SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA
Autor(a) principal: | |
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Data de Publicação: | 2018 |
Outros Autores: | , , , , |
Tipo de documento: | Artigo |
Idioma: | eng |
Título da fonte: | Cerne (Online) |
Texto Completo: | https://cerne.ufla.br/site/index.php/CERNE/article/view/1828 |
Resumo: | The objective of this study was to analyze the adaptive cluster sampling (ACS), simple random sampling (SRS) and systematic sampling (SS) processes to obtain the number of ha-1 trees of Carapa guianensis Aubl. in the Amazon. The data were obtained through 100% inventory and sampling simulations, considering a DBH ≥ 25 cm, a sampling intensity of 4%, a maximum error of 10% and plots of 0.09, 0.16 and 0.25 ha. The last two sizes were only used to analyze their effect on the ACS estimators. The processes were evaluated for accuracy, precision (E%) and confidence interval (CI), while the mean ha-1 of the processes were compared with that of the 100% inventory by the Z test. The ACS process showed no significant difference between its average ha-1 trees and the 100% inventory, and it was also the most accurate and the only one whose CI was true. However, it presented a final sample intensity 3.6 times greater than the simple and systematic random samplings, in addition to E% above 10%, which makes it unacceptable, legally, and economically unfeasible. The other processes had densities significantly higher than the 100% inventory, with sample intensities lower than ACS and E% lower than 10%, making them legally viable. The use of larger plots in the ACS implies larger clusters and a greater tendency to underestimate the number of trees, resulting in larger sample errors and less accuracy. |
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SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBAPROCESSOS DE AMOSTRAGEM PARA Carapa guianensis Aubl. na Amazônia: PROCESSOS DE AMOSTRAGEM PARA ANDIROBAAdaptive cluster samplingSimple random samplingSystematic samplingnSAMPLING PROCESSES; ECOLOGYAdaptive cluster samplingSimple random samplingSystematic samplingnPROCESSOS DE AMOSTRAGEMECOLOGIAThe objective of this study was to analyze the adaptive cluster sampling (ACS), simple random sampling (SRS) and systematic sampling (SS) processes to obtain the number of ha-1 trees of Carapa guianensis Aubl. in the Amazon. The data were obtained through 100% inventory and sampling simulations, considering a DBH ≥ 25 cm, a sampling intensity of 4%, a maximum error of 10% and plots of 0.09, 0.16 and 0.25 ha. The last two sizes were only used to analyze their effect on the ACS estimators. The processes were evaluated for accuracy, precision (E%) and confidence interval (CI), while the mean ha-1 of the processes were compared with that of the 100% inventory by the Z test. The ACS process showed no significant difference between its average ha-1 trees and the 100% inventory, and it was also the most accurate and the only one whose CI was true. However, it presented a final sample intensity 3.6 times greater than the simple and systematic random samplings, in addition to E% above 10%, which makes it unacceptable, legally, and economically unfeasible. The other processes had densities significantly higher than the 100% inventory, with sample intensities lower than ACS and E% lower than 10%, making them legally viable. The use of larger plots in the ACS implies larger clusters and a greater tendency to underestimate the number of trees, resulting in larger sample errors and less accuracy.O objetivo desse estudo foi analisar os processos de amostragem adaptativo em cluster (AAC), amostragem casual simples (ACS) e amostragem sistemática (AS) para obter o número de árvores ha-1de Carapa guianensis Aubl. na Amazônia. Os dados foram obtidos por meio de inventário 100% e simulações de amostragem, considerando-se um DAP ≥ 25 cm, uma intensidade amostral de 4%, um erro máximo de 10% e parcelas de 0,09, 0,16 e 0,25 ha, sendo os dois últimos tamanhos utilizados apenas para analisar o efeito destas sobre os estimadores da AAC. Os processos foram avaliados pela exatidão, precisão (E%) e intervalo de confiança (IC), enquanto as médias de árvores ha-1 dos processos foram comparadas com a do inventário 100%, pelo teste Z. O processo AAC não demonstrou diferença significativa entre a sua média de árvores ha-1 e a do inventário 100%, e também foi o mais exato e o único cujo IC abrangeu a média verdadeira. No entanto, apresentou uma intensidade amostral final 3,6 vezes maior que as da ACS e AS, além de E% acima de 10%, o que o torna inaceitável, legalmente, e inviável economicamente. Os demais processos apresentaram densidades significativamente maiores que a do inventário 100%, entretanto com intensidades amostrais menores que a da AAC e E% inferiores a 10%, tornando-os viáveis legalmente. O uso de parcelas maiores na AAC implica em clusters maiores e maior tendência em subestimar o número de árvores, resultando em maiores erros amostrais e menores exatidões.CERNECERNE2018-10-16info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://cerne.ufla.br/site/index.php/CERNE/article/view/1828CERNE; Vol. 24 No. 3 (2018); 169-179CERNE; v. 24 n. 3 (2018); 169-1792317-63420104-7760reponame:Cerne (Online)instname:Universidade Federal de Lavras (UFLA)instacron:UFLAenghttps://cerne.ufla.br/site/index.php/CERNE/article/view/1828/1079Copyright (c) 2018 CERNEinfo:eu-repo/semantics/openAccessVieira, Diego dos SantosOliveira, Marcio Leles Romarco deGama, João Ricardo VasconcellosOliveira, Bruno LafetáRego, Anna Karyne CostaBezerra, Talita Godinho2019-06-05T14:06:30Zoai:cerne.ufla.br:article/1828Revistahttps://cerne.ufla.br/site/index.php/CERNEPUBhttps://cerne.ufla.br/site/index.php/CERNE/oaicerne@dcf.ufla.br||cerne@dcf.ufla.br2317-63420104-7760opendoar:2024-05-21T19:54:36.545432Cerne (Online) - Universidade Federal de Lavras (UFLA)true |
