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Evaluation of a new sampling method for assessing Cladocera richness (Crustacea, Branchiopoda) in macrophyte-rich wetlands

Published online by Cambridge University Press:  28 March 2014

Francisco Diogo Rocha Sousa*
Affiliation:
Núcleo de Estudos em Biodiversidade Aquática, Programa de Pós-Graduação em Biodiversidade Animal, Universidade Federal de Santa Maria, Avenida Roraima 1000, Camobi, 97105-900 Santa Maria, RS, Brazil Laboratório de Biodiversidade Aquática, Universidade Católica de Brasília, Grupo de Estudos de Ecossistemas Aquáticos, QS 7, Lote 1, bloco M, salas 204, CEP 71966-700 Taguatinga Sul, DF, Brazil
Lourdes Maria Abdu Elmoor-Loureiro
Affiliation:
Laboratório de Biodiversidade Aquática, Universidade Católica de Brasília, Grupo de Estudos de Ecossistemas Aquáticos, QS 7, Lote 1, bloco M, salas 204, CEP 71966-700 Taguatinga Sul, DF, Brazil
Luciana Mendonça-Galvão
Affiliation:
Laboratório de Biodiversidade Aquática, Universidade Católica de Brasília, Grupo de Estudos de Ecossistemas Aquáticos, QS 7, Lote 1, bloco M, salas 204, CEP 71966-700 Taguatinga Sul, DF, Brazil
José Roberto Pujol-Luz
Affiliation:
Departamento de Zoologia, Instituto de Ciência Biológicas, Universidade de Brasília, CEP 70910-900 Brasília, DF, Brazil
*
*Corresponding author: sousa_bio@yahoo.com.br
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Abstract

The wetlands found in the Brazilian Cerrado are poorly studied environments regarding ecological aspects. Assessing the diversity of aquatic invertebrates in wetlands is a challenging task, since there are no standard sampling methods that minimize the spatial effects caused by macrophytes. The aim of this study was to evaluate the efficiency of a new sampling method for assessing Cladocera richness in macrophyte-rich wetlands of Brazilian Cerrado. In six wetlands, one transect was established which corresponded to a gradient of depth or change in aquatic vegetation. Samples containing cladocerans were collected using plankton net dragged among aquatic vegetation in the dry and rainy seasons. The species accumulation curves using non-parametric estimators and the overestimation of richness were used to determine the sampling efficiency. The species accumulation curves showed different asymptotic trends regarding the season and wetland studied. Especially in the rainy season, an asymptotic trend was not observed in two of the wetlands studied, which may reflect the influence of seasonality on Cladocera assemblage. Nevertheless, the overestimation of species richness showed that the method of sampling was able to find more than 60% of the estimated species richness, regardless of season or wetland studied. These results indicate that the method employed for sampling Cladocera in the Cerrado wetlands can be considered adequate.

Type
Research Article
Copyright
© EDP Sciences, 2014

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