Monitoring of ichthyoplanktonic community at the Doce River mouth and adjacent marine region in Southeast Brazil after Fundão dam collapse

Journal of Sea Research, Год журнала: 2022, Номер 189, С. 102284 - 102284

Опубликована: Сен. 30, 2022

In November 2015, the Fundão dam located in southeast Brazil collapsed, releasing approximately 50 million cubic meters of slurry contaminated with metals into Doce River, reaching marine coastal area. The main objective this study was to analyze effect mud plume after collapse on abundance, composition, and diversity ichthyoplankton during monitoring period one year. We also aimed verify impact River discharge, meteoceanographic events, environmental factors abundance fish eggs larvae. Samplings were conducted at 32 stations 2018, January, April, July 2019. Water temperature, salinity, dissolved oxygen, nutrients assessed from samples obtained water's surface. Ichthyoplankton collected surface along water column using a Neuston Bongo nets, respectively. Most non-viable most sampling periods areas. A total 65 families recorded area, Engraulidae, Clupeidae, Gobiidae, Carangidae, Labridae, Haemulidae, Sciaenidae dominated. Average equitability higher column. influence tailings evidenced by negative correlation larvae abundances some metals, association cobalt. addition, greater flow related lower mean abundances. Further studies are needed monitor continuity effects toxic possible changes it causes ichthyoplanktonic assemblages.

Язык: Английский

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Spatial–temporal variations of metals and arsenic in sediments from the Doce River after the Fundão Dam rupture and their bioaccumulation in Corbicula fluminea

Integrated Environmental Assessment and Management, Год журнала: 2023, Номер 20(1), С. 87 - 98

Опубликована: Апрель 7, 2023

The rupture of the Fundão dam in Brazil released tons mining tailings into Doce River Basin (DRB). This investigation aimed to determine bioaccumulation metals soft tissues bivalve Corbicula fluminea exposed sediments collected DRB four periods (just after, 1, 3, and 3.5 years after rupture). In exposure bioassays, concentrations Al, As, Cd, Cr, Cu, Fe, Mn, Ni, Pb, Zn were quantified. concentration some elements (As, Al) exceeded federal limits or regional backgrounds at sampling sites, but their tended decrease over time. However, higher many detected winter 2019. Several C. tissues, factors generally low not related those associated with ore tailings, evidencing that bioavailability bivalves, laboratory conditions, was limited. Integr Environ Assess Manag 2024;20:87-98. © 2023 SETAC.

Язык: Английский

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Ensuring the Human Right to Water in Dam Break Scenarios Using Geoprocessing and Multicriteria Analysis

IntechOpen eBooks, Год журнала: 2024, Номер unknown

Опубликована: Янв. 11, 2024

The high incidence of mining dam failures in recent decades and the socio-environmental aspects related to these events demand improvements disaster risk management sector. One impacts is alteration water quality downstream breach. This chapter presents a methodology determine critical points regarding assurance right access safe water, signaling locations that deserve special attention, demonstrating practical application through case study Piracicaba River. Geotechnology solutions, such as use multicriteria analysis associated with geoprocessing, play prominent role spatial studies environmental impacts, those caused by failures. overlay various layers information, whether they are or anthropogenic factors, provides coherent consistent data concerning reality presented particularity each studied location. assessment impact breach on surface catchments carried out this technology, ranking potential damages and, consequently, allows for better decision-making mitigation even prevention future interruption supply from potentially affected watercourses.

Язык: Английский

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Impact on Energy Metabolism, Biochemical, and Behavioral of a Sentinel Mangrove Crab by Settleable Atmospheric Particulate Matter from Steel Industries

Опубликована: Янв. 1, 2024

We use the sentinel mangrove crab, Minuca rapax, as a model to investigate effects of metallic settleable particulate matter (SePM) on wetland. Multiple levels energetic responses, including (i) metabolic rate and energy budget, (ii) oxidative stress, (iii) behavioral response by righting time, were assessed well metal metalloid content in crabs exposed 0, 0.1 1 g.L-1 SePM, under emerged submerged conditions over five days, simulating rigors intertidal habitat. Al, Fe, Mn, Cr, Y exhibited concentration-dependent increase. Metal concentrations higher due continuous ingestion SePM direct exposure through gills. Exposure concentration up decreased enzymatic activities, reduced assimilation efficiency for maintenance, induces slower probably nervous system deficits. In conclusion, affects redox status physiology M. rapax depending submersion regime concentration. The disruption budget lethargic behavior implies potential ecological alterations ecosystem with unknown consequences local population.

Язык: Английский

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Environmental Disasters and Mining: A Literary Analysis of the Impacts of From this Relationship

Revista de Gestão Social e Ambiental, Год журнала: 2024, Номер 18(2), С. e07603 - e07603

Опубликована: Июль 1, 2024

Objective: This study aimed to analyze the evolution of theoretical field on impacts environmental disasters caused by mining activities. Method: To carry out this study, a systematic literature review was used as methodological resource, and articles in portfolio were analyzed using PRISMA protocol. Results Discussion: Based analysis, relevant distribution identified between years investigated, discussions focused themes such effects ecosystem (rivers, lakes, flora fauna) well social economic aspects linked disasters. Conclusion: There is recurrence studies dealing with Brazil consolidation negative externalities these events.

Язык: Английский

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