Navegando por Assunto "Secondary forest"

Agora exibindo 1 - 2 de 2

Acesso aberto (Open Access)
Cadeia de comercialização de produtos de floresta secundária dos municípios de Bragança, Capitão Poço e Garrafão do Norte – Pará
(Universidade Federal do Pará, 2007) GOMES, Denyse Maria de Almeida; BRIENZA JUNIOR, Silvio; http://lattes.cnpq.br/1750852376922258; COSTA, Francisco de Assis
Many studies about secondary forest associate it with important bio-geo- chemists functions to degenerated ecosystems in the Amazon basin, transforming it in important component to be preserved in the landscape. To conserve these forest areas, in the last years a lot of studies has been done to demonstrate the secondary forest importance to small holding system. This study characterized commercialization chains of Secondary Forest products, categorized by fruitful (açaí, bacuri, buriti), timber (vegetable coal, firewood and stake), derived of animal (bee honey) and medicinal plants (andiroba, barbatimão, copaíba, sucuúba, unha-de-gato and veronica) in the county of Bragança, Capitão Poço and Garrafão do Norte, in Pará State, Brazil. For each category was studied the commercialized production, gross income generated, mercantile agents involved and commercialization channels structures. The research methodology was based in the Leontief Input-Output Product theory that helps to describes and analyzes the commercialization structures and value aggregation along the productive chain. For this study were used field data collected in 2004. The main results were: identification of well established commercialization chains in informal markets; the mercantile relationships established to the commercialization of secondary forest products exhibit advantages on the agricultural products; and the better gross income accomplishes with direct sale to the final consumer.
Acesso aberto (Open Access)
Estimativas de biomassa e carbono em áreas de vegetação secundária no território paraense
(Universidade Federal do Pará, 2018-06-29) OLIVEIRA JUNIOR, Luis Augusto Lima; KELLER, Michael Maier; http://lattes.cnpq.br/1869582564376606; ADAMI, Marcos; http://lattes.cnpq.br/7484071887086439; https://orcid.org/0000-0003-4247-4477
Land use dynamics is a very intense process in the Amazon landscape because forest areas are constantly targets of deforestation, often illegal, which compromises the environmental balance of this ecosystem. In this context, a widespread element in the region's landscape is secondary vegetation (SV). The SV appears after a disturbance and can evolve and reach the characteristics close to a primary forest. This work aims to generate above-ground biomass and carbon estimates for the SV areas in the State of Pará for 2014. The methodology uses the variable GSDY (Growing-Season Degree-Years), calculated by SV age (TerraClass), temperature, and precipitation. The variable GSDY is part of a model proposed by Johnson et al. (2000) and Zarin et al. (2001), which generates above-ground biomass and carbon estimates. VS was classified into five classes according to its age. More than 6.9 million hectares of VS were mapped in the State of Para, representing more than two billion tons (t) of biomass (one million t of carbon) contained in VS. More than 2.8 million hectares of VS were vulnerable in 2014 because of SEMAS – PA Normative Instruction that enables cleaning these areas five years old or less (except those protected by law), with no environmental authorization needed. The SV loss could represent a considerable carbon emission to the atmosphere and massive damage to this region's balance.