Type	Article
Subject	Environmental Chemistry Public Health, Environmental and Occupational Health Management, Monitoring, Policy and Law

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