Micropollutants impair the survival of Oreochromis niloticus and threat local species from Iguaçu River, Southern of Brazil

Gemusse, Satar Luciano; Folle, Nilce Mary Turcatti; Souza, Angie Thaisa da Costa; Azevedo-Linhares, Maristela; Neto, Francisco Filipak; Ortolani-Machado, Claudia Feijó; Garcia, Juan Ramón Esquivel; Esquivel, Luíse; Silva, Cleber Pinto da; Campos, Sandro Xavier de; Martins, César de Castro; Ribeiro, Ciro Alberto de Oliveira

doi:10.1016/j.etap.2021.103596

Cited by 20 publications

(3 citation statements)

References 42 publications

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“…Finally, it is known that many polar PAH metabolites—such as 4-hydroxybenz[ a ]anthracene; 3-, 4-, and 10-hydroxybenz[ a ]anthracenes; and 2-hydroxychrysene—have TEF values up to 10 times greater than original PAHs, in which case, ecological risks would be sub-estimated [ 19 , 23 , 55 ]. Although these and many other polar PAHs were not considered, the method proposed by Cao et al provides a simple way to assess risk based solely on the concentrations and toxic equivalent factors of the 16 US EPA-designated PAHs, providing valuable information on the corresponding monitored sites.…”

Section: Resultsmentioning

confidence: 99%

“…For a deeper understanding regarding the chronic effects of PAHs in difficult-to-reach environments with low contamination levels (e.g., wildlife protected coastal areas), field measurements of PAHs in such environments are indispensable. Efforts are being made around the world to measure the extent of contamination, and reliable data are crucial for setting realistic goals in the fight to reduce anthropogenic stressors [ 22 , 23 ]. In addition, to improving remediation initiatives, it is necessary to understand the pollutants’ environmental pathways—that is, to understand the spatial distribution of pollutants and their propagation, considering different seasonal variables.…”

Section: Introductionmentioning

confidence: 99%

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Geochemical Control of PAHs by Inflowing River Water to West Nanao Bay, Japan, and Its Influences on Ecological Risk: Small-Scale Changes Observed under Near-Background Conditions at an Enclosed Bay

Mundo

Matsunaka

Iwai

et al. 2021

IJERPH

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Polycyclic aromatic hydrocarbons (PAHs), even at low concentrations, have been shown to trigger changes in life cycles and provoke abnormal behaviors in numerous marine organisms. From May 2019 to September 2020, particulate and dissolved PAH concentrations were analyzed on the surface water of West Nanao Bay, Japan, to determinate their levels, emission sources, environmental pathways, and ecological risks at this remote but semi-enclosed bay. The 14 targeted PAHs were analyzed by HPLC-fluorescence detector. Mean total PAH concentrations were lower than 20.0 ng L−1 for most samples. Based on fluoranthene (Flu) to pyrene (Pyr) ([Flu]/[Flu + Pyr]) and benzo[a]anthracene (BaA) to chrysene (Chr) ([BaA]/[BaA + Chr]) isomeric ratios and a varimax rotated PCA, it was established that biomass combustion was the principal source in the particulate phase and that liquid fossil fuel combustion was the principal source in the dissolved phase. From salinity and turbidity distribution, riverine discharges were determined to be the major and continuous transportation pathway of particulate PAHs. It was observed that rain events had a role in the transport of dissolved PAHs. The risk quotients (RQ∑14 PAHs (NCs): 0–84.53) indicated that PAHs represented a very low to low acute environmental risk. The results of this study will contribute to filling the paradigm gap of ecotoxicological studies in remote areas, working as a booster for future in-lab studies of non-lethal implications of endocrine disruptors such as PAHs.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Geochemical Control of PAHs by Inflowing River Water to West Nanao Bay, Japan, and Its Influences on Ecological Risk: Small-Scale Changes Observed under Near-Background Conditions at an Enclosed Bay

Mundo

Matsunaka

Iwai

et al. 2021

IJERPH

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“…A água deste rio foi testada quanto à sua toxicidade em peixe Oreochromis niloticus por 81 dias, e foram observadas evidências toxicológicas como lesões histopatológicas em guelra e fígado, e desregulação endócrina e reprodutiva dos peixes. Portanto, os pesquisadores apontam que a poluição orgânica e inorgânica encontrada leva à exposição de organismos locais e que tais poluentes, provenientes da região metropolitana, aumenta o risco toxicológico (Gemusse et al, 2021).…”

Section: Introductionunclassified

Efeitos ecotoxicológicos de cetoconazol combinado a microplásticos virgens e envelhecidos em >i<Daphnia similis>/i<

Ishii¹

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Assessing the pollution and ecotoxicological status of the Iguaçu River, southern Brazil: A review

de Morais,

Barreto,

de Souza

et al. 2024

Integr Envir Assess & Manag

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The degradation of water resources available for human consumption is increasing with the continuous release of chemicals into aquatic environments and their inefficient removal in wastewater treatment. Several watersheds in Brazil, such as the Iguaçu River, are impacted by multiple sources of pollution and lack information about their pollution status. The Iguaçu River Basin has great socioeconomic and environmental relevance both for the supply of water resources and its high hydroelectric potential, as well as for the high rate of endemism of its ichthyofauna. Also, it is home to large conservation units, such as the Iguaçu National Park, recognized by Unesco as a Natural Heritage of Humanity. Thus, the current review discusses the chemical pollution in the Iguaçu River Basin (IRB) approaching: i) the main sources of pollution; ii) the occurrence of inorganic and organic micropollutants; iii) the available ecotoxicological data, and iv) the socioeconomic impacts in three regions of the upper, middle, and lower IRB. Different studies reported relevant levels of emerging contaminants, persistent organic pollutants (POPs), toxic metals, and polycyclic aromatic hydrocarbons (PAHs), detected in the water and sediment samples, especially in the upper IRB region, associated with domestic and industrial effluents. Additionally, significant concentrations of pesticides and toxic metals were also detected in the lower IRB, revealing that agricultural practices are also relevant sources of chemicals for this watershed. More recently, studies indicated an association between fish pathologies and the detection of micropollutants in the water and sediments from IRB. The identification of the main sources of pollutants, associated with the distribution of hazardous chemicals in the IRB and their potential effects on the biota, as described in this review, represents an important strategy to support water management by public authorities for reducing potential risks of the local endemic biodiversity and exposed human populations.

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Micropollutants impair the survival of Oreochromis niloticus and threat local species from Iguaçu River, Southern of Brazil

Cited by 20 publications

References 42 publications

Geochemical Control of PAHs by Inflowing River Water to West Nanao Bay, Japan, and Its Influences on Ecological Risk: Small-Scale Changes Observed under Near-Background Conditions at an Enclosed Bay

Geochemical Control of PAHs by Inflowing River Water to West Nanao Bay, Japan, and Its Influences on Ecological Risk: Small-Scale Changes Observed under Near-Background Conditions at an Enclosed Bay

Efeitos ecotoxicológicos de cetoconazol combinado a microplásticos virgens e envelhecidos em >i<Daphnia similis>/i<

Assessing the pollution and ecotoxicological status of the Iguaçu River, southern Brazil: A review

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