Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil

Moura, Ariadne do Nascimento; Dantas, Ênio Wocyli; Bittencourt‐Oliveira, Maria do Carmo

doi:10.1590/s1516-89132007000400010

Cited by 18 publications

(26 citation statements)

References 24 publications

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“…The phosphorous showed the highest concentration in the dry season, a result also found by in studies in eutrophic reservoirs. Nevertheless, higher concentrations of this macronutrient and nitrogen forms were found in the rainy season, confirming Moura et al (2007b), Teixeira de Oliveira et al (2011), Dantas et al (2012) and Bezerra et al (2014). The profile for nitrogen was confirmed in this study and may be due to the input of sediments and nutrients from the reservoir margins.…”

Section: Discussionsupporting

confidence: 89%

“…High concentrations of phosphorus and nitrogen forms were verified in all samples, corroborating studies in eutrophic ecosystems undertaken by Moura et al (2007a) on these macronutrient concentrations. The phosphorous showed the highest concentration in the dry season, a result also found by in studies in eutrophic reservoirs.…”

Section: Discussionsupporting

confidence: 85%

“…The profile for nitrogen was confirmed in this study and may be due to the input of sediments and nutrients from the reservoir margins. Finally, studies performed by Moura et al (2007a) and DellamanoOliveira et al (2008) detected smaller concentrations of both nutrients during the rainy season, possibly as a result of the dilution effect of rainfall. The characterization of the studied areas shows that the upstream stretch of Carpina and Jucazinho reservoirs is subjected to intense human activities, considering the agglomeration of several municipalities along the banks of the Capibaribe River.…”

Section: Discussionmentioning

confidence: 84%

“…Alkaline pH values were registered throughout the study in both reservoirs, as well as in studies carried out in eutrophic reservoirs in northeastern Brazil (MOURA et al, 2007b. The aquatic communities can interfere with pH and algae can raise the pH through photosynthesis.…”

Section: Discussionmentioning

confidence: 85%

“…Moura et al (2007b), and Lira et al (2011), studying Brazilian reservoirs, observed that these environments remained eutrophic or hypereutrophic throughout the year, mainly in the drier months.…”

Section: Discussionmentioning

confidence: 97%

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<b>Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil

Oliveira

Silva

Costa

et al. 2015

Acta Sci. Biol. Sci.

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ABSTRACT. This study investigated the effect of seasonality on the Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil. Monthly samplings were conducted in the sub-surface of reservoirs. The following abiotic variables were analyzed: apparent color, turbidity, conductivity, alkalinity, calcium, magnesium, sodium, potassium, sulfate, total phosphorous, ammonia, nitrate, nitrite, chlorides, total hardness and chlorophyll-a, according to APHA (2012). Cyanobacteria density was quantified through biomass. Data were analyzed using one-way ANOVA and Redundancy Analysis (RDA). Higher mean values of Cyanobacteria biomass occurred in the dry (9.9mm ) season in Jucazinho and Carpina reservoirs, respectively, especially Planktothrix agardhii, Cylindrospermopsis raciborskii and Geiterinema amphibium, which occurred in 100% of the samples. RDA analysis revealed that the variables nitrite, ammonia, conductivity, calcium, sulfate, chlorides and alkalinity influenced most the Cyanobacteria community in both reservoirs. High trophic state index was observed throughout the year. Seasonality affected both biotic and abiotic variables.Keywords: abiotic parameters, phytoplankton, seasonality.Comunidade de cianobactérias em dois reservatórios eutróficos e tropicais no nordeste do Brasil RESUMO. Este estudo investigou o efeito da sazonalidade sobre a comunidade de cianobactérias em dois reservatórios eutróficos tropicais no nordeste do Brasil. Mensalmente, amostras foram coletadas na subsuperfície dos reservatórios. Foram analisados os seguintes fatores abióticos: cor aparente, turbidez, condutividade, alcalinidade, cálcio, magnésio, sódio, potássio, sulfato, fósforo total, amônia, nitrato, nitrito, cloretos, dureza total e clorofila-a, de acordo com APHA (2012). A densidade de cianobactérias foi quantificada por meio de sua biomassa. Os dados foram analisados usando Anova (one-way) e Análise de Redundância (RDA). Maiores valores médios de biomassa de cianobactérias ocorreram na estação seca (9,9 mm ) nos reservatórios de Jucazinho e Carpina, respectivamente, especialmente Planktothrix agardhii, Cylindrospermopsis raciborskii e Geitlerinema amphibium que ocorreram em 100% das amostras. A análise de RDA revelou que os parâmetros nitrito, amônia, condutividade, cálcio, sulfato, cloretos e alcalinidade foram mais influentes na comunidade de Cyanobacteria em ambos os reservatórios. Elevado índice de estado trófico foi detectado durante todo o ano. A sazonalidade exerceu influência tanto nas variáveis bióticas como abióticas.Palavras-chave: parâmetros abióticos, fitoplâncton, sazonalidade.

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Section: Discussionsupporting

confidence: 89%

Section: Discussionsupporting

confidence: 85%

Section: Discussionmentioning

confidence: 84%

Section: Discussionmentioning

confidence: 85%

Section: Discussionmentioning

confidence: 97%

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<b>Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil

Oliveira

Silva

Costa

et al. 2015

Acta Sci. Biol. Sci.

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Dynamics of phytoplankton associations in three reservoirs in northeastern Brazil assessed using Reynolds’ theory

Dantas

Bittencourt‐Oliveira

2012

Limnologica

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a b s t r a c tThe aim of the present study was to evaluate the influence of seasonality on the behavior of phytoplankton associations in eutrophic reservoirs with different depths in northeastern Brazil. Five collections were carried out at each of the reservoirs at two depths (0.1 m and near the sediment) at three-month intervals in each season (dry and rainy). The phytoplankton samples were preserved in Lugol's solution and quantified under an inverted microscope for the determination of density values, which were subsequently converted to biomass values based on cellular biovolume and classified in phytoplankton associations. The following abiotic variables were analyzed: water temperature, dissolved oxygen, pH, turbidity, water transparency, total phosphorus, total dissolved phosphorus, orthophosphate and total nitrogen. The data were investigated using canonical correspondence analysis. The influence of seasonality on the dynamics of the phytoplankton community was lesser in the deeper reservoirs. Depth affected the behavior of the algal associations. Variation in light availability was a determinant of changes in the phytoplankton structure. Urosolenia and Anabaena associations were more abundant in shallow ecosystems with a larger eutrophic zone, whereas the Microcystis association was more related to deep ecosystems with adequate availability of nutrients. The distribution of Cyclotella, Geitlerinema, Planktothrix, Pseudanabaena and Cylindrospermopsis associations was different from that seen in subtropical regions and the substitution of these associations was related to a reduction in the eutrophic zone rather than the mixture zone.Published by Elsevier GmbH.

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Environmental heterogeneity of a tropical river-to-sea continuum and its relationship with structure and phytoplankton dynamics – Lençóis Maranhenses National Park

Cruz

Cutrim

Santos

et al. 2023

Marine Environmental Research

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Structure of the phytoplankton in a water supply system in the State of Pernambuco - Brazil

Abstract: The aim of this work was to study the phytoplankton community composition at limnetic environment in

Cited by 18 publications

References 24 publications

<b>Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil

<b>Cyanobacteria community in two tropical eutrophic reservoirs in northeastern Brazil

Dynamics of phytoplankton associations in three reservoirs in northeastern Brazil assessed using Reynolds’ theory

Environmental heterogeneity of a tropical river-to-sea continuum and its relationship with structure and phytoplankton dynamics – Lençóis Maranhenses National Park

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