ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS
Autor(a) principal: | |
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Data de Publicação: | 2012 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Ciência Florestal (Online) |
Texto Completo: | https://periodicos.ufsm.br/cienciaflorestal/article/view/5083 |
Resumo: | http://dx.doi.org/10.5902/198050985083The definition of the sample size is a major problem in studies of phytosociology. The species accumulation curve is used to define the sampling sufficiency, but this method presents some limitations such as the absence of a stabilization point that can be objectively determined and the arbitrariness of the order of sampling units in the curve. A solution to this problem is the use of randomization procedures, e.g. permutation, for obtaining a mean species accumulation curve and empiric confidence intervals. However, the randomization process emphasizes the asymptotical character of the curve. Moreover, the inexistence of an inflection point in the curve makes it impossible to define objectively the point of optimum sample size. |
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ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTSAusência de estabilização da curva de acumulação de espécies em florestas tropicaisphytosociologysampling sufficiencyspecies-accumulation curvecurva de acumulação de espéciesfitossociologiasuficiência amostralhttp://dx.doi.org/10.5902/198050985083The definition of the sample size is a major problem in studies of phytosociology. The species accumulation curve is used to define the sampling sufficiency, but this method presents some limitations such as the absence of a stabilization point that can be objectively determined and the arbitrariness of the order of sampling units in the curve. A solution to this problem is the use of randomization procedures, e.g. permutation, for obtaining a mean species accumulation curve and empiric confidence intervals. However, the randomization process emphasizes the asymptotical character of the curve. Moreover, the inexistence of an inflection point in the curve makes it impossible to define objectively the point of optimum sample size.http://dx.doi.org/10.5902/198050985083A definição do tamanho da amostra é um dos principais problemas em levantamentos fitossociológicos. A curva de acumulação de espécies é comumente utilizada para definir a suficiência amostral, mas este método apresenta algumas limitações, como a ausência de um ponto de estabilização que possa ser determinado objetivamente e a arbitrariedade da ordem de entrada das unidades amostrais na construção da curva. Uma solução para esse problema é o uso de procedimentos de aleatorização, como a permutação, para obter curvas médias de acumulação de espécies e seus intervalos de confiança empíricos. Entretanto, esse procedimento enfatiza o caráter assintótico da curva, que não apresenta ponto de inflexão, tornando-se impossível a determinação de um ponto objetivo para avaliar o tamanho ótimo da amostra.Universidade Federal de Santa Maria2012-03-30info:eu-repo/semantics/articleinfo:eu-repo/semantics/publishedVersionapplication/pdfhttps://periodicos.ufsm.br/cienciaflorestal/article/view/508310.5902/198050985083Ciência Florestal; Vol. 22 No. 1 (2012); 101-111Ciência Florestal; v. 22 n. 1 (2012); 101-1111980-50980103-9954reponame:Ciência Florestal (Online)instname:Universidade Federal de Santa Maria (UFSM)instacron:UFSMporhttps://periodicos.ufsm.br/cienciaflorestal/article/view/5083/3076Schilling, Ana CristinaBatista, João Luis FerreiraCouto, Hilton Zarate doinfo:eu-repo/semantics/openAccess2014-08-28T22:49:11Zoai:ojs.pkp.sfu.ca:article/5083Revistahttp://www.ufsm.br/cienciaflorestal/ONGhttps://old.scielo.br/oai/scielo-oai.php||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br1980-50980103-9954opendoar:2014-08-28T22:49:11Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM)false |
dc.title.none.fl_str_mv |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS Ausência de estabilização da curva de acumulação de espécies em florestas tropicais |
title |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
spellingShingle |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS Schilling, Ana Cristina phytosociology sampling sufficiency species-accumulation curve curva de acumulação de espécies fitossociologia suficiência amostral |
title_short |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
title_full |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
title_fullStr |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
title_full_unstemmed |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
title_sort |
ABSENCE OF STABILIZATION POINT OF THE SPECIES ACCUMULATION CURVE IN TROPICAL FORESTS |
author |
Schilling, Ana Cristina |
author_facet |
Schilling, Ana Cristina Batista, João Luis Ferreira Couto, Hilton Zarate do |
author_role |
author |
author2 |
Batista, João Luis Ferreira Couto, Hilton Zarate do |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Schilling, Ana Cristina Batista, João Luis Ferreira Couto, Hilton Zarate do |
dc.subject.por.fl_str_mv |
phytosociology sampling sufficiency species-accumulation curve curva de acumulação de espécies fitossociologia suficiência amostral |
topic |
phytosociology sampling sufficiency species-accumulation curve curva de acumulação de espécies fitossociologia suficiência amostral |
description |
http://dx.doi.org/10.5902/198050985083The definition of the sample size is a major problem in studies of phytosociology. The species accumulation curve is used to define the sampling sufficiency, but this method presents some limitations such as the absence of a stabilization point that can be objectively determined and the arbitrariness of the order of sampling units in the curve. A solution to this problem is the use of randomization procedures, e.g. permutation, for obtaining a mean species accumulation curve and empiric confidence intervals. However, the randomization process emphasizes the asymptotical character of the curve. Moreover, the inexistence of an inflection point in the curve makes it impossible to define objectively the point of optimum sample size. |
publishDate |
2012 |
dc.date.none.fl_str_mv |
2012-03-30 |
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://periodicos.ufsm.br/cienciaflorestal/article/view/5083 10.5902/198050985083 |
url |
https://periodicos.ufsm.br/cienciaflorestal/article/view/5083 |
identifier_str_mv |
10.5902/198050985083 |
dc.language.iso.fl_str_mv |
por |
language |
por |
dc.relation.none.fl_str_mv |
https://periodicos.ufsm.br/cienciaflorestal/article/view/5083/3076 |
dc.rights.driver.fl_str_mv |
info:eu-repo/semantics/openAccess |
eu_rights_str_mv |
openAccess |
dc.format.none.fl_str_mv |
application/pdf |
dc.publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
publisher.none.fl_str_mv |
Universidade Federal de Santa Maria |
dc.source.none.fl_str_mv |
Ciência Florestal; Vol. 22 No. 1 (2012); 101-111 Ciência Florestal; v. 22 n. 1 (2012); 101-111 1980-5098 0103-9954 reponame:Ciência Florestal (Online) instname:Universidade Federal de Santa Maria (UFSM) instacron:UFSM |
instname_str |
Universidade Federal de Santa Maria (UFSM) |
instacron_str |
UFSM |
institution |
UFSM |
reponame_str |
Ciência Florestal (Online) |
collection |
Ciência Florestal (Online) |
repository.name.fl_str_mv |
Ciência Florestal (Online) - Universidade Federal de Santa Maria (UFSM) |
repository.mail.fl_str_mv |
||cienciaflorestal@ufsm.br|| cienciaflorestal@gmail.com|| cf@smail.ufsm.br |
_version_ |
1799944128033718272 |