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| Registros recuperados: 31 | |
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| Brito,Leomara Pessoa; Araújo Lacerda,José Dantas; Araújo Soares,Cintia; Monteiro Júnior,Franklin Luís Carlos; Souza,Magno Chagas; Aguiar Fonseca e Souza,Áurea Izabel; Lima,Clenes Cunha; Rodrigues,Marcos. |
| Abstract This study aimed to verify the impact of different methods of overcoming dormancy in the germination of Ipomoea cavalcantei seeds, in addition to surveying the biometric data of its seeds and fruits. Ripe fruits were randomly collected from the species' habitat, which is a unique ecosystem characterized by small vegetation and iron outcrops. For the biometric analyses, the weight, moisture content, length, width, and thickness of 100 fruits and 100 seeds were determined. To analyse the efficiency of overcoming seed dormancy, six different treatments were tested, including mechanical, physical, and chemical methods, and the resultant germinability, average germination time, and germination speed index were evaluated. Further, in order to estimate... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Conservation unit; Dormancy; Ipomoea cavalcantei; Mining; Scarification. |
| Ano: 2022 |
URL: http://www.scielo.org.co/scielo.php?script=sci_arttext&pid=S0120-28122022000100081 |
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| Milanez,Bruno. |
| ABSTRACT In this article, I argue that attempting to solve real problems is a possible approach to bring social and natural sciences together, and suggest that - as Environmental Impact Assessment necessarily brings together social and environmental issues - this debate is a strong candidate for such a task. The argument is based on a general discussion about the possibilities and limitations of Environmental Impact Assessments, the social-environmental impacts of mining activities and three case studies. The analysis of the cases indicates possibilities and limitations of the dialogue between scientists from various areas - and of the collaboration with social movements and affected communities - in avoiding negative impacts of mining projects and,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Interdisciplinary; Sustainability; Social-environmental conflicts; Mining. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000502335 |
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| Tótola,Marcos Rogério; Borges,Arnaldo Chaer. |
| The growth of Cedrella fissilis Vell. (Cedro Rosa) and of Anadenanthera peregrina Benth (Angico Vermelho) in bauxite spoil was studied to evaluate their response to substrate amendment or to inoculation with arbuscular mycorrhizal fungi (AMF). The plants were grown in bauxite spoil, topsoil or spoil amended with either topsoil or compost, and inoculated with the AMF Acaulospora scrobiculata, Gigaspora margarita or Glomus etunicatum. Root colonization was highly dependent on the interaction plant-fungus-substrate. In C. fissilis, root colonization by Gigaspora margarita dropped from 75% in bauxite spoil to only 4% in topsoil. Contrarily, root colonization of A. peregrina by the same fungus increased from 48% in spoil to 60% in topsoil. Root colonization of... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Rehabilitation; Mining; Glomus; Acaulospora; Gigaspora. |
| Ano: 2000 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1517-83822000000400004 |
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| Gnandi, K.; Tobschall, H.J.. |
| Metal concentrations of 37 soil samples taken from mining areas (abandoned mine pits and transport routes) in Kpogamé and Hahotoé (southern Togo) range from 0.2-43 ppm for Cd, 15-115 ppm for Pb, 182-1,029 ppm for Cr, 18-356 ppm for Cu, 15-342 pm for Ni, 90-513 ppm for V, 35-536 ppm for Zn, 80-469 ppm for Zr and 266-3,161 ppm for Sr. The tropical alteration of the ore waste plays an important role in the distribution of trace elements in the studied soils. Because the alteration affects the element mobility, generally old abandoned mining areas, which , together with soils near the transport routes, show a higher degree of contamination. Under low pH and oxidising conditions in studied soils Cd, Ni and Zn are generally easily mobilised and are thus... |
| Tipo: Journal Contribution |
Palavras-chave: Heavy metals; Mining; Phosphorite; Pollution; Heavy metals; Pollution; Http://aims.fao.org/aos/agrovoc/c_2223; Http://aims.fao.org/aos/agrovoc/c_6077. |
