9 documents found, page 1 of 1
Adding Value to Mine Waste through Recovery Au, Sb, and As: The Case of Aurifer...
Lemos, M.; Valente, T.; Marinho Reis, P.; Fonseca, R.; Guabiroba, F.; Mata Filho, J.G.; Magalhães, M.F.; Delbem, I.D.; Rebelo Diório, G.From the colonial era to modern times, gold mining has played a crucial role in shaping Brazil’s economy, culture, and landscape, particularly in the Iron Quadrangle region. Therefore, resulting waste has accumulated in tailings structures, either from deactivated circuits or plants still in production. The present study reveals the potential assessed based on a set of metallurgical tests, assuming specific sce...
Hydrochemistry, Elements Distribution and Their Potential Recoveries in Gold Me...
Lemos, M.; Valente, T.; Marinho Reis, P.; Braga, A.S.; Fonseca, R.; Guabiroba, F.; Mata Filho, J.G.; Magalhães, M.F.; Silva, A.R.; Bhering, A.P.Recovering metals from mining wastewater is important in minimizing environmental pollution and maximizing resource efficiency. For this, a characterization step and understanding the oc-currence of metals and other compounds are essential. The present study focused on waters from different mining dams containing metals such as Au, Cu, Ni, Zn, and sulfates, located in the Iron Quadrangle region, (Brazil). The r...
Local environment and fragmentation by drought and damming shape different comp...
Martelo, J.; Gkenas, C.; Ribeiro, D.; Alves, M.J.; Ribeiro, F.; Cucherousset, J.; Gago, João; Magalhães, M.F.Pool refuges are critical for maintaining stream fish diversity in increasingly intermittent streams. Yet, the patterns and drivers of beta diversity of native and non-native fish in pool refuges remain poorly known. Focusing on Mediterranean streams, we decomposed beta diversity of native and non-native fish into richness difference (RichDiff) and species replacement (Repl), and local (LCBD, LCBDRichDiff and L...
Livro Vermelho dos Peixes Dulciaquícolas e Diádromos de Portugal Continental
Magalhães, M.F.; Amaral, S.D.; Sousa, M.; Alexandre, C.M.; Almeida, P.R.; Alves, M.J.; Cortes, R.; Farrobo, A.; Filipe, A. F.; Franco, A.; Jesus, J.As Listas Vermelhas de Espécies Ameaçadas da União Internacional para a Conservação da Natureza constituem indicadores importantes do estado da biodiversidade, e são amplamente utilizadas para informar e estruturar as atividades de conservação. Estas Listas, publicadas em Livros Vermelhos, resultam de um rigoroso processo de avaliação, baseado num sistema de categorias e critérios de diagnóstico do risco de ext...
Widespread hybridization between Invasive bleak (Alburnus alburnus) and Iberian...
Curto, M.; Morgado-Santos, M.; Alexandre, C.M.; Alves, M.J.; Gante, H.F.; Gkenas, C.; Medeiros, J.P.; Pinheiro, P.J.; Almeida, P.R.; Magalhães, M.F.Hybridization between native and nonnative fish species is a major conservation issue, especially in ecosystems with high levels of endemism, such as Iberian streams. To date, hybridization with the invasive bleak Alburnus alburnus has been reported for the Iberian chub Squalius alburnoides and S. pyrenaicus and in scattered locations only. However, the bleak is spreading in the region, potentially increasing t...
Widespread hybridization between Invasive bleak (Alburnus alburnus) and Iberian...
Curto, M.; Morgado-Santos, M.; Alexandre, C.M.; Alves, M.J.; Gante, H.F.; Gkenas, C.; Medeiros, J.P.; Pinheiro, J.P.; Almeida, P.R.; Magalhães, M.F.Hybridization between native and nonnative fish species is a major conservation issue, especially in ecosystems with high levels of endemism, such as Iberian streams. To date, hybridization with the invasive bleak Alburnus alburnus has been reported for the Iberian chub Squalius alburnoides and S. pyrenaicus and in scattered locations only. However, the bleak is spreading in the region, potentially increasing t...
Guia dos peixes de água doce e migradores de Portugal Continental
Collares-Pereira, M.J.; Alves, M.J.; Ribeiro, F.; Domingos, I.; Almeida, P.R.; Costa, L.; Gante, H.; Filipe, A.F.; Aboim, M.A.; Rodrigues, P.M.Num total de cerca de 35 500 espécies de peixes conhecidas em todo o mundo, aproxima- damente 18 000 espécies habitam ecossistemas de água doce. Apesar de representarem menos de 1% da superfície terrestre, os ecossistemas de água doce possuem uma enorme diversidade de condições tipicamente instáveis que, associadas ao isolamento geográfico das bacias hidrográficas, favorecem a formação de novas espécies
Negative impact on the reproductive potential of blue jack mackerel Trachurus p...
Neves, A.; Gordo, I.; Sequeira, V.; Vieira, A.R.; Silva, E.; Silva, F.; Duarte, A.M.; Mendes, S.; Ganhão, R.; Peleteiro, M.C.; Assis, C.; Rebelo, R.Reproduction of Trachurus picturatus off the western Portuguese coast was studied over 1 yr. During histological analyses, the presence of Kudoa sp. was detected in advanced vitellogenic oocytes. Kudoa infections are known to cause economic loss through the induction of postmortem liquefaction of fish muscles, but ovarian infection as reported in this study will seriously affect the reproductive potential of th...
Riparian ecotones and spatial variation of fish assemblages in Portuguese lowla...
Collares-Pereira, M.J.; Geraldes, Ana Maria; Magalhães, M.F.; Coelho, Maria M.The first results of a long-term study on the role of riparian ecotones on the population and community dynamics of Iberian stream fish are presented and discussed . Riparian and macrophyte cover, bank slope and depth were among the most important variables affecting fish distribution . In general small fish favoured shallow areas with high macrophyte cover, whereas large fish dominated in deep areas with a hig...