Contamination and Toxicity of Surface Waters Along Rural and Urban Regions of the Capibaribe River in Tropical Northeastern Brazil.
Autor: | Alves RN; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil., Mariz CF Jr; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil., de Melo Alves MK; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil., Cavalcanti MGN; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil., de Melo TJB; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil., de Arruda-Santos RH; Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR), Centro de Tecnologia e Geociências, Federal University of Pernambuco, Recife, Brazil., Zanardi-Lamardo E; Laboratório de Compostos Orgânicos em Ecossistemas Costeiros e Marinhos (OrganoMAR), Centro de Tecnologia e Geociências, Federal University of Pernambuco, Recife, Brazil., Carvalho PSM; Laboratório de Ecotoxicologia Aquática, Centro de Biociências, Federal University of Pernambuco, Recife, Brazil. |
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Jazyk: | angličtina |
Zdroj: | Environmental toxicology and chemistry [Environ Toxicol Chem] 2021 Nov; Vol. 40 (11), pp. 3063-3077. Date of Electronic Publication: 2021 Sep 24. |
DOI: | 10.1002/etc.5180 |
Abstrakt: | The Capibaribe River provides water to a population of 1.7 million people in the Brazilian northeast, while receiving agricultural runoff and industrial and domestic effluents along its 280 km. The present study evaluated the ecotoxicity of surface waters along ten sites in rural and urban areas using zebrafish (Danio rerio) early-life stages and related it to water quality indices and chemical abiotic variables. Lethality rates, delays in embryo-larval development quantified by the general morphology score (GMS), and frequencies of developmental abnormalities were analyzed. A correlation was detected between zebrafish GMS and water quality index (WQI), sensitivity to domestic sewage contamination, and trophic state index, focused on eutrophication. These indices agreed in identifying a spatial pattern of smaller impact in terms of ecotoxicity, domestic sewage contamination, and eutrophication risk at three sites in rural areas (mean GMS 16.9), an intermediate impact at four sites with urban and agricultural influence (mean GMS 16.4), and greatest impacts at three more urbanized sites (mean GMS 14.9). Most frequent developmental abnormalities included noninflation of the swim bladder, delayed hatching, nonprotrusion of the mouth, blood stasis, and nondevelopment of pectoral fins. Toxic NH (© 2021 SETAC.) |
Databáze: | MEDLINE |
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