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  1. Article ; Online: Food web structure of fish communities of Doce River, 5 years after the Fundão dam failure.

    de Carvalho, Débora Reis / Ferreira, Frederico Fernandes / Dergam, Jorge A / Moreira, Marcelo Zacharias / Pompeu, Paulo Santos

    Environmental monitoring and assessment

    2024  Volume 196, Issue 3, Page(s) 300

    Abstract: The rupture of the Fundão dam is considered the largest mining failure in history, which had a particularly detrimental impact on fish populations, as the mud from the ore tailings significantly altered the water quality and habitat of Doce River basin. ... ...

    Abstract The rupture of the Fundão dam is considered the largest mining failure in history, which had a particularly detrimental impact on fish populations, as the mud from the ore tailings significantly altered the water quality and habitat of Doce River basin. This study aimed to assess the trophic structure of fish communities in areas impacted and not impacted by the dam rupture in the Doce River basin. To evaluate the food web structure, community-wide trophic niche, and trophic positions of fish, stable isotopes of carbon (δ
    MeSH term(s) Animals ; Rivers/chemistry ; Food Chain ; Environmental Monitoring ; Water Pollutants, Chemical/analysis ; Fishes
    Chemical Substances Water Pollutants, Chemical
    Language English
    Publishing date 2024-02-24
    Publishing country Netherlands
    Document type Journal Article
    ZDB-ID 782621-7
    ISSN 1573-2959 ; 0167-6369
    ISSN (online) 1573-2959
    ISSN 0167-6369
    DOI 10.1007/s10661-024-12395-7
    Database MEDical Literature Analysis and Retrieval System OnLINE

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  2. Article ; Online: Impacts of the Samarco Tailing Dam Collapse on Metals and Arsenic Concentration in Freshwater Fish Muscle from Doce River, Southeastern Brazil.

    Ferreira, Frederico Fernandes / de Freitas, Mariella Bontempo Duca / Szinwelski, Neucir / Vicente, Natállia / Medeiros, Laila Carine Campos / Schaefer, Carlos Ernesto Gonçalves Reynaud / Dergam, Jorge Abdala / Sperber, Carlos Frankl

    Integrated environmental assessment and management

    2020  Volume 16, Issue 5, Page(s) 622–630

    Abstract: On November 2015, Samarco tailings dam in Mariana, Minas Gerais, Brazil, collapsed, releasing 62 million tons of tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although the collapse was the worst environmental disaster ... ...

    Abstract On November 2015, Samarco tailings dam in Mariana, Minas Gerais, Brazil, collapsed, releasing 62 million tons of tailings that advanced through 668 km of the Doce River and adjacent floodplain. Although the collapse was the worst environmental disaster in Brazil, little is known about its consequences to aquatic biota. Here we evaluate the effects of the tailings mudflow on metal and As concentration in fish and how concentration correlates with water and fish characteristics. We quantified semitotal amounts of Ag, Al, As, Cd, Cr, Cu, Fe, Hg, Mn, Ni, Pb, and Zn in fish muscle tissue using inductively coupled plasma mass spectrometry (ICP-MS) in 255 individuals (34 species) sampled in unaffected and affected areas along the Doce River basin. Arsenic and Hg were higher in fish from affected sites, likely due to turbulent mixing of previously sedimented material by the giant tailings wave. Silver and Zn concentrations were higher in unaffected sites. Arsenic concentration in Geophagus brasiliensis decreased with increasing fish weight. Copper and Zn decreased with increasing fish weight considering the whole assembly of fish. The tailings mudflow increased water conductivity, and conductivity increased Al concentration in fish, so we expected a larger Al concentration in fishes from affected sites. However, the observed Al concentration in fishes from affected sites was lower than expected by water conductivity. Thus, the tailings mudflow reduced Al uptake or accumulation in fishes. Mercury decreased with increasing water conductivity in both unaffected and affected sites considering all species and in G. brasiliensis alone. Despite the relatively low concentration range of metals and As found in fish, fishes from sites affected by the Fe ore tailings mudflow showed higher As and Hg concentration, compared to fishes from unaffected sites. The higher As and Hg in affected sites require further detailed monitoring to ensure safeguards of human health by fishing activity along the Doce River. Integr Environ Assess Manag 2020;16:622-630. © 2020 SETAC.
    MeSH term(s) Animals ; Arsenic ; Brazil ; Environmental Monitoring ; Fishes ; Fresh Water ; Humans ; Metals, Heavy/analysis ; Muscles/chemistry ; Rivers ; Structure Collapse ; Water Pollutants, Chemical/analysis
    Chemical Substances Metals, Heavy ; Water Pollutants, Chemical ; Arsenic (N712M78A8G)
    Language English
    Publishing date 2020-07-17
    Publishing country United States
    Document type Journal Article
    ZDB-ID 2234931-5
    ISSN 1551-3793 ; 1551-3777
    ISSN (online) 1551-3793
    ISSN 1551-3777
    DOI 10.1002/ieam.4289
    Database MEDical Literature Analysis and Retrieval System OnLINE

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