Navegando por Assunto "Serra do Navio - AP"

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Acesso aberto (Open Access)
Filogeografia em lagartos no baixo Tocantins, Ilha do Marajó e Sul do Amapá
(Universidade Federal do Pará, 2008) SOUZA, Ana Carla Barros de; GONÇALVES, Evonnildo Costa; http://lattes.cnpq.br/8652560763793265; ÁVILA-PIRES, Teresa Cristina Sauer de; http://lattes.cnpq.br/1339618330655263
Filogeographical studies have helped to clarify the spatial and temporal context of the diversification of organisms from Amazonian, which can be directly compared with specific geological scenarios. This study aims to contribute with the reconstitution of the recent history of low Tocantins/Marajó Island from a philogeographical analysis of Gonatodes humeralis and Kentropyx calcarata. The questions to be answered are whether there is a distinction among the population of the southern Amapá, Marajó Island, and each side of the Tocantins river, and how these populations interrelate one each other. In addition, this work also aims to assess the usefulness of the gene cytochrome oxidase I as a marker for studies of lizard populations. Data from 49 specimens of G. humeralis and 32 of K. calcarata from 14 localities in southern Amapá, low Tocantins, Marajó Island, and of an external population of the focal area of study, in the city of Itaituba, Pará, were analyzed. The molecular studies were based on mitochondrial gene cytochrome oxidase I. The levels of genetic variability were calculated: diversity of nucleotides (π) and diversity of haplotypes (h), the genetic differentiation through the analysis of molecular variance (AMOVA) and the estimates of Fst for pairs of populations and distribution of the differences between pairs of sequences. It was used a statistical test to detect possible R2 events of recent demographic expansion. The phylogenetic relations between populations were evaluated by the construction of non-rooted trees using the methods of maximum parsimony (MP) and maximum likelihood (MV). The results show that although the COI has been rarely used for this purpose, the observed variation in sequences of populations of G. humeralis and K. calcarata indicates that it is a useful marker for Phylogeographic analysis. The five populations of both species studied here, are genetically structured. This indicates a low or, more probably, inexistent gene flow among them. The observed Phylogeographic relations, although more certainly to G. humeralis than K. calcarata, indicates that significant changes have occurred in relatively recent times in the drainage system in the low Tocantins river and Marajo island. This is due strong indications, obtained in this study, that in recent past there was more movement, active or passive, of the species between regions of Marajo and west of the Tocantins river that would have been the most directly affected by these changes.
Acesso aberto (Open Access)
A ICOMI no Amapá: meio século de exploração mineral
(2003-12) MONTEIRO, Maurílio de Abreu
This article analyzes the half-a-century history of manganese mining in Serra do Navio, Amapá, Brazil, in the second half of the twentieth century, by Indústria e Comércio de Minérios S.A. (ICOMI). It points out the fact that internalization of added value to the mining process was limited. The text also indicates that existing literature on the repercussions of this activity on regional development is insufficient. The article concludes by highlighting that an open research agenda exists regarding analysis of institutional arrangements that block or limit development of the region based on adding value to manganese mining from taking root socially.
Acesso aberto (Open Access)
Políticas públicas, turismo e unidades de conservação municipais: uma experiência em Cancão, Serra do Navio, Amapá
(Universidade Federal do Pará, 2010-04-06) ALBERTO, Diana Priscila Sá; SIMONIAN, Ligia Terezinha Lopes; http://lattes.cnpq.br/6620574987436911
This work, entitled "Public policies, tourism and municipal conservation units: an experience in Cancao, Serra do Navio, Amapa" deals with the issue of public policy for tourism and environment, focusing on discussion of new categories of study which are the units of conservation municipal (UCM), dealing with the Municipal Natural Park of the song, and highlights a brief analysis of the social-cultural city, which was the first city-company mineral exploration in the Amazon. The objective of this research is to analyze the dynamics of tourism and environmental management, focused on the UCM in the municipality of Serra do Navio, emphasizing well as being the issue is socio-cultural city, from a context that was once a company. The methodology of the work consisted of literature and documents in Belem /PA and Macapa / AP; field research in the city of Serra do Navio, using interviews and questionnaires with the municipal and state governments, private sector, and the community at large, doing well, visual record of the residents of the locality and finally the data analysis, quantitative and qualitative, from the collection field. Preliminary results indicate that tourism is gradually inserting itself in the city, and encouraged by the state government and also municipal, and environmental issues is a significant issue for the town as it is has one of the first places to feature UCM northern Brazil, and finally, that the company still has a mountain great memory about the experiences of the former mining.