Distribuição Espaçotemporal Dos Parâmetros Abióticos E Bióticos Em Um Estuário Amazônico (Brasil)

Santos, Arielly Siqueira dos; Sousa, Pedro Henrique Campos; Melo, Nuno Filipe Alves Correia de; Mesquita, Karina Ferreira Castro; Pereira, José Almir Rodrigues; Santos, Maria de Lourdes Souza

doi:10.32360/acmar.v53i1.41888

Cited by 8 publications

(5 citation statements)

References 16 publications

(21 reference statements)

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“…Seasonal and spatial variation of salinity was very significant (p < 0.05), as expected, since they were probably influenced by rainfall regimes in the regions, considering that the higher the precipitation, the lower the environmental salinity rates tend to be (Santos et al, 2020). It is important to emphasize that the salinity at the sample points (p < 0.05 ANOVA oneway) also varied in the region of São Luís and São José de Ribamar, where the tide-control structures may influence not only the organisms but also some abiotic parameters.…”

Section: Discussionsupporting

confidence: 77%

Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

Nunes

Silva

Oliveira

et al. 2021

RSD

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Zooplankton is a group of organisms that can help to understand the quality of aquatic ecosystems, as they are responsible for transforming energy matter, thus making it available to other links, making them important in aquatic trophodynamics. This study analyzed spatial and temporal variations in zooplankton communities found in two tidal control structures on Ilha do Maranhão, northeastern Brazil. Sampling took place from September 2017 to July 2018. Abiotic parameters (temperature, salinity, and transparency) and plankton samples were recorded monthly throughout the study period at each sampling site. The results found for the abiotic parameters showed a well-defined pattern, with a clear division between the dry and rainy periods. Forty taxa represented the zooplankton community of the São Luís tidal control structure, and from São José de Ribamar by 21 taxa, represented mainly by copepods, ichthyoplankton, foraminifera, polychaetes, and mollusks. The analysis of ecological indices of richness, evenness, and diversity showed a difference in the distribution of organisms among the study areas. We identified an important influence of the physicochemical parameters on the zooplankton communities of São Luís and São José de Ribamar, according to the statistical analyzes used in this study.

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Section: Discussionsupporting

confidence: 77%

Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

Nunes

Silva

Oliveira

et al. 2021

RSD

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“…O n-amoniacal foi a espécie predominante entre os compostos nitrogenados, que apresentou concentrações estáveis e distribuiu-se linearmente em todo o estuário. Sua variação longitudinal pode estar relacionada ao processo de nitrificação, com o n-amoniacal resultante da conversão do nitrato ou nitrito, tornando as concentrações desta forma relativamente mais baixas, Santos et al, (2020), corrobora em seus estudos o comportamento semelhante na distribuição espaçotemporal dos parâmetros abióticos e bióticos em um estuário Amazônico (Brasil). De acordo com Monteiro (2015) este processo pode ter sido controlado pelo aporte dos sedimentos do fundo, uma vez que ao longo das margens do furo que ficam do lado da comunidade Beira Mar temse as menores profundidades.…”

Section: Discussionunclassified

Dinâmica Sazonal de Nutrientes em Estuário Amazônico

Mourão

Santos

Sousa³

et al. 2021

Rev. Bras. Geog. Fis.

