Is the Doce River elutriate or its water toxic to Astyanax lacustris (Teleostei: Characidae) three years after the Samarco mining dam collapse?

Passos, Larissa Souza; Gnocchi, Karla Giavarini; Pereira, Tatiana Miura; Coppo, Gabriel Carvalho; Cabral, Dandara Silva; Gomes, Levy Carvalho

doi:10.1016/j.scitotenv.2020.139644

Cited by 38 publications

(18 citation statements)

References 39 publications

Supporting

Mentioning

Contrasting

Unclassified

Order By: Relevance

“…According to Queiroz et al (2018), seven days after the Fundão dam burst (in 2015), the concentration of Fe and Mn found in the sediment of the Doce River estuary were 34,900 and 586 mg/kg, respectively. In 2018, three years after the disaster, metal concentrations remained high, with 26,450 mg of Fe/kg and 1075 mg of Mn/kg (Passos et al 2020). Thus, with resuspension events in the sediment, which are frequent in rivers, the metals associated with the sediment particles can become bioavailable again in the water column, contaminating the biota present in the river (Queiroz et al 2018).…”

Section: Discussionmentioning

confidence: 99%

Biochemical and Genotoxic Effects of Iron and Manganese in Oreochromis Niloticus (Teleostei: Cichlidae)

Passos

Coppo

Pereira

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

The Doce River, southeastern Brazil, in 2015 received iron mining tailings after the Fundão (MG) dam burst, which resulted in the leakage of about 50 million cubic meters of tailings mud, which have iron (Fe) and manganese (Mn) as main components, causing much damage to health to aquatic organisms, including death. Since exposure of aquatic organisms to metals can cause genotoxic damage and induce the generation of reactive oxygen species, causing oxidative damage to biomolecules, the present study aimed to evaluate the toxicity of the association between Fe and Mn in Oreochromis niloticus through genotoxic (micronucleus test and comet assay), and biochemical (CAT and GST enzymes) assays. The tested treatments were T1 = control group, T2 = 3.81 mg/L of Fe + 0.5 mg/L of Mn, and T3 = 7.62 mg/L of Fe + 5.23 mg/L of Mn, during 96-h bioassays. All animals exposed to the metals showed a significant increase in erythrocyte micronucleus frequency and DNA damage. The hepatic GST activity increased two times in animals exposed to T3 compared to control group. The results indicate that Fe + Mn caused genotoxic and biochemical changes in exposed fish. Therefore, excess metals in ecosystems, even those essential for organisms, can be dangerous for the local biota due to the risk associated with high concentrations of these metals.

show abstract

Section: Discussionmentioning

confidence: 99%

Biochemical and Genotoxic Effects of Iron and Manganese in Oreochromis Niloticus (Teleostei: Cichlidae)

Passos

Coppo

Pereira

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

show abstract

Section: Concentration Of Metals In the Gonadsmentioning

confidence: 99%

Evidence of Reproductive Disturbance in Astyanax Lacustris (Teleostei: Characiformes) From the Doce River After the Collapse of the Fundão Dam in Mariana, Brazil

Merçon

Cabral

Teixeira

et al. 2021

Preprint

Self Cite

View full text Add to dashboard Cite

On November 5th, 2015, the Fundão Dam collapsed dumping more than 50 million/m3 of iron ore tailings, enriched with metals, into the Doce River channel. The objective of this study was to evaluate the reproductive biology and histological damage in Astyanax lacustris exposed to the metals from the dam collapse. The study was carried out at Doce River, in Espírito Santo State, Brazil. Monthly samplings were carried out for a year. Astyanax lacustris had multiple spawning: females reproductive peak was in September, October, November, and December; and males between September, October, January, and February. There was a latency in the formation of gonads. For male gonads, it was necessary a 6 cm growth for it to increase from 30% to 50% and 4 cm for female gonads to increase from 40% to 50%. There is a positive correlation between gonad’s concentration of Al and Fe and the rate of histological damage in females. Male gonads had a high rate of immature cells invading the cell lumen (47.36%) and female gonads showed higher frequency of atresia (39.64%). Fish exposed to the contaminated water showed high gonad histological damage. The observed changes can directly influence the organism development and reproduction in the long run, thus affecting A. lacustris population present in the region.

