2005
DOI: 10.1590/s1519-69842005000400006
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Abstract: Hydrochemical conditions in the açu lagoon are described using spatial and temporal variations of various limnological variables (water temperature, dissolved oxygen, electric conductivity, total alkalinity, carbon dioxide, dissolved and total nutrients (n, p and Si), and chlorophyll a). collected data was used in order to understand the structure and functioning of an enclosed coastal lagoon strongly influenced by climatic conditions. Water samples were collected monthly (november 1999-december 2000) in five… Show more

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Cited by 38 publications
(23 citation statements)
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References 17 publications
(10 reference statements)
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“…Total phosphorus showed significantly higher concentrations in summer (one-way ANOVA, p < 0.01), which may be explained by higher wind influences during this season and higher sediment resuspension. Higher TP concentrations are commonly found in other coastal lagoons in Brazil (Chagas and Suzuki 2005;Esteves et al 1984;Pedrozo and Rocha 2006) and worldwide (Badylak and Phlips 2004;Gikas et al 2006;Panigrahi et al 2009). Comprida lagoon showed similar low concentrations (mean 12.3 μg/L) once more, indicating phosphorus limitation in this environment as in Peri lagoon.…”
Section: Seasonal Variation Of Water Quality Parametersmentioning
confidence: 96%
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“…Total phosphorus showed significantly higher concentrations in summer (one-way ANOVA, p < 0.01), which may be explained by higher wind influences during this season and higher sediment resuspension. Higher TP concentrations are commonly found in other coastal lagoons in Brazil (Chagas and Suzuki 2005;Esteves et al 1984;Pedrozo and Rocha 2006) and worldwide (Badylak and Phlips 2004;Gikas et al 2006;Panigrahi et al 2009). Comprida lagoon showed similar low concentrations (mean 12.3 μg/L) once more, indicating phosphorus limitation in this environment as in Peri lagoon.…”
Section: Seasonal Variation Of Water Quality Parametersmentioning
confidence: 96%
“…A possible explanation for this correlation is the entrance of organic matter in the system, which increases conductivity, while the degradation of this organic matter consumes DO. Coastal lagoons are usually directly influenced by marine waters by permanent or intermittently connections to the sea, presenting higher conductivity levels and detectable salinity (Branco et al 2000;Coelho et al 2007;Chagas and Suzuki 2005;González et al 2008;Lacerda and Gonçalves 2001;Pereira et al 2009). Impacted water bodies usually show higher conductivity levels as well (e.g., Mãe-Bá coastal lagoon- Pereira et al 2006; Marcelino coastal lake- Pedrozo and Rocha 2006).…”
Section: Seasonal Variation Of Water Quality Parametersmentioning
confidence: 99%
“…The livebearer Poecilia vivipara is widespread and abundant in the lagoons of Northeastern Rio de Janeiro State (Gomes Jr. and Monteiro 2008), although an environmental gradient caused by salinity (due to proximity with the ocean) results in considerable differences in biotic communities and physical environment, even among sites within the same lagoon (Primo et al 2002;Suzuki et al 2002;Chagas and Suzuki 2005). The lagoons started forming circa 5000 years ago, by sediment deposition from the Rio Paraíba do Sul (Southwestern region of the plains) and marine deposits from sea level fluctuations (Northeastern region) (Martin et al 1997).…”
Section: Introductionmentioning
confidence: 99%
“…In the Açu lagoon there is a strong oceanic influence due to sea water percolation through a narrow (50 m) sand bar. The annual average salinity is ∼30 ppt, and the shores around the sand bar area are devoid of macrophytes, although a seasonal growth of macroalgae might occur in deeper parts (Chagas and Suzuki 2005;Esteves et al 2005). The main predator of P. vivipara is not present in the higher salinity areas of the Açu lagoon.…”
Section: Introductionmentioning
confidence: 99%
“…Asimismo, fueron más bajas que las descritas por HerreraSilveira (2006) en las lagunas costeras de Yucatán, y las medidas en una laguna de Colombia por Sánchez & Zea (2000); y en las lagunas costeras brasileñas por Chagas & Suzuki (2005). Este último caso mostró una clara evidencia de la eutrofización principalmente durante la temporada de lluvias, cuando se tuvieron aportes de materia orgánica debido a las actividades antropogénicas.…”
Section: Discussionunclassified