| Registro completo |
| Provedor de dados: |
BJB
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| País: |
Brazil
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| Título: |
A new study method of microhabitat structure of small mammals
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| Autores: |
CERQUEIRA,R.
FREITAS,S. R.
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| Data: |
1999-05-01
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| Ano: |
1999
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| Palavras-chave: |
Discriminant analysis
Methods
Niche
Neotropics
Small mammals
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| Resumo: |
The variables in habitat studies are usually transformed in such a way that they become abstractions and intuition is lost. We tested a new method for the analysis of habitat using data collected in a grid laid at the "restinga de Maricá", in Rio de Janeiro State, Brazil. Thirty-seven microhabitat variables were measured at each trap station. We assume that these variables characterize the microhabitat structure at the moment when measurements were taken. The data are transformed in 3 ways: (1) the averages of the measured variables were calculated, as usual in habitat studies; (2) the data are transformed in densities per area in square meters without reduction in the number of variables; and (3) we calculated the natural logarithms of the data thus transformed. The 3 sets were analised through discriminant analysis. The logarithms of densities were the most efficient kind of transformation. This transformation resulted in a significance of p = 0.0001 with 39.72% of variance in the 1st discriminant function and of p = 0.0426 with 31.45% of variance in the 2nd function, and 84.62% of groups correctly classified. We obtained better classification results than previous similar works and we kept the intuition through the data analysis.
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| Tipo: |
Info:eu-repo/semantics/article
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| Idioma: |
Inglês
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| Identificador: |
http://www.scielo.br/scielo.php?script=sci_arttext&pid=S0034-71081999000200006
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| Editor: |
Instituto Internacional de Ecologia
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| Relação: |
10.1590/S0034-71081999000200006
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| Formato: |
text/html
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| Fonte: |
Revista Brasileira de Biologia v.59 n.2 1999
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| Direitos: |
info:eu-repo/semantics/openAccess
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