show abstract

“…According to Passos et al (2020), the lower Doce River is a region that has frequent resuspension events that can make elements, previously sedimented, available again in the water column. Although the prevalence in this study was lower, the presence of sh with intersex can directly impact the development and reproduction of offspring and, consequently, the population of A. lacustris in the lower Doce River can be affected in the long term (Prado et al 2011).…”

Section: Concentration Of Metals In the Gonadsmentioning

confidence: 99%

“…The populations of A. lacustris from the Doce River are being exposed to metals throughout their life cycle, due to the environmental disaster that occurred after the Mariana dam collapsed in 2015 (Passos et al, 2020). With the hypothesis that the enrichment of metals in water can negatively in uence the reproduction of sh (Kime 1998;Blazer 2002; James 2011), this work aimed to evaluate the reproductive biology of A. lacustris in the lower Doce River and to verify the deleterious histological effects of a population chronically exposed to tailings from the dam rupture in November 2015.…”

Section: Introductionmentioning

confidence: 99%

“…Silva et al (2010) stated that the period from October to March had the highest rainfall. Thus, the metals considered the most abundant in the lower Doce River region (Al and Fe) would become available and toxic during such resuspension events Passos et al (2020). reported high concentrations of Fe in the elutriate and sediment of the Doce River in November 2018, with an average of 590 µg.L − 1 and 26.04 mg.kg − 1 , respectively.…”

mentioning

confidence: 99%

See 1 more Smart Citation

Evidence of reproductive disturbance in Astyanax lacustris (Teleostei: Characiformes) from the Doce River after the collapse of the Fundão Dam in Mariana, Brazil

Merçon

Cabral

Teixeira

et al. 2021

Environ Sci Pollut Res

View full text Add to dashboard Cite

On November 5 th , 2015, the Fundão Dam collapsed dumping more than 50 million/m 3 of iron ore tailings, enriched with metals, into the Doce River channel. The objective of this study was to evaluate the reproductive biology and histological damage in Astyanax lacustris exposed to the metals from the dam collapse. The study was carried out at Doce River, in Espírito Santo State, Brazil. Monthly samplings were carried out for a year. Astyanax lacustris had multiple spawning: females reproductive peak was in September, October, November, and December; and males between September, October, January, and February. There was a latency in the formation of gonads. For male gonads, it was necessary a 6 cm growth for it to increase from 30% to 50% and 4 cm for female gonads to increase from 40% to 50%. There is a positive correlation between gonad's concentration of Al and Fe and the rate of histological damage in females. Male gonads had a high rate of immature cells invading the cell lumen (47.36%) and female gonads showed higher frequency of atresia (39.64%). Fish exposed to the contaminated water showed high gonad histological damage. The observed changes can directly in uence the organism development and reproduction in the long run, thus affecting A. lacustris population present in the region.

show abstract

Is the Doce River elutriate or its water toxic to Astyanax lacustris (Teleostei: Characidae) three years after the Samarco mining dam collapse?

Cited by 38 publications

References 39 publications

Biochemical and Genotoxic Effects of Iron and Manganese in Oreochromis Niloticus (Teleostei: Cichlidae)

Biochemical and Genotoxic Effects of Iron and Manganese in Oreochromis Niloticus (Teleostei: Cichlidae)

Evidence of Reproductive Disturbance in Astyanax Lacustris (Teleostei: Characiformes) From the Doce River After the Collapse of the Fundão Dam in Mariana, Brazil

Evidence of reproductive disturbance in Astyanax lacustris (Teleostei: Characiformes) from the Doce River after the collapse of the Fundão Dam in Mariana, Brazil

Contact Info

Product

Resources

About