Teses em Desenvolvimento Sustentável do Trópico Úmido (Doutorado) - PPGDSTU/NAEA

URI Permanente para esta coleçãohttps://repositorio.ufpa.br/handle/2011/2297

O Doutorado Acadêmico em Desenvolvimento Sustentável do Trópico Úmido pertence ao Programa de Pós-Graduação em Desenvolvimento Sustentável do Trópico Úmido (PPGDSTU) do Núcleo de Altos Estudos Amazônicos (NAEA) da Universidade Federal do Pará (UFPA). O Doutorado em Ciências – Desenvolvimento Socioambiental iniciou em 1994, absorvendo o debate crítico de ponta na época nos temas sobre desenvolvimento, planejamento e questões ambientais.

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Agora exibindo 1 - 3 de 3

Acesso aberto (Open Access)
Entre o ouro e a biodiversidade: garimpos e unidades de conservação na região de Itaituba, Pará, Brasil
(Universidade Federal do Pará, 2014) BAIA JÚNIOR, Pedro Chaves; THEIJE, Marjo de; http://lattes.cnpq.br/3764097351224416; MATHIS, Armin; http://lattes.cnpq.br/8365078023155571
Examines the policies and practices of small-scale gold mining (SSGM) and protected areas (PA) performed in the region of Itaituba (Pará), and understand the impacts of the Brazilian nature conservation policy on practices developed in the small mining Amazon context. Historical and comparative methods were utilized. Documentary and bibliographical searches, semi-structured interviews with social actors involved in the issues, and data collection on websites of public agencies were conducted. The results show that the creation of a federally set of PA in the region of Itaituba, in 2006, was a response to international public opinion on the high rates of deforestation in the Amazon verified at the beginning of the century, but that resulted in direct conflict with institutions and local social actors linked to SSGM, which considered this action authoritative and impediment to regional economic development action. Despite PA have been superimposed over the 80% of areas of interest and/or gold exploration in the region of Itaituba, this conservation policy has not prevented the continuity of SSGM in the region. However, it was found that such police put into play a series of elements that increased the difficulties to regulate their activity and prospector are forcing it to remain or be directed to the illegality. The main barriers identified for the planning of mining activity in the region of Itaituba were: the physical distances between the mines and the environmental agencies, the delay in issuing environmental permits (small-scale/alluvial mining licence, for exemple), difficulties in meeting the legal requirements, and uncertainties about mining within the PA, especially National Forests. Moreover, it was found that the PA did not leave the paper, since they lack staff, infrastructure and financial resources to the minimum compliance for surveillance, education and regulation, for example, the mining activity that occurs inside. Thus, although the federal government has created the PA as an alternative to a process of sustainable development for the region, in practice these protected areas are only creating legal barriers to the continuation of an important regional productive activities without providing alternative livelihoods to users of this resource.
Acesso aberto (Open Access)
Planeamiento socioambiental de grandes hidroeléctricas y sus repercusiones en la Amazonia brasileña
(Universidade Federal do Pará, 2004-04-22) VALDEZ PIZARRO, José Jorge; MCGRATH, David Gibbs; http://lattes.cnpq.br/4373475491613670
Acesso aberto (Open Access)
Regeneração florestal associada a tamanhos de clareiras: implicações para o manejo florestal sustentável
(Universidade Federal do Pará, 2006-05-30) PINTO, Andréia Cristina Brito; AZEVEDO-RAMOS, Claudia; http://lattes.cnpq.br/1968630321407619
The conviction on the capacity of forest regeneration is one of the backbones of the sustainable forest management in a long term. The performance of the regenerative process, however, depends on the damage intensity of the logging activity, which can be reduced according to science-base interventions on suitable criteria to direct the good practices. In this sense, the aim of this study is to evaluate the effect of different sizes of logging gaps on forest regeneration. The study was carried out in eastern Amazonia (Paragominas, Pará state, Brazil). We evaluated and monitored links of the regenerative process (e. g., herbivores vertebrate, seed rain, climatic factors) and/or others direct attributes of the regeneration (e. g., plant density, species richness, growth, recruitment, mortality) in two study sites. At Rio Capim ranch, with recent logging, fifteen 1.3 year old logging gaps were selected in an area of 300 ha of reduced impact logged forest and monitored for fifteen months. These gaps comprised three size categories: five small gaps (30-100 m2), five medium gaps (500-800 m2) and five large gaps (> 1.500 m2). At Cauaxi ranch, with old logging activity, twelve 8.5 years old logging gap had the direct attributes of its regeneration evaluated. The size categories were as above, except the larger gaps were smaller (1,000-1,400 m2). Our prediction is that higher species richness will occur in places of intermediary disturbances, in this case, in medium gaps (sensu Connell, 1978). Overall, this hypothesis was not confirmed. In Rio Capim ranch (1.3 year post-logging), although the larger gaps presented the lowest plant richness, the medium gaps were not the richest in species. Larger gaps showed more divergences to closed forest (control), they had higher temperatures, higher density, higher plant height growth, and higher vine growth. In medium gaps, the vines and pioneers species had also higher growth than in closed forest. The small gaps were more similar to closed forest, only differing on its higher pioneer density and growth (except vine growth). Both the seed rain and the impact of the herbivores on regeneration were indifferent to gap sizes, but show dependence on punctual features, such as presence of feeding sources to fauna and to seed production. The old gaps of Cauaxi ranch showed no significant differences among sizes and closed forests. Comparatively, the old gaps had lower density and higher relative species richness than younger gaps. According to our results and their potential implications to forest regeneration, the main recommendation of this study is that large gaps must be avoided. The small and medium gaps congregate more fortunate attributes to the sustainability of the timber management.

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