Agricultural Ecosystem
Mostrando 25-36 de 59 artigos, teses e dissertações.
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25. Avaliação do efeito de borda sobre a vegetação do cerrado stricto sensu inserido em matriz de pastagem / Edge effects on plant community of cerrado sensu stricto inserted into a matrix of pasture
From the Brazilian biomes, the Cerrado has been the most widely and rapidly converted to agribusiness in recent years. The expansion of agricultural frontier over the Cerrado domain resulted in thousands of small fragments embedded in matrices of low similarity, causing a series of negative impacts on the natural ecosystem. Habitat fragmentation is considere
Publicado em: 2010
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26. O papel das lideranças comunitárias em projetos de saúde e ambiente : uma análise das redes sociais em comunidades do Rio Tapajós, Pará
Deforestation practices in Amazon region lead to the development of two health problems related to inappropriate land use. One of them is mercurial contamination, which occurs through the erosion and lixiviation of the soil, when the mercury naturally found on the ground of the region contaminates the aquatic eco-system, accumulating in the trophic chains re
Publicado em: 2009
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27. Estudo da influência da urbanização na condição hídrica da Bacia do Rio do Cobre - Salvador-Bahia / Study of the influence of urbanization on water status of the Copper River Basin -Salvador-Bahia
This dissertation focuses the influence of the process of urbanization in urban basin. The study encloses the Basin of River Cobre, situated in the geographic region of the Rail Suburb, in Salvador city, Bahia State. Two objectives were defined: to study the influence of the process of urbanization in the generation of factors which impact the quality of wat
Publicado em: 2009
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28. Effects of changes in land use of the Brazilian Amazon on the ecological services provided by EscarabeÃneos (Coleoptera, Scarabaeidae). / Efeitos da alteraÃÃo do uso do solo na Amazonia Brasileira sobre serviÃos ecolÃgicos proporcionados pelos Scarabaeinae (Coleoptera, Scarabaeidae)
Ecosystem services provided by the biodiversity are that ones associated to live organism and that, in last analysis, affect natural process of human interest. Scarabeine dung beetles has been in evidence in the last years in function of the array of services provided, both in natural as in agricultural landscapes. This work aimed to evaluate the effect of l
Publicado em: 2009
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29. Levantamento ambiental e pesqueiro dos rios Jaboatão e Pirapama no Estado de Pernambuco, Brasil
The increasing human populations that live on, work with and use resources of coastal areas place pressure on these resources, which, together with pressure from natural sources, must be monitored and understood in order to ensure the preservation of the environment and maintenance of quality of life. The rivers that empty along the coast of the state of Per
Publicado em: 2009
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30. AvaliaÃÃo das concentraÃÃes de elementos quÃmicos nos sedimentos de fundo do estuÃrio do Rio Formoso (PE)
The estuary of Formoso river is located in the south coastal zone of the Pernambuco state, in an environmental protection area, named APA of Guadalupe. This is an important coastal ecosystem with a rich biodiversity, which plays an important socioeconomic role for the local population. Anthropogenic activities such as shrimp farming, sugar cane cultivation,
Publicado em: 2009
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31. ATIVIDADE DA ENZIMA REDUTASE DE NITRATO EM TRÊS ESPÉCIES DE CAMPOS FERRUGINOSOS (CANGA) RESPONDE A FERTILIZAÇÃO NITROGENADA
Human activities have increased considerably the input of nitrogen in soils of agricultural and natural systems, may cause profound changes in physiology, morphology and ecology of plants. In this context, the activity of nitrate reductase (NR) becomes an important tool for understanding plant responses to increased N availability in soils through atmospheri
Publicado em: 2009
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32. A visão da população de Mostardas e Tavares - RS sobre a contribuição do turismo no Parque Nacional da Lagoa do Peixe ao desenvolvimento local
The National Park of Lagoa do Peixe is a protected area that is located between Mostardas and Tavares cities, at middle and south coast of the estate of Rio Grande do Sul, Brazil, 230km from Porto Alegre. The region where it is inserted has an economy based on agriculture, mainly of the onion and the rice, livestock and fishing. Also the plantations of pinus
Publicado em: 2009
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33. Estoque e qualidade da matéria orgânica do solo em áreas cultivadas com café sob sistemas agroflorestal e a pleno sol / Soil organic matter stock and quality in agroforestry and full sun coffee systems
Soil organic matter (SOM) restoring is considered a main goal in the enhancement of soil quality. The evaluation of changes in the SOM as a result of soil management practices is fundamental to identify strategies to increase agricultural production, avoiding soil degradation and decreasing the emission of greenhouse gases. In Brazil, no-tillage has been bro
Publicado em: 2009
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34. POLÍTICAS PÚBLICAS E TERRITÓRIO: UMA DISCUSSÃO SOBRE OS DETERMINANTES DA EXPANSÃO DA SOJA NO SUL DO AMAZONAS / TERRITORY AND PUBLIC POLICY: A DISCUSSION ON THE DETERMINANTS OF EXPANSION OF SOYBEANS IN THE SOUTH OF THE AMAZON
The thesis aims at understanding the dynamics of soy expansion in the Amazon State, in Brazil, by identifying and characterising the politico-institutional arrangement responsible for the socio-spatial transformations that promoted the reorganisation of the use of the territory and of its resources. The issue of soy expansion is approached by relating, oppos
IBICT - Instituto Brasileiro de Informação em Ciência e Tecnologia. Publicado em: 18/08/2008
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35. Metaproteomic and biochemistry hydrocarbons and heavy metals-contaminated soils / Metaproteomica e bioquimica de solos contaminados por hidrocarbonetos e metais pesados
Hydrocarbons, heavy metals and agricultural defensives are high risk pollutants to human health. These pollutants are constantly introduced into the environment as a result of petrochemical, industrial, agricultural activities and our modern life style, requiring remediation processes that are used to their complete elimination. Bioremediation is a process c
Publicado em: 2008
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36. AVALIAÇÃO DE IMPACTOS AMBIENTAIS DA SOJICULTURA EM UM ECOSSISTEMA AQUÁTICO DA MICRORREGIÃO DE CHAPADINHA, MA / EVALUATION OF ENVIRONMENTAL IMPACTS OF SOJICULTURA IN AN AQUATIC ECOSYSTEM OF MICRO-REGION OF CHAPADINHA, MA.
EVALUATION OF ENVIRONMENTAL IMPACTS OF SOJICULTURA IN AN AQUATIC ECOSYSTEM OF MICRO-REGION OF CHAPADINHA, MA. The studies were accomplished in in the micronbasin of the Rio Preto, affluent for the right side of the basin of the Rio Munim. The Rio Preto is born to the south of the city of Buriti, coordinated: 356 41.96" South and 43 2 31.40" West. After to co
Publicado em: 2008