Associated Fauna to Eichhornia crassipes in a Constructed Wetland for Aquaculture Effluent Treatment

Author:

Sipaúba-Tavares Lúcia Helena1,Scardoelli Truzzi Bruno1,Milstein Ana2,Marcari Marques Aline1

Affiliation:

1. São Paulo State University, Aquaculture Center, Laboratory of Limnology and Plankton Production, Via de Acesso Professor Paulo Donato Castellane s/n, CEP 14884-900, Jaboticabal SP, Brazil

2. Agricultural Research Organization, Fish and Aquaculture Research Station Dor, M. P. Hof HaCarmel, Israel , IL-3082000

Abstract

Abstract Water, sediment and associated fauna were studied in a water hyacinth (Eichhornia crassipes) stand of a constructed wetland, used for aquaculture effluent treatment in SE Brazil, in February-April (summer/rainy season) and July-September (winter/dry season). The hydrological regime and decomposition processes had strong impact on the wetland water quality and on the associated fauna composition. Protozoa and Rotifera were at high densities, mainly in the dry season. Vorticella sp. was the dominant species in both seasons. Zooplankton richness, evenness and diversity were high during both seasons, with higher levels during the rainy season. Protozoa diversity and evenness were higher in the dry season when the water volume was lower. Maximum plant residence time in this wetland should be about 60 days.

Publisher

Walter de Gruyter GmbH

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