Biochemical response and metals bioaccumulation in planktonic communities from marine areas impacted by the Fundão mine dam rupture (southeast Brazil)
العنوان: | Biochemical response and metals bioaccumulation in planktonic communities from marine areas impacted by the Fundão mine dam rupture (southeast Brazil) |
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المؤلفون: | Anieli C. Maraschi, Juliana Zomer Sandrini, Patrícia Gomes Costa, Joseane Aparecida Marques, Simone Rutz da Costa, Adalto Bianchini, Henrique Fragoso Dos Santos, Marta Marques Souza, Camila de Martinez Gaspar Martins, Carlos Eduardo Delfino Vieira |
المصدر: | Repositório Institucional da USP (Biblioteca Digital da Produção Intelectual) Universidade de São Paulo (USP) instacron:USP |
بيانات النشر: | Elsevier BV, 2022. |
سنة النشر: | 2022 |
مصطلحات موضوعية: | Biomass (ecology), geography, Environmental Engineering, geography.geographical_feature_category, Ecology, Drainage basin, Biodiversity, Plankton, Seasonality, medicine.disease, Bioaccumulation, Pollution, Tailings, medicine, River mouth, Environmental Chemistry, Environmental science, PLÂNCTON MARINHO, Waste Management and Disposal, Brazil, Water Pollutants, Chemical, Environmental Monitoring |
الوصف: | The rupture of the Fundao dam (Mariana, MG, southeast Brazil) released a huge flood of mine tailings to Doce river basin and its adjacent coastal area, in November 2015. This catastrophic event exposed aquatic communities to metal contamination related to mine tailings, but its biological effects are still poorly understood. This study investigates how biochemical response related to metal exposure vary between locations and seasons during the years of 2018–2020, in planktonic communities (micro and mesoplankton). Marine microplankton collected in sectors in front and south of the Doce river mouth presented the highest lipid peroxidation (LPO) and induction of metallothioneins (MT). Mesoplankton collected in sectors in front and north of the Doce river mouth presented highest LPO, while MT in this size class did not respond to a clear spatial pattern. Our results showed that metals affected biomarkers in a non-linear pattern and highlighted the complex relationship between metals, biochemical parameters, and seasonality. The variation in biochemical biomarkers indicates physiological stress related to metals, once sectors contaminated by metals, especially Fe, Mn and Cd, presented stronger biochemical responses. Comparison of metal levels with bioaccumulation data collected before the impact indicates Fe, Cd, Cr and Cu more than 2-fold higher after disaster in sectors closer to the river. Literature showed that these sectors present zooplanktonic assemblages with lower biomass and biodiversity, suggesting that the opportunistic species that thrives in the area are also under biochemical stress, but possibly relies on repair or defense mechanisms. The physiological stress detected by this study is possibly related to the mine tailings, considering the metals that stood out and the proximity with the Doce river mouth. This suggests that the impacts related to the failure of Fundao dam are still affecting the marine planktonic community even three to four years after the environmental disaster. |
تدمد: | 0048-9697 |
URL الوصول: | https://explore.openaire.eu/search/publication?articleId=doi_dedup___::79e2e8b3bd750d4b58a6778f3a89ab4b https://doi.org/10.1016/j.scitotenv.2021.150727 |
حقوق: | OPEN |
رقم الأكسشن: | edsair.doi.dedup.....79e2e8b3bd750d4b58a6778f3a89ab4b |
قاعدة البيانات: | OpenAIRE |
تدمد: | 00489697 |
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