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| NETTO,SYLVIO P.; PELISSARI,ALLAN L.; CYSNEIROS,VINICIUS C.; BONAZZA,MARCELO; SANQUETTA,CARLOS R.. |
| ABSTRACT The spatial distribution of tropical tree species can affect the consistency of the estimators in commercial forest inventories, therefore, appropriate sampling procedures are required to survey species with different spatial patterns in the Amazon Forest. For this, the present study aims to evaluate the conventional sampling procedures and introduce the adaptive cluster sampling for volumetric inventories of Amazonian tree species, considering the hypotheses that the density, the spatial distribution and the zero-plots affect the consistency of the estimators, and that the adaptive cluster sampling allows to obtain more accurate volumetric estimation. We use data from a census carried out in Jamari National Forest, Brazil, where trees with... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Adaptive cluster sampling; Spatial species distribution; Volume estimation; Zero-plots. |
| Ano: 2017 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652017000401829 |
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| RODRIGUES,CARLA K.; LOPES,EDUARDO S.; SILVA,DIMAS A.; FIGUEIREDO FILHO,AFONSO; PELISSARI,ALLAN L.. |
| Abstract: Biomass is an important component of the Brazilian energy matrix, with a potential contribution of co-products from thinned forests. The aim of this work was to evaluate the energy balance and CO2 potential emission in mechanized biomass harvesting operations in Pinus taeda stands at 9 and 10 years-old and under thinning, searching to support the use of co-product biomass from thinning as a renewable energy source. Thinning was carried out through cut-to-length harvesting method, in which large logs for sawmill and small logs for energy were produced. In addition, tops, needles, barks, and branches were considered as co-products. The balance between consumed energy and emitted CO2 by machines for thinning in relationship to the energy and CO2 in... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass energy; Co-product forest biomass; Forest harvesting; Sustainability. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700861 |
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| NETTO,SYLVIO PÉLLICO; STEFANELLO,FLAVIO R.; PELISSARI,ALLAN L.; DAVID,HASSAN C.. |
| Generally, the forest companies use the total one year planting area as a minimum stratum of the total population and, consequently, the forest inventory processing has been conducted by applying the stratified random sampling to it. This study was carried out in the National Forest of Tres Barras, Brazil, and it aimed to classify and map the sites of Pinus elliottii stands. A systematic sampling was structured into clusters and applied independently by compartments. The clusters, in maltese cross, were composed of four sampling subunits, using Prodan sampling method with a fixed number of six trees. By analysis of the methodology it was possible to confirm the hypothesis: a) the selective thinning cause expressive increase of volumetric variability within... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Pinus elliottii; Prodan's sampling method stratification by sites spatial variation. |
| Ano: 2014 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652014000402025 |
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| PÉLLICO NETTO,SYLVIO; PELISSARI,ALLAN L.; BRIBEIRO,ANDRESSA; MACHADO,SEBASTIÃO A.; NASCIMENTO,RODRIGO G.M.. |
| Abstract Woody debris, defined as standing and downed deadwood, consists in an essential component of the forest carbon stock. However, few studies have been carried out to get an efficient and accurate sampling procedure for estimating it. This work proposes two methodologies to estimate the woody debris volume in a Brazilian mixed tropical forest: 1) two-stage systematic sampling, using a mixed methodology, in which the Strand’s method is applied to standing dead trees and stumps, and line intercept sampling is used to fallen trees and branches; and 2) ratio estimate of the sum of cross-sectional areas of deadwood pieces and forest basal area, aiming to obtain the total woody debris volume indirectly in the natural forest. Conversions for biomass and... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Line intercept sampling; Ratio estimate; Systematic sampling; Strand’s method. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000703769 |
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| RODRIGUES,CARLA K.; LOPES,EDUARDO S.; FIGUEIREDO FILHO,AFONSO; PELISSARI,ALLAN L.; SILVA,MATHEUS K.C.. |
| Abstract: The lack of accurate models for estimating residual biomass in wood harvesting operations results in underutilization of this co-product by forestry companies. Due to the lack of this information, forestry operations planning, such as chipping and transport logistics, are influenced, with a consequent increase in costs. Thereby, the aim of this study was to propose and evaluate statistical models to estimate residual biomass of Eucalyptus sp. in wood harvesting operations by means of tree variables measured from harvester processing head. Generalized linear models were composed through stepwise procedure for estimating residual biomass by tree covariates: diameter at breast height, commercial height, commercial limit diameter, and stem commercial... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Bioenergy; Full-tree harvesting method; Forest measurement; Forest planning.. |
| Ano: 2019 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652019000700867 |
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