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As variações nos ecossistemas naturais exigem uma atenção da sociedade para a água, pois o risco de desabastecimento não é um problema localizado, é uma questão nacional. Avaliou-se o efeito da sazonalidade na qualidade da água no furo do Muriá, Curuçá, Pará. As coletas de água foram realizadas em 21 pontos distribuídos ao longo do Furo, nos meses de fevereiro, março, outubro e novembro de 2015, durante as marés vazante e enchente. As variáveis abióticas foram determinadas in situ com utilização de sonda. As análises de OD foram determinadas pelo método de Winkler (Strickland e Parsons, 1972), taxa de saturação de OD segundo tabela da UNESCO (1973), os nutrientes conforme descritos em Grasshof et al. (1983), o N-amoniacal segundo APHA (1995) e Clorofila a segundo Teixeira (1973). As variáveis ambientais apresentaram diferenças significativas entre os períodos analisados (p<0,05), tendendo a um padrão sazonal, exceto N-amoniacal (p>0,05) logo não teve influência sazonal. Levando em consideração as marés as concentrações de salinidade, CE e clorofila-a foram significativas durante a maré enchente. A turbidez foi mais elevada durante as marés de vazante (p<0,05). Os parâmetros fosfato e N-amoniacal não apresentaram diferença significativa entre marés (p>0,05). O efeito da sazonalidade pode restringir à variação da qualidade do ambiente, logo indica a relevância do monitoramento do ambiente, assim servir de ferramenta em planos de políticas públicas de melhoria do saneamento da população. Sazonal Dynamics of Nutrients in Amazonian EstuaryA B S T R A C TVariations in natural ecosystems require society's attention to water, as the risk of shortages is not a localized problem, it is a national issue. The effect of seasonality on water quality in the Creek Muriá, Curuçá, Pará, Brazil, was evaluated. Water samples were collected at 21 points along the Creek during February, March, October and November 2015, during Tides and flood. Abiotic variables were determined in situ using probe. The parameters of Dissolved Oxygen (OD), saturation rate of OD (% OD), Chlorophyll a (Cl-a), Phosphate (Fosf), Nitrite (NO2), Nitrate (NO3) and N-ammonical (N- Master). The environmental variables presented significant differences between the analyzed periods (p <0.05), tending to a seasonal pattern, except for N-ammoniacal (p> 0.05), thus not having a seasonal influence. Taking into account the tides the concentrations of salinity, EC and chlorophyll-a were significant during tide flood. The turbidity was higher during tidal ebb tides (p <0.05). The phosphate and N-ammonia parameters showed no significant difference between tides (p> 0.05). The effect of seasonality may restrict the variation of the quality of the environment, thus indicating the relevance of environmental monitoring, thus serving as a tool in public policy plans to improve population sanitation.Keywords: Chlorophyll a; nutrients; tide

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“…In the present work, the influence observed in the distribution of temperature values was related to the collection time, as shown in Figure 3b, at 4:40 pm the highest temperature value was observed (Table 1). Effects of the hydrodynamics of Guamá river estuary on the dispersion of organic load in Tucunduba Igarapé, Belém, Pará (Brazil) State Santos et al (2020) observed small variations in temperature and pH between tides in an estuarine area in the State of Pará (Guajará-Mirim Estuary). The small variation in pH (Figure 3a) is related to the existing buffering effect in aquatic ecosystems, which is verified by the slightly acidic values found in the present study.…”

Section: /10mentioning

confidence: 99%

“…Despite the acidic values, it was observed that the pH was within the acceptable value for aquatic environments described by Hasan et al (2022): pH less than 7 but greater than 8.5 is not ideal for productivity, and less than 4 is considered harmful to aquatic life. Waters from the estuaries of the State of Pará has acidic pH values and is related to the local geology (Oliveira et al, 2022;Santos et al, 2020;Varela et al, 2020).…”

Section: /10mentioning

confidence: 99%

Effects of the hydrodynamics of Guamá river estuary on the dispersion of organic load in Tucunduba Igarapé, Belém, Pará (Brazil) State

Lima,

Rodrigues,

Pereira

et al. 2023

RBRH

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The objective of this study was to evaluate the contribution of the organic load to Tucunduba Igarapé. The data were collected over 12 h for continuous analysis of physical variables, and every 3 h for physicochemical analysis. The cross-sectional profile and flow rate were measured using an accustic doppler current profile, and the load of organic matter was estimates using equations. Three distinct flow periods were verified, two of which were governed by the hydrodynamics of the Guamá River estuary and the other by unidirectional flow from Tucunduba Igarapé to the Guamá River estuary. The organic loads of biochemical oxygen demand (0,03 kg d-1 – 0,07 kg d-1) produced in Igarapé is greater than the contributions from the Guamá River estuary. The Guamá River estuary exerts a positive effect on the Igarapé by dispersing the produced organic loads and aiding its capacity for self-purification.

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Distribuição Espaçotemporal Dos Parâmetros Abióticos E Bióticos Em Um Estuário Amazônico (Brasil)

Cited by 8 publications

References 16 publications

Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

Spatial and seasonal variation of zooplankton assemblages in two tidal control structures in Northeastern Brazil

Dinâmica Sazonal de Nutrientes em Estuário Amazônico

Effects of the hydrodynamics of Guamá river estuary on the dispersion of organic load in Tucunduba Igarapé, Belém, Pará (Brazil) State

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