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Pollution levels and biomarker responses in zooplankton from three hydrographic regions of southern Brazil: An integrated approach for water quality monitoring.
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- Author(s): Zebral, Yuri Dornelles; Righi, Bruna Duarte Pereira; Anni, Iuri Salim Abou; Escarrone, Ana Laura Venquiaruti; Roza, Mauricio; Vieira, Carlos Eduardo Delfino; Costa, Patrícia Gomes; Bianchini, Adalto
- Source:
Journal of Environmental Chemical Engineering; Oct2021, Vol. 9 Issue 5, pN.PAG-N.PAG, 1p- Subject Terms:
- Source:
- Additional Information
- Subject Terms:
- Abstract: Levels of chemical pollutants [organochlorine pesticides (OCs), current-use pesticides (CUPs), polycyclic aromatic hydrocarbons (PAHs) and trace-metals (Cu, Pb, Zn and Cd)], and biomarkers [metallothioneins (MTs) and lipid peroxidation (LPO)] were assessed in zooplankton of four watersheds belonging to three different hydrographic regions in southern Brazil. Results show that bioaccumulation followed a geographical pattern, as zooplankton from more coastal areas were the less affected. Elevated levels of CUPs (3257–6360 ng/g) and DDTs (1648–3258 ng/g) were found in zooplankton collected in sampling sites located in agricultural areas. In turn, elevated levels of HCHs (419–488 ng/g), endosulfans (108–215 ng/g) and PAHs (82,408–151,400 ng/g) were found in zooplankton collected in areas characterized by agricultural and industrial activities. Importantly, already banned pesticides were also detected, thus raising concerns. Regarding biomarkers, MTs and LPO levels were positively related with pollutant concentration in zooplankton from all assessed areas. This finding points out the suitability of both MTs and LPO as biological tools for environmental monitoring programs. Also, it is important to note that zooplankton is a major component of the first lfevel of consumers in aquatic system food chains. Therefore, chemical pollutants accumulated in zooplankton are likely to be biomagnified along the higher levels of the food chain, thus raising great concern. Therefore, the present study indicates MTs and LPO as suitable tools to predict ecological impacts in aquatic systems, using zooplankton was biomonitor species. [Display omitted] • Elevated CUPs and DDTs were found in zooplankton collected in agricultural areas. • Elevated HCHs, endosulfans and PAHs were found in agricultural and industrial areas. • Already banned pesticides were detected in zooplankton. • LPO was positively correlated with pollutants with r ranging from 0.3 to 0.6. • MTs and LPO in zooplankton are suitable biomarkers to predict ecological impacts. [ABSTRACT FROM AUTHOR]
- Abstract: Copyright of Journal of Environmental Chemical Engineering is the property of Elsevier B.V. and its content may not be copied or emailed to multiple sites or posted to a listserv without the copyright holder's express written permission. However, users may print, download, or email articles for individual use. This abstract may be abridged. No warranty is given about the accuracy of the copy. Users should refer to the original published version of the material for the full abstract. (Copyright applies to all Abstracts.)
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