An integrative approach to identify the impacts of multiple metal contamination sources on the Eastern Andean foothills of the Ecuadorian Amazonia

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dc.contributor.authorCapparelli, Mariana Vellosa
dc.contributor.authorMoulatlet, Gabriel Massaine
dc.contributor.authorAbessa, Denis Moledo de Souza [UNESP]
dc.contributor.authorLucas-Solis, Oscar
dc.contributor.authorRosero, Bryan
dc.contributor.authorGalarza, Emily
dc.contributor.authorTuba, Damian
dc.contributor.authorCarpintero, Natalia
dc.contributor.authorOchoa-Herrera, Valeria
dc.contributor.authorCipriani-Avila, Isabel
dc.contributor.institutionUniversidad Regional Amazónica Ikiam
dc.contributor.institutionUniversidad Católica del Ecuador
dc.contributor.institutionUniversidad San Francisco de Quito
dc.contributor.institutionUniversity of North Carolina at Chapel Hill
dc.contributor.institutionUniversidade Estadual Paulista (Unesp)
dc.date.accessioned2020-12-12T02:32:12Z
dc.date.available2020-12-12T02:32:12Z
dc.date.issued2020-03-20
dc.description.abstractCurrently, several concerns have been raised over metal contamination in the upper Amazon basin. Rivers that flow from the high Andes to the lowland Amazon are threatened by anthropogenic activities, which may, in turn, lead to increased metal concentrations in both water and sediments. In the present study, the impacts of multiple metal contamination sources in these ecosystems were identified. The degree of metal contamination was assessed in water and sediment and seed phytotoxicity analyses were carried out in samples taken from 14 sites located in upper Napo River tributaries, combining geochemical and ecotoxicological techniques. These tributaries were chosen based on their degree of anthropogenic contamination and proximity to known sources of relevant pollution, such as small-scale gold mining (MI), urban pollution (UP), fish farming (FF) and non-functional municipal landfill areas (LF). Our results suggest that anthropogenic activities are introducing metals to the aquatic ecosystem, as some metals were up to 500 times above the maximum permissible limits for the preservation of aquatic life established by Ecuadorian and North American guidelines. Sites located close to small-scale gold mining and sanitary landfills presented 100 to 1000 times higher concentrations than sites classified as “few threats”. In water, Cd, Pb, Cu, Zn and Hg were mostly above the maximum permissible limits in the samples, while Cd in sediment reached concentrations 5-fold above the probable effect level (PEL). Phytotoxicity was associated through the diffuse contamination present in urban and landfill areas. Overall, metal concentrations and phytotoxicity assessments suggest anthropogenic effects to environmental contamination, even though natural sources cannot be disregarded. Anthropogenic effects in the eastern Andean Rivers need to be constantly monitored in order to build a complete picture on how pollution sources may affect this strategic Amazon basin area.en
dc.description.affiliationFacultad de Ciencias de la Tierra y Agua Universidad Regional Amazónica Ikiam, km 7 vía a Muyuna
dc.description.affiliationEscuela de Química Facultad de Ciencias Exactas y Naturales Universidad Católica del Ecuador, Avenida 12 de Octubre 1076
dc.description.affiliationColegio de Ciencias e Ingenierías Instituto Biósfera Universidad San Francisco de Quito, Diego de Robles y Vía Interoceánica
dc.description.affiliationDepartment of Environmental Sciences and Engineering Gillings School of Global Public Health University of North Carolina at Chapel Hill
dc.description.affiliationSão Paulo State University - UNESP, Praça Infante Dom Henrique, s/n
dc.description.affiliationUnespSão Paulo State University - UNESP, Praça Infante Dom Henrique, s/n
dc.description.sponsorshipUniversidad San Francisco de Quito
dc.description.sponsorshipConselho Nacional de Desenvolvimento Científico e Tecnológico (CNPq)
dc.description.sponsorshipIdCNPq: #308533/2018-6
dc.identifierhttp://dx.doi.org/10.1016/j.scitotenv.2019.136088
dc.identifier.citationScience of the Total Environment, v. 709.
dc.identifier.doi10.1016/j.scitotenv.2019.136088
dc.identifier.issn1879-1026
dc.identifier.issn0048-9697
dc.identifier.scopus2-s2.0-85076988148
dc.identifier.urihttp://hdl.handle.net/11449/201425
dc.language.isoeng
dc.relation.ispartofScience of the Total Environment
dc.sourceScopus
dc.subjectFish farming
dc.subjectMetals
dc.subjectMining
dc.subjectNapo River
dc.subjectPhytotoxicity
dc.subjectSediments
dc.subjectUrban pollution
dc.subjectWater
dc.titleAn integrative approach to identify the impacts of multiple metal contamination sources on the Eastern Andean foothills of the Ecuadorian Amazoniaen
dc.typeArtigo
unesp.author.orcid0000-0003-2571-1207[2]

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