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Comparative Analysis of Metals in Seafood from Rio Doce Coastal Areas and Regional Fish Markets

Journal of Environmental Protection 2023年第10期14卷 859-887页

作者： William odle Vitor Alencar Freitas Da Silva Lorrana Moraes Marques Jacob oehrig Negin Kananizadeh Diogo Fonseca Alves Gaspar Michael Wild Independent Researcher New Fields Atlanta LLC. Atlanta USA Independent Researcher New Fields Brasil Consultoria Ambiental LTDA Belo Horizonte Brazil Independent Researcher New Fields United Kingdom LLC. Greengates Bradford UK

on November 5, 2015, the fundão dam breached (the “Event”), releasing water, tailings, dam construction material, and debris to downstream watercourses. over 20 million cubic meters of fine particles from the tailings, as well as scoured soil and sediments, reached the Rio Doce estuary and surrounding marine area 17 days later. Fishing was banned by the Federal Court of Espírito Santo in February 2016. The fishing ban area included the coastal area near the mouth of the Rio Doce and seaward to a depth of 25 meters, south to Barra do Riacho, and north to Degredo Beach. In June 2019, the Brazilian health agency, Anvisa, published a risk assessment for fish consumption which recommended daily consumption limits for fish of 200 grams for adults and 50 grams for children for both continental and coastal areas of the Rio Doce basin. Comparative analyses were performed between metal concentrations in marine fish and crustaceans collected in the banned fishing area to reference areas and commercialized seafood markets along the Brazilian coast. The results reveal that metals detected in seafood tissue collected in the fishing ban area are not significantly different than other reference areas or from commercially available seafood. This result indicates that elevated metal concentrations in seafood are a regional problem, unrelated to the Event. Higher concentrations of metals in fish in reference areas outside of the fishing ban area as well as in commercial seafood markets demonstrates that the risk management approach of a localized fishing ban is ineffective for reducing risk to the population related to seafood consumption. .

关键词： Fish Consumption Mine Tailings fundão dam Marine Environment Brazilian Coast Fishing Ban

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Study on Site Preparation and Restoration Techniques for Forest Restoration in Mining Tailings of Mariana,Brazil

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Research in Ecology 2020年第4期2卷 42-52页

作者： Sebastião Venâncio Martins Pedro Manuel Villa Fabio Haruki Nabeta Leonardo Ferreira da Silva Gabriel Correa Kruschewsky Andreia Aparecida Dias Forest Restoration Laboratory Department of Forest EngineeringUniversidade Federal de ViçosaViçosaMinas GeraisBrazil fundação Renova Belo HorizonteMGBrazil

Ecological restoration in forest ecosystem is a priority in Mariana,***,we evaluated the effects of passive and active restoration methods through different site preparation techniques by manipulating physical-chemical properties of substrates on tree community coverage in Mariana,Brazil.A total of 48 plots(12×12 m each)were established in two areas along the flood plains with accumulation of *** following treatments were established:(1)planting of native tree seedlings with fertilization(PSf)and(2)without fertilization(PS);(3)direct seeding of native trees with fertilization(SDf)and(4)without fertilization(SD);(5)natural regeneration with fertilization(NRf)and(6)without fertilization(NR).Differences in substrate properties and tree community coverage were evaluated between treatments,the substrate properties and tree community coverage relationship,and main effects of substrate fertility and texture on tree community *** were marked differences in substrate and plant coverage between *** average,the highest plant coverage was found in treatment with fertilization,such as NRf(59,5%)and SDf(48%).However,the treatment with seedling planting(PSf and PS)and NR did not show differences(~37%),while the lowest values were observed in SD(23%).There is a strong relationship between substrate fertility and plant community coverage,with significant positive *** observed that the passive and active restoration methods can be complementary in the soil and plant community coverage recovery.

关键词： Seeding fundão dam Natural regeneration Seeding Seedlings Resilient mitigation Site effects

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Effects of Forest Restoration Techniques on Community Diversity and Aboveground Biomass on Area Affected by Mining Tailings in Mariana,Southeastern Brazil

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Research in Ecology 2020年第4期2卷 22-30页

作者： Ítalo Favoreto Campanharo Sebastião Venâncio Martins Pedro Manuel Villa Gabriel Correa Kruschewsky Andreia Aparecida Dias Fabio Haruki Nabeta Forest Restoration Laboratory Department of Forest EngineeringUniversidade Federal de Viçosa(UFV)ViçosaMinas Gerais StateBrazil fundação Renova Belo HorizonteMinas GeraisBrazil

Currently there is an urgent and special attention in actions to restore tropical *** this study,we evaluated the effect of different restoration methods on aboveground biomass(AGB)stock,tree community diversity and structure,in areas affected by the fundão tailings dam collapse in Mariana,Minas Gerais state,*** measured and compiled data of the AGB,community diversity and structure attributes in 36 plots distributed in six restoration treatments and six replicas:planting of native tree seedlings with fertilization and pH correction(PSf)and without fertilization and pH correction(PS);seeding of native trees with fertilization and pH correction(SDf)and without fertilization and pH correction(SD);natural regeneration with fertilization and pH correction(NRf)and without fertilization and pH correction(NR).No significant differences in substrate properties and AGB between *** biomass storage between treatments was not statistically different,there is a clear pattern showing higher values active restoration *** Pielou index ranged from 0.520(SDf)to 0.943(NR),except for SDf all the others treatments had values higher than *** result suggests floristic heterogeneity,without ecological dominance in the plant ***,active restoration had important implications for the forest restoration where natural regeneration is limited.

关键词： Planting of seedlings Direct seeding Natural regeneration Forest restoration fundão dam

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