Navegando por Autor "LEFEBVRE, Paul"

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Acesso aberto (Open Access)
Cenários de desmatamento para a Amazônia
(2005-08) SOARES FILHO, Britaldo Silveira; NEPSTAD, Daniel Curtis; CURRAN, Lisa; CERQUEIRA, Gustavo Coutinho; GARCIA, Ricardo Alexandrino; RAMOS, Cláudia de Barros e Azevedo; VOLL, Eliane; MCDONALD, Alice; LEFEBVRE, Paul; SCHLESINGER, Peter; MCGRATH, David Gibbs
THE AMAZON is entering an era of rapid changes as new transportation corridors traverse the region, stimulating the expansion of logging and agricultural frontiers. The declining cost of transportation has important implications for biodiversity, greenhouse gas emissions, and the long-term prosperity of the Amazon society. To analyze this context, we have developed an empirically based, policy-sensitive model of deforestation for the Amazon basin. Model output for the worst-case scenario shows that, by 2050, projected deforestation trends will eliminate 40% of the current 5.4 million km2 of Amazon forests, releasing approximately 32 Pg (109 tons) of carbon to the atmosphere. Results from intermediate-case scenarios indicate that, although an expanded and enforced network of protected areas could avoid as much as one third of projected forest losses, other conservation measures are still required to maintain the functional integrity of Amazon landscapes and watersheds. Current experiments in forest conservation on private properties, markets for ecosystem services, and agro-ecological zoning must be refined and implemented to achieve comprehensive conservation.
Acesso aberto (Open Access)
A pequena produção e a exploração sustentável de madeira na Amazônia
(2007-12) MERRY, Frank; ALMEIDA, Oriana Trindade de; LIMA, Erivelton; NEPSTAD, Daniel Curtis; AMACHER, Gregory; RAMOS, Cláudia de Barros e Azevedo; LEFEBVRE, Paul; RESQUE JÚNIOR, Felipe
This research estimate the potential and importance of the small holder for wood supply to the logging industry in the Transamazonic. Using satellite images, secondary and primary data the research showed the potential and the sustainability of the small production to supply the industry. Using a conservative estimate per hectare it was possible to estimate a area of 841,954 ha per year to exploit in the region which would be equivalent to the production of 10,000 families or 18% of the total estimated family in the region. This is equivalent to 1/25 of the actual estimate of production in the region. In general, the large potential of the small production are overlooked but when calculated for a large region it can show the potential for increase of income and forestry sustainability.