dc.title.none.fl_str_mv |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA PROCESSOS DE AMOSTRAGEM PARA Carapa guianensis Aubl. na Amazônia: PROCESSOS DE AMOSTRAGEM PARA ANDIROBA |
title |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
spellingShingle |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA Vieira, Diego dos Santos Adaptive cluster sampling Simple random sampling Systematic samplingn SAMPLING PROCESSES; ECOLOGY Adaptive cluster sampling Simple random sampling Systematic samplingn PROCESSOS DE AMOSTRAGEM ECOLOGIA |
title_short |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
title_full |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
title_fullStr |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
title_full_unstemmed |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
title_sort |
SAMPLING PROCESSES FOR Carapa guianensis Aubl. IN THE AMAZON: SAMPLING PROCESSES FOR ANDIROBA |
author |
Vieira, Diego dos Santos |
author_facet |
Vieira, Diego dos Santos Oliveira, Marcio Leles Romarco de Gama, João Ricardo Vasconcellos Oliveira, Bruno Lafetá Rego, Anna Karyne Costa Bezerra, Talita Godinho |
author_role |
author |
author2 |
Oliveira, Marcio Leles Romarco de Gama, João Ricardo Vasconcellos Oliveira, Bruno Lafetá Rego, Anna Karyne Costa Bezerra, Talita Godinho |
author2_role |
author author author author author |
dc.contributor.author.fl_str_mv |
Vieira, Diego dos Santos Oliveira, Marcio Leles Romarco de Gama, João Ricardo Vasconcellos Oliveira, Bruno Lafetá Rego, Anna Karyne Costa Bezerra, Talita Godinho |
dc.subject.por.fl_str_mv |
Adaptive cluster sampling Simple random sampling Systematic samplingn SAMPLING PROCESSES; ECOLOGY Adaptive cluster sampling Simple random sampling Systematic samplingn PROCESSOS DE AMOSTRAGEM ECOLOGIA |
topic |
Adaptive cluster sampling Simple random sampling Systematic samplingn SAMPLING PROCESSES; ECOLOGY Adaptive cluster sampling Simple random sampling Systematic samplingn PROCESSOS DE AMOSTRAGEM ECOLOGIA |
description |
The objective of this study was to analyze the adaptive cluster sampling (ACS), simple random sampling (SRS) and systematic sampling (SS) processes to obtain the number of ha-1 trees of Carapa guianensis Aubl. in the Amazon. The data were obtained through 100% inventory and sampling simulations, considering a DBH ≥ 25 cm, a sampling intensity of 4%, a maximum error of 10% and plots of 0.09, 0.16 and 0.25 ha. The last two sizes were only used to analyze their effect on the ACS estimators. The processes were evaluated for accuracy, precision (E%) and confidence interval (CI), while the mean ha-1 of the processes were compared with that of the 100% inventory by the Z test. The ACS process showed no significant difference between its average ha-1 trees and the 100% inventory, and it was also the most accurate and the only one whose CI was true. However, it presented a final sample intensity 3.6 times greater than the simple and systematic random samplings, in addition to E% above 10%, which makes it unacceptable, legally, and economically unfeasible. The other processes had densities significantly higher than the 100% inventory, with sample intensities lower than ACS and E% lower than 10%, making them legally viable. The use of larger plots in the ACS implies larger clusters and a greater tendency to underestimate the number of trees, resulting in larger sample errors and less accuracy. |
publishDate |
2018 |
dc.date.none.fl_str_mv |
2018-10-16 |
dc.type.driver.fl_str_mv |
info:eu-repo/semantics/article info:eu-repo/semantics/publishedVersion |
format |
article |
status_str |
publishedVersion |
dc.identifier.uri.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/1828 |
url |
https://cerne.ufla.br/site/index.php/CERNE/article/view/1828 |
dc.language.iso.fl_str_mv |
eng |
language |
eng |
dc.relation.none.fl_str_mv |
https://cerne.ufla.br/site/index.php/CERNE/article/view/1828/1079 |
dc.rights.driver.fl_str_mv |
Copyright (c) 2018 CERNE info:eu-repo/semantics/openAccess |
rights_invalid_str_mv |
Copyright (c) 2018 CERNE |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
CERNE CERNE |
publisher.none.fl_str_mv |
CERNE CERNE |
dc.source.none.fl_str_mv |
CERNE; Vol. 24 No. 3 (2018); 169-179 CERNE; v. 24 n. 3 (2018); 169-179 2317-6342 0104-7760 reponame:Cerne (Online) instname:Universidade Federal de Lavras (UFLA) instacron:UFLA |
instname_str |
Universidade Federal de Lavras (UFLA) |
instacron_str |
UFLA |
institution |
UFLA |
reponame_str |
Cerne (Online) |
collection |
Cerne (Online) |
repository.name.fl_str_mv |
Cerne (Online) - Universidade Federal de Lavras (UFLA) |
repository.mail.fl_str_mv |
cerne@dcf.ufla.br||cerne@dcf.ufla.br |
_version_ |
1799874943654035456 |