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Showing items 1 through 9 of 1218.
  1. Library Resource
    Conference Papers & Reports
    July, 2008

    Esta pesquisa aborda a atividade madeireira sob o regime de concessão florestal desenvolvido no Estado do Acre. Os objetivos do presente estudo são: identificar o custo da produção do manejo florestal sustentável (MFS) para produção madeireira, tendo como base a Floresta Estadual do Antimary (FEA); e, quantificar o valor, a ser pago pela terra, numa área destinada como floresta pública de produção, no ano de 2005. Para tal, foi considerada, como premissa básica, um ciclo de corte de 15 anos.

  2. Library Resource
    Journal Articles & Books
    December, 2010

    The process of natural regeneration in an area degraded for the construction of the Camargos hydroelectric plant dam, MG, was analyzed 155 months after the planting for its reclamation. The analyses were done in function of the distance to the river, soil compaction and distance of the seed sources. The survey of the natural regeneration was done in plots of 2 x 15m allocated every 10m along three transects (15m width and variable length) parallel to the slope direction. All plants with DBH < 5cm and height 10cm were identified and measured in height.

  3. Library Resource
    Journal Articles & Books
    December, 2004
    Brazil

    The vegetation cover plays a key role in protection and conservation of natural resources, particularly concerning soils. This study had as objective to analyze space and time dimensions of anthropic influence on the vegetation cover in part of the semi-arid region of the Ceará State, Brazil. LANDSAT TM-5 satellite images of 1985 and 1994 combined with geoprocessing techniques were used to verify the hypothesis of intensification of environmental degradation. Maps of the vegetation cover, land use, soils, and hydrography were elaborated.

  4. Library Resource
    Journal Articles & Books
    December, 2010
    Brazil

    Rural settlements in Brazil were created in order to confront pressures and are characterized by the lack of planning prior to the diagnosis and implementation of the natural resources related to land suitability evaluation, distribution of classes such as topography, rivers system, vegetation, and support mechanisms.

  5. Library Resource
    Journal Articles & Books
    December, 2007

    The advance of the agricultural frontier, characterized by the conversion of natural ecosystems into cultivated areas, was intensified in the last decades. Most of the practices used to manage soils cause changes in the soil quality and soil organic matter (SOM) dynamics. Studying the impact of different management systems is essential to choose the most adequate soil management practices.

  6. Library Resource
    Conference Papers & Reports
    July, 2008
    Brazil

    O MIMES – Multi-scale Integrated Model of the Earth Sytems Ecological Services é o primeiro modelo global a relacionar a dinâmica entre a tecnologia, produção e bem-estar econômico e os bens e serviços ecossistêmicos do sistema dinâmico da Terra, de forma espacializada. É um “meta-modelo” que representa uma síntese de uma simplificação dos diversos modelos globais dinâmicos existentes nas ciências naturais e sociais em um nível intermediário de complexidade. O objetivo do MIMES é simular o sistema integrado da Terra e avaliar a dinâmica e os valores dos serviços dos ecossistemas.

  7. Library Resource
    Conference Papers & Reports
    July, 2008

    A água é essencial à sobrevivência humana. Uma economia política humanizada, isto é dirigida para a satisfação das necessidades básicas, deve preocupar-se com a questão da disponibilidade e distribuição de água. No que diz respeito à satisfação das necessidades básicas, podemos afirmar que é relativamente fácil e barato fornecer água para todos. Porque razão, então existe uma desigualdade na distribuição? Esta desigualdade representa uma violação séria de um direito humano, como será desenvolvido à frente, e não deverá ser tolerada.

  8. Library Resource
    Journal Articles & Books
    December, 2005
    Brazil

    With the objective of verify the remainders influence of ciliary vegetation and of the human action on the water quality, four springs were studied, with two springs on presence of remaining natural vegetation and two springs with agricultural activities predominance. These springs are part of Córrego Rico watershed, being located in the municipal districts of Taquaritinga and Guariba, São Paulo State, Brazil, in two classes of soil: argisoil and latosoil, respectively.

  9. Library Resource
    Journal Articles & Books
    December, 2007

    The objective of this study was to analyze the growth of tree species planted in a topographic gradient in an area degraded for the construction of the dam of Camargos Hydroeletric plant, MG. At 155 months after planting, three transects following the slope, 15 m wide and variable length were allocated, subdivided in parcels of 12 x 15 m along the topographic gradient. Plants with diameter at breast height (DBH) 5 cm were identified and measured (DBH and height).

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