| Ano: 2002 |
URL: http://hdl.handle.net/1834/2715 |
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| Farias dos Santos,Joana; Roppa,Cristiane; Holanda de Oliveira,Schweyka Stanley; Valcarcel,Ricardo. |
| The study was taken in a reclamation area where soil was removed up to 13 meters deep in 1979, near Itaguaí county, Brazil (23º 55' 07'' S, 43º 49' 73'' O). In 2007 the composition and horizontal structure of the shrubby-arboreal strata was evaluated in five 13 years old forest plantations with similar environment conditions. For rehabilitation, rustic pioneer species were used to guarantee a sustainable successional process, which depends on species selection and their functional complementarities. Treatments were: T0 (control); T1 (100 % of exotic species); T2 (52% of exotic species); T3 (50% exotic and 50% native); T4 (39% exotic and 61% native); and T5 (15% exotic and 85% native). Variables measured were height, DBH (≥ 3.0 cm), basal area,... |
| Tipo: Journal article |
Palavras-chave: Degradation area; Mining; Tree species; Vegetal succession. |
| Ano: 2011 |
URL: http://www.scielo.cl/scielo.php?script=sci_arttext&pid=S0718-16202011000100009 |
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| Zegarra Mendez, Eduardo; Orihuela, Jose Carlos; Paredes, Maritza. |
| Este estudio es una exploración cuantitativa del impacto de la actividad minero-metálica en los hogares de la sierra peruana, en el que hemos empleado métodos estándares de evaluación de impactos. Sobre la base de datos de la ENAHO 2003/04, realizamos un análisis separado por hogares rurales y urbanos. Encontramos una asociación positiva entre la minería y los ingresos y gastos de las familias urbanas, pero no de las familias rurales. En este último caso, sin embargo, sí encontramos evidencia de una menor tasa de pobreza relacionada con la presencia minera. Además, hallamos correlaciones negativas entre minería y acceso a servicios de agua y desagüe y una mayor incidencia potencial de enfermedades crónicas y agudas, especialmente en los hogares urbanos.... |
| Tipo: Working or Discussion Paper |
Palavras-chave: Minería; Ingresos de hogares; Conflictos sociales; Sierra; Perú; Mining; Household income; Social conflicts; Highland; Peru; Community/Rural/Urban Development; Industrial Organization; L71; R1; R2. |
| Ano: 2007 |
URL: http://purl.umn.edu/37703 |
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| Bogdanovic,Dejan; Nikolic,Djordje; Ilic,Ivana. |
| Selecting the best mining method among many alternatives is a multicriteria decision making problem. The aim of this paper is to demonstrate the implementation of an integrated approach that employs AHP and PROMETHEE together for selecting the most suitable mining method for the "Coka Marin" underground mine in Serbia. The related problem includes five possible mining methods and eleven criteria to evaluate them. Criteria are accurately chosen in order to cover the most important parameters that impact on the mining method selection, such as geological and geotechnical properties, economic parameters and geographical factors. The AHP is used to analyze the structure of the mining method selection problem and to determine weights of the criteria, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: AHP; Mining; Multicriteria decision making; PROMETHEE. |
| Ano: 2012 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652012000100023 |
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| Cheek, M.. |
| Two new paniculate species of Nepenthes, N. halmahera and N. weda, both allied to N. danseri Jebb & Cheek, are described respectively from lowland and lower montane forest on ultramafic substrate. Nepenthes weda appears to be unique in the genus due to the adaxial tepal surfaces which in the distal portion are hairy and lack nectar glands. This species is also unique among paniculate members of the genus in its forward-facing, concave subapical lid appendage. Both species are currently only known from the Weda Bay Nickel Project concession area in Halmahera, Indonesia, and are assessed as Critically Endangered using the 2012 IUCN standard. Two character states are formally described and named for the first time in Nepenthes: nanophyll rosettes and... |
| Tipo: Article / Letter to the editor |
Palavras-chave: Character state; Critically endangered; Mining; Ultramafic; Weda Bay Nickel Project. |
| Ano: 2015 |
URL: http://www.repository.naturalis.nl/record/578430 |
