Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia
Autor(a) principal: | |
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Data de Publicação: | 2007 |
Outros Autores: | , |
Tipo de documento: | Artigo |
Idioma: | por |
Título da fonte: | Repositório Institucional do INPA |
Texto Completo: | https://repositorio.inpa.gov.br/handle/1/14945 |
Resumo: | The large area covered by the Amazonian domain and the limited financial support for biodiversity studies demand efficient research programs. Aiming to evaluate the consequences of reduced sampling effort on the retention of ecological information, we tested how differences in plot width affect the perceived relationship between environmental variation and the composition of the pteridophyte community in Central Amazonia. Measures of slope, canopy openness and soil clay content were taken in 37 terra-firme forest plots. All pteridophyte individuals were identified and mapped according to three sample strips. We tested the effects of environmental variables on pteridophyte composition of 250 × 2.5 meters-plots and on sub-samples of reduced width. The reduction of plot width from 2.5 to 1 m (60% reduction in sampling effort) corresponded to a reduction of 24% of the project’s costs concerning field work expenses. This would reduce the number of sampled species from 52 to 44. The reduction of 20% plot width (from 2.5 to 2 m) would cause a reduction of two (4%) sampled species and a reduction of 8% of the costs. For all tested plot widths, community composition was associated with soil clay content and was not associated with the terrain slope. The effect of canopy openness on pteridophyte species composition was not consistent among sample sizes. These may be related to the relatively lower importance of light availability in determining community structure at the studied spatial scale. We concluded that the smallest plots were informative enough to detect the main gradients of composition and their association to environmental factors. This would allow a reduction in total costs, or the allocation of available budget to more plots, which could increase the power of the statistical analyses, reduce the confidence intervals and increase probability of detecting more species. © 2007, Universidade Estadual de Campinas UNICAMP. All rights reserved. |
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Zuquim, GabrielaCosta, Flávia Regina CapellottoPrado, J.2020-05-07T13:57:40Z2020-05-07T13:57:40Z2007https://repositorio.inpa.gov.br/handle/1/1494510.1590/S1676-06032007000300023The large area covered by the Amazonian domain and the limited financial support for biodiversity studies demand efficient research programs. Aiming to evaluate the consequences of reduced sampling effort on the retention of ecological information, we tested how differences in plot width affect the perceived relationship between environmental variation and the composition of the pteridophyte community in Central Amazonia. Measures of slope, canopy openness and soil clay content were taken in 37 terra-firme forest plots. All pteridophyte individuals were identified and mapped according to three sample strips. We tested the effects of environmental variables on pteridophyte composition of 250 × 2.5 meters-plots and on sub-samples of reduced width. The reduction of plot width from 2.5 to 1 m (60% reduction in sampling effort) corresponded to a reduction of 24% of the project’s costs concerning field work expenses. This would reduce the number of sampled species from 52 to 44. The reduction of 20% plot width (from 2.5 to 2 m) would cause a reduction of two (4%) sampled species and a reduction of 8% of the costs. For all tested plot widths, community composition was associated with soil clay content and was not associated with the terrain slope. The effect of canopy openness on pteridophyte species composition was not consistent among sample sizes. These may be related to the relatively lower importance of light availability in determining community structure at the studied spatial scale. We concluded that the smallest plots were informative enough to detect the main gradients of composition and their association to environmental factors. This would allow a reduction in total costs, or the allocation of available budget to more plots, which could increase the power of the statistical analyses, reduce the confidence intervals and increase probability of detecting more species. © 2007, Universidade Estadual de Campinas UNICAMP. All rights reserved.Volume 7, Número 3Attribution-NonCommercial-NoDerivs 3.0 Brazilhttp://creativecommons.org/licenses/by-nc-nd/3.0/br/info:eu-repo/semantics/openAccessSample effort reduction vs. information retention in inventories of pteridophytes in Central AmazoniaRedução de esforço amostral vs. Retenção de informação em inventários de pteridófitas na Amazônia Centralinfo:eu-repo/semantics/publishedVersioninfo:eu-repo/semantics/articleBiota Neotropicaporreponame:Repositório Institucional do INPAinstname:Instituto Nacional de Pesquisas da Amazônia (INPA)instacron:INPAORIGINALartigo-inpa.pdfapplication/pdf2453613https://repositorio.inpa.gov.br/bitstream/1/14945/1/artigo-inpa.pdfb440380c5adc3058f7d405ec9c398026MD51CC-LICENSElicense_rdfapplication/octet-stream914https://repositorio.inpa.gov.br/bitstream/1/14945/2/license_rdf4d2950bda3d176f570a9f8b328dfbbefMD521/149452020-07-14 10:29:35.331oai:repositorio:1/14945Repositório de PublicaçõesPUBhttps://repositorio.inpa.gov.br/oai/requestopendoar:2020-07-14T14:29:35Repositório Institucional do INPA - Instituto Nacional de Pesquisas da Amazônia (INPA)false |
