DEGEO - Departamento de Geologia

URI permanente desta comunidadehttp://www.hml.repositorio.ufop.br/handle/123456789/8

Navegar

Filtros

2017 - 20202

Configurações

Autor: search.filters.author.Messias, Maria Cristina Teixeira BragaAssunto: search.filters.subject.Canga

Resultados da Pesquisa

Agora exibindo 1 - 2 de 2
  • Nenhuma Miniatura Disponível
    Item
    Traditional ecological knowledge in a ferruginous ecosystem management : lessons for diversifying land use.
    (2020) Urriago Ospina, Lina Marcela; Jardim, Clarice Morais; Rivera Fernández, Germán Marino; Kozovits, Alessandra Rodrigues; Leite, Mariangela Garcia Praça; Messias, Maria Cristina Teixeira Braga
    Soils developed on banded iron formations (BIFs) present severe physical and chemical limitations to the establishment and growth of non-native cultivated plants. In Brazil, these areas are extensively exploited by Fe and Al mining, causing impacts that further hamper the growth of plant species for the purpose of ecological restoration or rehabilitation. However, traditional communities have historically managed this type of environment successfully for subsistence crops. An understanding of the methods used for such purpose will help future studies of land-use diversifcation and rehabilitation in these ferruginous soils. The aim of this study was to investigate the traditional ecological knowledge (TEK) of a community with great cultural richness inhabiting areas on BIFs in Ouro Preto, Brazil. Interviewees were selected by the snowball technique. Ethnoecological methods (interviews, free lists and guided visits) were used to record the types of soil management, cultivated species and socioeconomic profle of specialists. Specialists are mainly women over 45 years old, low schooling, born and living in the area for a long period. Trial and error and vertical transmission represent the main forms of TEK acquisition. There was high diversity of praxis in the ecological soil management, as well as of cultivated species (183). The methods used are efcient for the physical and chemical soil improvement, allowing the establishment of species, increasing agrobiodiversity and diversifying land use. The used techniques can provide technologies for the rehabilitation of mined areas, confrming the importance of ethnoecological studies for this purpose.
  • Nenhuma Miniatura Disponível
    Item
    Exploring Al, Mn and Fe phytoextraction in 27 ferruginous rockyoutcrops plant species.
    (2017) Schettini, Antonella Tonidandel; Leite, Mariangela Garcia Praça; Messias, Maria Cristina Teixeira Braga; Gauthier, Arnaud; Li, Haixiao; Kozovits, Alessandra Rodrigues
    Worldwide, substrates naturally rich in Al, Fe and Mn are the subject of mining, generating degradation oflarge areas and producing wastes with high pollution potential for water resources, soil and atmosphere,causing harm to human health and ecosystems. The present study investigated the total and phytoavail-able concentration of these elements in soils and leaves of 27 native plant species from ferruginous rockyoutcrops, finding values above the toxic limits described in literature and environmental legislation.Foliar levels of metals varied widely among species, demonstrating different phytoextraction or exclu-sion potentials, which were not explained by the total concentration of elements or available soil fractions.Although most species are not considered hyperaccumulators, the results indicate the existence of speciesrelated to sites of greater availability of certain metals or that can modify soil quality through their dif-ferent phytoextraction skills, with potential future uses in decontamination, stabilization, phytominingand ecological restoration projects.