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| Breitenbach, Raquel; Neumann, Pedro Selvino; Moura, Luciane D. De. |
| Os projetos de intervenção buscam alavancar alternativas que tenham como ponto de partida alocar os recursos das unidades produtivas em prol do desenvolvimento das localidades rurais. Para a formulação desses projetos, os técnicos precisam conhecer exaustivamente o local a ser trabalhado, para isso, é imprescindível que seja lançado também um olhar antropológico acerca da população que compõem a localidade estudada. Nesse sentido, o presente trabalho teve como objetivo identificar, por meio de uma pesquisa de campo, os aspectos antropológicos (o homem e sua história, ciclos de ocupação, crenças, tradições, mitos, religião) da população de Minas do Camaquã, distrito de Caçapava do Sul no estado do Rio Grande do Sul. A metodologia empregada na pesquisa... |
| Tipo: Conference Paper or Presentation |
Palavras-chave: Desenvolvimento rural; Aspectos antropológicos; Mineração; Rural development; Anthropological aspects; Mining; Crop Production/Industries. |
| Ano: 2008 |
URL: http://purl.umn.edu/109786 |
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| Moreira,Geisianny Augusta Monteiro; Vale,Helson Mario Martins do. |
| ABSTRACT Soils of the Quadrilátero Ferrífero are rich in mineral resources, especially gold and iron. Soil management and mining activities greatly impact soil biology. However, studies addressed to the diversity of microorganisms and their ecological role in the recovery of these areas are scarce. This study aimed to assess the yeast occurrence in soils with natural vegetation (Atlantic Forest, neotropical savanna, and iron outcrop) and areas with anthropogenic modifications (Eucalyptus stand and rehabilitated area) in the Quadrilátero Ferrífero region. We isolated and identified a total of 68 yeast. Partial sequencing of the 26S ribosomal gene revealed the presence of six genera: Saitozyma, Pseudozyma, Meyerozyma, Debaryomyces, Lipomyces, and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Diversity; Fungi; Land use; Mining. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0100-06832018000100418 |
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| Guimarães,Lorena Abdalla de Oliveira Prata; Dias,Luiz Eduardo; Rocha,Genelício Crusoé; Assis,Igor Rodrigues de; Fernandes,Raphael Bragança Alves. |
| ABSTRACT Tailings from bauxite washing produced in Porto Trombetas, Pará state, a Brazilian Amazon region, have chemical and physical characteristics limiting the development of plants, which hinders to revegetate the tanks where they are deposited. This study was carried out under field conditions, and aimed to assess the physical quality of these tailings after a decade of recovery practices. Three treatments were assessed: no application of inputs and planting of seedlings (T1) and two levels of fertilization, one with lower (T2) and other with higher (T3) doses of limestone and fertilizers associated with planting tree seedlings. After ten years of experimentation, penetration resistance (PR) and substrate moisture up to 60 cm depth were assessed and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Revegetation; Mining; Natural regeneration.. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1806-66902018000200192 |
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| Frenedozo,Rita de Cássia. |
| Studies were carried out on the phenological patterns and dispersion of a plant community developed naturally after limestone mining operations, in accumulated materials of wastes (spoil banks). The objectives were to focus the seasonality of plant reproductive in a degraded environment; to analyze the community according to dispersal syndrome and to know about plant resources for the animals Monthly observations of flowering and fruiting patterns of the community were done, comparing the herbaceous, shrubs and woody species. Proportion of anemochorous and autochorous was higher in the herbaceous and shrubby strata. The zoochorous ones, on the contrary, were more frequent in the woody stratum. This study showed that natural introduction of the animals at... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Phenology; Mining; Brazil; Plant dispersal; Herbivores; Community. |
| Ano: 2004 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132004000200014 |
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| Registros recuperados: 31 | |
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