|
|
|
|
|
| PÉLLICO NETTO,SYLVIO; SANQUETTA,CARLOS R.; CARON,BRAULIO O.; BEHLING,ALEXANDRE; SIMON,AUGUSTO A.; CORTE,ANA PAULA D.; BAMBERG,ROGÉRIO. |
| ABSTRACTThe objective is to study the dynamics of photosynthetic radiation reaching the soil surface in stands of Acacia mearnsii De Wild and its influence on height growth in stands. This fact gives rise to the formulation of the following hypothesis for this study: "The reduction of the incidence of light inside the stand of black wattle will cause the inflection point in its height growth when this reaches 4 to 5 m in height, i.e. when the stand is between 2 and 3 years of age". The study was conducted in stands in the state of Rio Grande do Sul, Brazil, where diameters at breast height, total height and photosynthetically active radiation available at ground level were measured. The frequency tended to be more intense when the age of the stands... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Burr function; Light intensity; Probabilistic models; Temporal variation. |
| Ano: 2015 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652015000401833 |
| |
|
|
| BEHLING,ALEXANDRE; PÉLLICO NETTO,SYLVIO; SANQUETTA,CARLOS ROBERTO; CORTE,ANA PAULA D.; AFFLECK,DAVID L.R.; RODRIGUES,AURÉLIO L.; BEHLING,MARCOS. |
| ABSTRACT It is presented the theme additivity of biomass of tree components. To evaluate and discuss this context, experimental information collected in forests of Acacia mearnsii De Wild. was used. Equations for components (stem and crown) and total biomass were fitted by means of two procedures: 1) generalized nonlinear least squares and 2) weighted-nonlinear seemingly unrelated regressions. Analyzing the performance of the estimators, it can be concluded that the two tested procedures are equivalent. On the other hand, this conclusion differs when evaluated the consistency and efficiency of the estimators. Fitting equations for the components and for the total biomass by an independent way is not realistic, because from a biological point of view the... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Biomass; Biological consistency; Non-linear regression; System of equations. |
| Ano: 2018 |
URL: http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0001-37652018000401759 |
| |
|
|
| 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 |
| |
|
| |
|
|
|
