12 documents found, page 1 of 2

Phytosociology and the timber potential of transitional ecosystems from foreste...

Transitional forest ecosystems in the south of the state of Roraima show great heterogeneity of tree species and represent different volumes of timber stock in projects of vegetation suppression requiring Deforestation Licences (DL). The aim of this study was to evaluate the phytosociology and standing timber volume in ecosystems of Submontane Dense Ombrophilous Forest (Ds) and transitional Campinarana/Ombrophi...

Avaliação dos impactos na vegetação após a exploração madeireira em floresta om...

Changes on floristic composition and phytosociological and damage we evaluated in forest subjected to reduced-impact logging (RIL) in the municipality of Caracaraí in the state of Roraima. The experiment consisted in the installation of nine permanent plots (1 ha each), under the completely randomized design with three replications and three treatments (T1 = natural forest; T2 = forest subjected to reduced-impa...

Illegal selective logging and forest fires in the northern Brazilian Amazon

Illegal selective logging and forest fires occur on a large scale in the northern Brazilian Amazon, contributing to an increase in tree mortality and a reduction in forest carbon stock. A total of 120 plots of 0.25 ha (30 ha) were installed in transitional ecosystems or ecotones (LOt) between the forested shade-loving campinarana (Ld) and dense-canopy rainforest, submontane (Ds), in the National Forest (Flona) ...

Padrão espacial de espécies madeireiras da Amazônia pelo método de coordenadas ...

Spatial distribution of forest biomass in Brazil's state of Roraima, northern A...

Forest biomass is an important variable for calculating carbon stocks and greenhouse gas emissions from deforestation and forest fires in Brazilian Amazonia. Its spatial distribution has caused controversy due to disagreements over the application of different calculation methodologies. Standardized networks of forest surveys provide an alternative to solve this problem. This study models the spatial distributi...

Açaí fruit production and carbon stock in managed plantations in Southeast of R...

The quantification of the carbon stock present in fruits and residues from the manufacture of açaí pulp provides an estimate of the contribution of these key-species to the Amazonian ecosystem to maintain the Earth’s climatic balance. Thus, this work aimed to evaluate the production and carbon stock, based on factor 0.5, developed by the Intergovernmental Panel on Climate Change (IPCC), present in açaí (Euterpe...

PORCENTAGEM DE CERNE, ALBURNO E CASCA DE CINCO ESPÉCIES MADEIREIRAS DA AMAZÔNIA

Uma das questões mais antigas e deficitárias de estudos técnicos no setor florestal diz respeito ao coeficiente de rendimento volumétrico (CRV) de espécies florestais tropicais, no processo de desdobro da madeira em tora. Este coeficiente é influenciado pela proporção de cerne, alburno e casca presentes na madeira. O objetivo deste estudo foi determinar a porcentagem destas variáveis para cinco espécies madeire...

Caracterização morfométrica de árvores solitárias de Bertholletia excelsa H.B.K...

Para manejar espécies florestais nativas, é necessário conhecer tanto as características quanto a dinâmica das árvores ao longo do tempo, bem como suas relações morfométricas a fim de aperfeiçoar as técnicas silviculturais. Assim, objetivou-se com o presente trabalho avaliar as características morfométricas de árvores solitárias de castanheira-do-brasil (Bertholletia excelsa H.B.K), nos municípios de São João d...

Spatial pattern of Amazonian timber species using cartesian and spatial coordin...

Geographic information system (GIS) applied to forest analysis permit the recognition and analysis of spatial patterns of species in two and three dimensional. The aim of this study to demonstrate the efficiency of cartesian and spatial coordinates method (MCCE), method of correcting UTM coordinates of trees location in accordance with the location of field or Cartesian (X ,Y), combined with natural neighbor in...

MODELOS ESTATÍSTICOS PARA ESTIMATIVA DO VOLUME DE ÁRVORES DE Parkia gigantocarp...

Os modelos estatísticos são fundamentais para a estimativa dos volumes das árvores e consequentemente para o planejamento das empresas florestais. O objetivo do estudo foi testar e selecionar modelos estatísticos para a estimativa do volume individual de árvores da espécie fava barriguda (Parkia gigantocarpa Ducke) em plantios no estado do Mato Grosso. Foram utilizadas 30 árvores de um plantio experimental. As ...