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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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| Silva, Sérgio Teixeira da; Mello, José Marcio de; Acerbi Junior, Fausto Weimar; Reis, Aliny Aparecida dos; Raimundo, Marcel Regis; Silva, Iasmim Louriene Gouveia; Scolforo, José Roberto Soares. |
| Remote sensing imagery can be a very useful auxiliary tool for native forests inventory. Thus, the objective of this study was to evaluate the stratification of a cerrado (Brazilian savanna) patch based on visual image interpretation techniques as well as to compare the errors from two sampling designs, the Stratified Random Sampling (SRS) and the Systematic Sampling (SS).The study area corresponds to a cerrado sensu stricto patch located in the municipality of Papagaios, Minas Gerais, Brazil. The cerrado wood volumes were obtained from a forest inventory field campaign where 32 plots were measured systematically. The study area was stratified based on a visual interpretation of a Landsat 5 TM image, and the strata formed were: “Strata I”, “Strata II”,... |
| Tipo: Info:eu-repo/semantics/article |
Palavras-chave: Systematic sampling; Tratified Random Sampling; Visual image interpretation; Remote Sensing Engenharia Florestal; Manejo e Inventário Florestal; Sensoriamento Remoto Amostragem Sistemática; Amostragem Casual Estratificada; Interpretação visual de imagens; Sensoriamento remoto. |
| Ano: 2014 |
URL: http://pfb.cnpf.embrapa.br/pfb/index.php/pfb/article/view/742 |
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