Data/hora: 16/06/2024 06:16:49

Provedor de dados: | 52
País: | Brazil
Título: | Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil
Autores: | Moura,Ariadne do Nascimento; Dantas,Ênio Wocyli; Bittencourt-Oliveira,Maria do Carmo.
Data: | 2007-07-01
Ano: | 2007
Palavras-chave: | Structure; Phytoplankton; Water supply system; Brazil.
Resumo: | The aim of this work was to study the phytoplankton community composition at limnetic environment in Pernambuco, Brazil. Samplings were carried out from April/2001 to March/2002. Samples to analyses the biotic variables were taken using a recipient with a large overture, at the subsurface and with a Van Dorn bottle at the bottom. The rainfall data were recorded and the water transparency was used to calculate the light attenuation coefficient, photic zone and the determination of trophic state index. The concentrations of total phosphorus and total nitrogen were determined in a typical dry and rainy month. Equitability, also the, similarity and diversity indexes and the densities and correlation of total densities among depths were calculated. Forty-five taxa were identified in Chlorophyta (21spp), Cyanophyta (17spp) and Bacillariophyta (7spp), while flagellates were quantified in groups without identification. Cyanophyta presented highest diversity at both the depths and Planktothrix agardhii was the highest density species. Significant differences were not observed between subsurface and bottom densities. Results showed that the reservoir was eutrophicated and presented high densities of Cyanophyta.
Tipo: | Info:eu-repo/semantics/article
Idioma: | Inglês
Identificador: | http://www.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400010
Editor: | Instituto de Tecnologia do Paraná - Tecpar
Relação: | 10.1590/S1516-89132007000400010
Formato: | text/html
Fonte: | Brazilian Archives of Biology and Technology  v.50 n.4 2007
Fonte: | info:eu-repo/semantics/openAccess