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 - 2 de 2

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.
Acesso aberto (Open Access)
A vida flutuante na várzea: readaptação como elemento fundamental para a conservação de recursos aquáticos
(Universidade Federal do Pará, 2016-05-06) ROMAGNOLI, Fernanda Carneiro; CASTRO, Fabio Fonseca de; http://lattes.cnpq.br/5700042332015787; PEZZUTI, Juarez Carlos Brito; http://lattes.cnpq.br/3852277891994862
The world's social environmental crisis requires other forms of society's relationship with nature. More integrated models of Economy and Society to nature have become a challenge. Facing this necessity, look for people who maintain a close relationship with nature even in the context of modernity, may indicate possible ways. The overall goal of this study was to understand how the perception and the relationship between Agua Preta community (Santarém, Para) with aquatic fauna can contribute to management and conservation plans. The specific goals were: 1) to understand the historic construction of the relationship between the Agua Preta community people and the aquatic fauna; (2) to comprehend the starting up of conflicts involving community and the aquatic fauna; (3) to investigate how conflicts involving the aquatic fauna affects the management possibilities; 4) to demonstrate and understand plural values existing on the relation between riverine people and aquatic fauna ; 5) to verify how the plural values existing on the relationship between riverine people and aquatic fauna affects the possible ways of use and management of natural resources; 6) to establish the correlation between the perception and relationship of the Agua Preta comunity residents and the aquatic fauna with local comprehension of development. The methodology was based on the local resident’s perception, through direct observation, open and semi-structured interviews and documental analysis. The results showed that the collective identity of Agua Preta community is a mobile identity that can combine historical social values with the transformations of the scenario where they are living. This kind of identity has implications on the established relation with the aquatic fauna, on the perceptions and on his attributed values, enhancing the values plurality. This plurality is associated to the resilience capacity of the group, but is also associated to the vulnerability increasing, because of the increase empowerment of different interests. On this way, a historically resilient management system would have more and more reduced his capacity of response. In spite of this, the reconstruction of community adaptive capital based on the social memory and the social learning can help this community to recover and reinforce his adaptive way of management and governance of his resources. The conclusion is that the way of living of Agua Preta community can show the way to different forms of development beyond the modernity.

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