Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil
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.
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Instituto de Tecnologia do Paraná - Tecpar
2007
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oai:scielo:S1516-891320070004000102007-10-08Structure of the phytoplankton in a water supply system in the State of Pernambuco - BrazilMoura,Ariadne do NascimentoDantas,Ênio WocyliBittencourt-Oliveira,Maria do Carmo Structure phytoplankton water supply system Brazil 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.info:eu-repo/semantics/openAccessInstituto de Tecnologia do Paraná - TecparBrazilian Archives of Biology and Technology v.50 n.4 20072007-07-01info:eu-repo/semantics/articletext/htmlhttp://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400010en10.1590/S1516-89132007000400010 |
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Moura,Ariadne do Nascimento Dantas,Ênio Wocyli Bittencourt-Oliveira,Maria do Carmo |
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Moura,Ariadne do Nascimento Dantas,Ênio Wocyli Bittencourt-Oliveira,Maria do Carmo Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
author_facet |
Moura,Ariadne do Nascimento Dantas,Ênio Wocyli Bittencourt-Oliveira,Maria do Carmo |
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Moura,Ariadne do Nascimento |
title |
Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
title_short |
Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
title_full |
Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
title_fullStr |
Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
title_full_unstemmed |
Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil |
title_sort |
structure of the phytoplankton in a water supply system in the state of pernambuco - brazil |
description |
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. |
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Instituto de Tecnologia do Paraná - Tecpar |
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2007 |
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http://old.scielo.br/scielo.php?script=sci_arttext&pid=S1516-89132007000400010 |
work_keys_str_mv |
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1756423758423261184 |