TEMPORAL VARIATION OF PHYTOPLANKTON IN A PRE-AMAZONIAN TROPICAL RIVER (PINDARE RIVER, MARANH?O, BRAZIL)

The purpose of the present study was to analyze the temporal variation of phytoplankton in th middle course of Pindaré river. Water samples were collected in six different spots along the Pindaré river middle course during the peaks of rainy and dry seasons. The phytoplankton was sampled with a plan...

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Published inCiência e natura Vol. 37; no. 2; p. 242
Main Authors Costa Rodrigues, Eduardo Henrique, Nascimento Barreto, Larissa, Ferreira Correia, Maria Marlúcia, Maria Raimunda Chagas Silva
Format Journal Article
LanguagePortuguese
Published Santa Maria Universidade Federal de Santa Maria - Centro de Ciências Naturais e Exatas 01.05.2015
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Abstract The purpose of the present study was to analyze the temporal variation of phytoplankton in th middle course of Pindaré river. Water samples were collected in six different spots along the Pindaré river middle course during the peaks of rainy and dry seasons. The phytoplankton was sampled with a plankton net of a 20 μm mesh and Von Dorn bottle. The samples were preserved in formalin 4% and lugol respectively. The Pindaré River contains high biodiversity of plankton microalgae and it is represented by a total of 98 species distributed in six classes. The Bacillariophyceae class is the best represented whereas the Cyanophyceae class is the least diversified. The phytoplankton showed higher density values during rainy season and lower values during dry season. The diversity and equitability were high throughout the study period. The composition of the phytoplankton community suffered a clear seasonal variation, during the year of study.
AbstractList The purpose of the present study was to analyze the temporal variation of phytoplankton in th middle course of Pindaré river. Water samples were collected in six different spots along the Pindaré river middle course during the peaks of rainy and dry seasons. The phytoplankton was sampled with a plankton net of a 20 μm mesh and Von Dorn bottle. The samples were preserved in formalin 4% and lugol respectively. The Pindaré River contains high biodiversity of plankton microalgae and it is represented by a total of 98 species distributed in six classes. The Bacillariophyceae class is the best represented whereas the Cyanophyceae class is the least diversified. The phytoplankton showed higher density values during rainy season and lower values during dry season. The diversity and equitability were high throughout the study period. The composition of the phytoplankton community suffered a clear seasonal variation, during the year of study.
Author Costa Rodrigues, Eduardo Henrique
Ferreira Correia, Maria Marlúcia
Maria Raimunda Chagas Silva
Nascimento Barreto, Larissa
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