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Registro Completo |
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Biblioteca(s): |
Embrapa Florestas. |
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Data corrente: |
02/10/2008 |
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Data da última atualização: |
02/10/2008 |
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Autoria: |
SANTOS, E. M. R.; FRANKLIN, E.; MAGNUSSON, W. E. |
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Título: |
Cost-efficiency of Sub-sampling Protocols to Evaluate Oribatid-Mite Communities in an Amazonian Savanna. |
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Ano de publicação: |
2008 |
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Fonte/Imprenta: |
In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM. |
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Idioma: |
Inglês |
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Conteúdo: |
Sampling oribatid mites in large areas using conventional methods is expensive, time-consuming,
and this constrains their use in environmental monitoring programs. We used samples collected
in 38 plots of 3.75 ha spread over 30,000 ha in an Amazonian savanna to evaluate the reduction
in costs and person-hours in sampling and sorting and to elaborate cost-effective protocols. Ten
samples per plot were collected and extracted using a Berlese-Tullgren apparatus. In the
laboratory, samples were reduced to 50, 25, 12.5 and 6.25 percent of the initial content. Fieldeffort
reduction was estimated by reducing the number of subsamples per plot. Dissimilarity
matrices were generated using Bray-Curtis, Sørensen and Chao-Sørensen indices. Correlations
between each reduced-effort dissimilarity matrix and 100 or 50 percent sorting were used as an
index of how much information was retained in reduced-effort sampling, and could still be used
in multivariate analyses. The effects of most predictor variables on mite composition were
detected in data based on every level of sample reduction. The intensive sampling was insufficient
to reveal the full oribatid-mite fauna in the savanna; as more plots were sampled, more species
were recorded. Our data indicate sub-sampling protocols for biodiversity assessment of oribatid
mites in savanna that increase field and labor efficiency, and optimize both taxonomic and
ecological aspects of the investigation.
Financial support: PPG7 6400-0021-00, PPI-INPA 1-3010, CNPq. MenosSampling oribatid mites in large areas using conventional methods is expensive, time-consuming,
and this constrains their use in environmental monitoring programs. We used samples collected
in 38 plots of 3.75 ha spread over 30,000 ha in an Amazonian savanna to evaluate the reduction
in costs and person-hours in sampling and sorting and to elaborate cost-effective protocols. Ten
samples per plot were collected and extracted using a Berlese-Tullgren apparatus. In the
laboratory, samples were reduced to 50, 25, 12.5 and 6.25 percent of the initial content. Fieldeffort
reduction was estimated by reducing the number of subsamples per plot. Dissimilarity
matrices were generated using Bray-Curtis, Sørensen and Chao-Sørensen indices. Correlations
between each reduced-effort dissimilarity matrix and 100 or 50 percent sorting were used as an
index of how much information was retained in reduced-effort sampling, and could still be used
in multivariate analyses. The effects of most predictor variables on mite composition were
detected in data based on every level of sample reduction. The intensive sampling was insufficient
to reveal the full oribatid-mite fauna in the savanna; as more plots were sampled, more species
were recorded. Our data indicate sub-sampling protocols for biodiversity assessment of oribatid
mites in savanna that increase field and labor efficiency, and optimize both taxonomic and
ecological aspects of the investigation.
Financial support: PPG7 6400-0021-00, PPI-INP... Mostrar Tudo |
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Categoria do assunto: |
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Marc: |
LEADER 02225naa a2200145 a 4500
001 1315002
005 2008-10-02
008 2008 bl uuuu u00u1 u #d
100 1 $aSANTOS, E. M. R.
245 $aCost-efficiency of Sub-sampling Protocols to Evaluate Oribatid-Mite Communities in an Amazonian Savanna.
260 $c2008
520 $aSampling oribatid mites in large areas using conventional methods is expensive, time-consuming, and this constrains their use in environmental monitoring programs. We used samples collected in 38 plots of 3.75 ha spread over 30,000 ha in an Amazonian savanna to evaluate the reduction in costs and person-hours in sampling and sorting and to elaborate cost-effective protocols. Ten samples per plot were collected and extracted using a Berlese-Tullgren apparatus. In the laboratory, samples were reduced to 50, 25, 12.5 and 6.25 percent of the initial content. Fieldeffort reduction was estimated by reducing the number of subsamples per plot. Dissimilarity matrices were generated using Bray-Curtis, Sørensen and Chao-Sørensen indices. Correlations between each reduced-effort dissimilarity matrix and 100 or 50 percent sorting were used as an index of how much information was retained in reduced-effort sampling, and could still be used in multivariate analyses. The effects of most predictor variables on mite composition were detected in data based on every level of sample reduction. The intensive sampling was insufficient to reveal the full oribatid-mite fauna in the savanna; as more plots were sampled, more species were recorded. Our data indicate sub-sampling protocols for biodiversity assessment of oribatid mites in savanna that increase field and labor efficiency, and optimize both taxonomic and ecological aspects of the investigation. Financial support: PPG7 6400-0021-00, PPI-INPA 1-3010, CNPq.
700 1 $aFRANKLIN, E.
700 1 $aMAGNUSSON, W. E.
773 $tIn: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.
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Registro original: |
Embrapa Florestas (CNPF) |
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| Registros recuperados : 121 | |
| 12. |  | SANTOS, E. M. R.; FRANKLIN, E.; LUIZÃO, F. J. Litter manipulation and associated invertebrate fauna in secondary forest, central Amazonia, Brazil. In: INTERNATIONAL COLLOQUIUM ON SOIL ZOOLOGY, 15; INTERNATIONAL COLLOQUIUM ON APTERYGOTA, 12., 2008, Curitiba. Biodiversity, conservation and sustainabele management of soil animal: abstracts. Colombo: Embrapa Florestas. Editors: George Gardner Brown; Klaus Dieter Sautter; Renato Marques; Amarildo Pasini. 1 CD-ROM.| Biblioteca(s): Embrapa Florestas. |
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| 17. | | CUENCA, M. A. G.; GABRIEL, T. dos S.; PRATA, D. A. T.; SANTOS, E. M. Análise econométrica do comportamento histórico dos preços pagos aos cocoicultores sergipanos e sua participação percentual na variação do valor bruto da produção de coco. CONGRESSO BRASILEIRO DE FRUTICULTURA, 20.; ANNUAL MEETING OF THE INTERAMERICAN SOCIETY FOR TROPICAL HOTRICULTURE, 54., 2008, Vitória. Frutas para todos: estratégias, tecnologias e visão sustentável. Vitória: Sociedade Brasileira de Fruticultura, 2008. Custos, comercialização e mercado. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| 18. | | CUENCA, M. A. G.; GABRIEL, T. dos S.; PRATA, D. A. T.; SANTOS, E. M. Análise da tendência histórica de preços recebidos pelos produtores de laranja no estado de Sergipe e sua participação percentual na variação do valor bruto da produção citrícola estadual. In: CONGRESSO BRASILEIRO DE FRUTICULTURA, 20.; ANNUAL MEETING OF THE INTERAMERICAN SOCIETY FOR TROPICAL HOTRICULTURE, 54., 2008, Vitória. Frutas para todos: estratégias, tecnologias e visão sustentável. Vitória: Sociedade Brasileira de Fruticultura, 2008. Custos, comercialização e mercado. 1 CD-ROM.| Tipo: Artigo em Anais de Congresso / Nota Técnica |
| Biblioteca(s): Embrapa Tabuleiros Costeiros. |
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| Registros recuperados : 121 | |
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