dc.title.pt_BR.fl_str_mv |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
dc.title.alternative.pt_BR.fl_str_mv |
Redução de esforço amostral vs. Retenção de informação em inventários de pteridófitas na Amazônia Central |
title |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
spellingShingle |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia Zuquim, Gabriela |
title_short |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
title_full |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
title_fullStr |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
title_full_unstemmed |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
title_sort |
Sample effort reduction vs. information retention in inventories of pteridophytes in Central Amazonia |
author |
Zuquim, Gabriela |
author_facet |
Zuquim, Gabriela Costa, Flávia Regina Capellotto Prado, J. |
author_role |
author |
author2 |
Costa, Flávia Regina Capellotto Prado, J. |
author2_role |
author author |
dc.contributor.author.fl_str_mv |
Zuquim, Gabriela Costa, Flávia Regina Capellotto Prado, J. |
description |
The large area covered by the Amazonian domain and the limited financial support for biodiversity studies demand efficient research programs. Aiming to evaluate the consequences of reduced sampling effort on the retention of ecological information, we tested how differences in plot width affect the perceived relationship between environmental variation and the composition of the pteridophyte community in Central Amazonia. Measures of slope, canopy openness and soil clay content were taken in 37 terra-firme forest plots. All pteridophyte individuals were identified and mapped according to three sample strips. We tested the effects of environmental variables on pteridophyte composition of 250 × 2.5 meters-plots and on sub-samples of reduced width. The reduction of plot width from 2.5 to 1 m (60% reduction in sampling effort) corresponded to a reduction of 24% of the project’s costs concerning field work expenses. This would reduce the number of sampled species from 52 to 44. The reduction of 20% plot width (from 2.5 to 2 m) would cause a reduction of two (4%) sampled species and a reduction of 8% of the costs. For all tested plot widths, community composition was associated with soil clay content and was not associated with the terrain slope. The effect of canopy openness on pteridophyte species composition was not consistent among sample sizes. These may be related to the relatively lower importance of light availability in determining community structure at the studied spatial scale. We concluded that the smallest plots were informative enough to detect the main gradients of composition and their association to environmental factors. This would allow a reduction in total costs, or the allocation of available budget to more plots, which could increase the power of the statistical analyses, reduce the confidence intervals and increase probability of detecting more species. © 2007, Universidade Estadual de Campinas UNICAMP. All rights reserved. |
publishDate |
2007 |
dc.date.issued.fl_str_mv |
2007 |
dc.date.accessioned.fl_str_mv |
2020-05-07T13:57:40Z |
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2020-05-07T13:57:40Z |
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https://repositorio.inpa.gov.br/handle/1/14945 |
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10.1590/S1676-06032007000300023 |
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https://repositorio.inpa.gov.br/handle/1/14945 |
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10.1590/S1676-06032007000300023 |
dc.language.iso.fl_str_mv |
por |
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Volume 7, Número 3 |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ info:eu-repo/semantics/openAccess |
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Attribution-NonCommercial-NoDerivs 3.0 Brazil http://creativecommons.org/licenses/by-nc-nd/3.0/br/ |
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openAccess |
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Biota Neotropica |
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Biota Neotropica |
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