Intratidal Variation and Net Transport of Dissolved Inorganic Nutrients, POC and Chlorophyll a in the Camboriú River Estuary, Brazil

Filho, Jurandir Pereira; Schettini, Carlos Augusto França; Rörig, Leonardo Rubi; Siegle, Eduardo

doi:10.1006/ecss.2001.0782

Cited by 56 publications

(38 citation statements)

References 15 publications

(14 reference statements)

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“…Asymmetry has also been explained as due to the fact that "a fraction of the water that enters the lagoon during flood tide may already have entered it during previous tidal cycles, thereby further contributing to the consistently high level of Chl-a and SM" (PEREIRA-FILHO et al, 2001). Tidal asymmetry for a semi-diurnal neap tide in May had an average duration of 3.2 h, and that for a diurnal spring tide in September one of 6.17 h. It is believed that the entry of water through Boca Galindo and the drainage of the basin in the rainy season (September) enhanced this asymmetry.…”

Section: Discussionmentioning

confidence: 99%

“…The dynamics of nutrients, chlorophylls, suspended materials and salt concentrations, in shallow coastal lagoons directly connected to the sea, have been widely studied and discussed (HSIEH et al, 2010;MOSER et al, 2005;PEREIRA-FILHO et al, 2001). The La Mata Channel presents an untypical morphologic feature; it is connected to the sea by means of the Tuxpan River.…”

Section: Introductionmentioning

confidence: 99%

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Export of materials along a tidal river channel that links a coastal lagoon to the adjacent sea

et al. 2012

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A B S T R A C TIntratidal variability and flux of salt, chlorophyll-a and suspended materials were evaluated in a shallow tropical tidal channel linking a coastal lagoon to the western Gulf of Mexico. Velocity, temperature and conductivity were used to calculate the fluxes. Data were recorded during three tidal velocity cycles (tvc) under extreme river discharge conditions. Chlorophyll-a and suspended materials were determined below the surface. In both seasons (dry and rainy), the flow was ebbdominated and with longer duration than when in flood. Maximum current velocities were 0.30 m s -1 in May (dry season) and 0.60 m s -1 in September (rainy season). In the dry season the mean chlorophyll-a export was of 7.56 Kg over tvc while the import was of 3.32 Kg. In the rainy season mean export (47.3 Kg) was 6 times greater than the import (7.93 Kg over tvc). Phytoplankton was dominated by organisms of marine origin. The mean of exported, suspended materials in the rainy season (111.3 Kg) was 4.6 times greater (859 Kg) than that in the dry season (184.7 Kg over tvc). Tidal velocity asymmetry is an effective mechanism of exportation, introducing relatively warm and saltier water into the river through the tidal channel. R E S U M OA variabilidade intramaré, o fluxo de salinidade, a clorofila-a e material em suspensão foram avaliados em um canal superficial de maré tropical em uma lagoa costeira ao oeste do Golfo do México. Os dados de velocidade, temperatura e condutividade foram usados para cálculo dos fluxos durante três ciclos de velocidades das marés (tvc) sob condições extremas de descarga. A Clorofila-a e material em suspensão foram determinados abaixo em subsuperfície. Em ambas as estações (seca e chuvosa), o fluxo dominante foi durante o refluxo e com duração maior durante o fluxo de entrada. A máxima velocidade encontrada foi 0.30 m s -1 em maio (estação seca) e 0.60 m s -1 em setembro (estação chuvosa). Durante a época seca foram exportadas 7.56 Kg de clorofila-a, enquanto a importação foi de 3.32 Kg. Durante a temporada de chuva a média exportada (47.3 Kg) foi seis vezes maior que a importada (7.93 Kg). A concentração media de material em suspensão exportado durante a época de chuvas (111.3 Kg) foi 4.6 vezes maior (859 Kg) que durante estação de seca (184.7 Kg). A assimetria das marés é um mecanismo efetivo de transporte, introduzindo no rio águas relativamente quentes e mais salinas através do canal de maré.

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Section: Discussionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Export of materials along a tidal river channel that links a coastal lagoon to the adjacent sea

et al. 2012

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“…Os sistemas estuarinos são os principais fornecedores de nutrientes para a região costeira, pois recebem e concentram o material originado de sua bacia de drenagem e podem vir a receber aportes significativos por ação antrópica. Todo esse aporte de nutrientes, matéria prima para a produção primária, coloca os estuários entre os sistemas mais produtivos do mundo, com altas taxas de produção primária e teores de biomassa autótrofa e heterótrofa (Pereira Filho et al, 2001). Estima-se que 28% da produção primária global ocorra em áreas costeiras, sendo que estes sistemas cobrem apenas 8% da superfície da terra (Jonge et al, 2002).…”

Section: Introductionunclassified

“…A atividade de coleta acompanhou um ciclo completo de maré semidiurna, de 13 horas, o que torna os resultados representativos para uma avaliação inicial das condições oceanográficas do estuário do Rio Perequê. O objetivo deste manuscrito é apresentar estes resultados como uma primeira caracterização das condições físicas e químicas, tendo como motivação a esparsa bibliografia que trata de sistemas de pequenas dimensões (e.g., Schettini et al, 2000;Pereira Filho et al, 2001).…”

Section: Introductionunclassified

Hidrodinâmica e nutrientes inorgânicos dissolvidos no estuário do Rio Perequê, SC

Signorin

Filho

Delfim

et al. 2010

Braz. J. Aquat. Sci. Technol.

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, mainly because the contribution of NH 4 + (74%), indicating presence of domestic sewage. The DIN presented inverse relationship with salinity, meanwhile the chlorophyll showed direct relationship. The silicate and phosphate did not presented relationship with salinity. The water quality in the lower estuary was mainly driven by estuary-shelf exchanges, and presented poor horizontal mixing between estuarine and coastal waters.

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“…The maximum chlorophyll occurred in the transition between fluvial and brackish waters, and also reflects the eutrophication of the estuary (e.g. PEREIRA FILHO et al, 2001). Figure 3 shows the results in terms of longitudinal variation at the surface layer (0.3 -1.3 m, = 11 readings) for salinity and SPM from the CTD, and at 1 m below the surface (= 20 readings) for volume concentration, particle size and transmittance from LISST.…”

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confidence: 99%

Observation of an Estuarine Turbidity Maximum in the Highly Impacted Capibaribe Estuary, Brazil

et al. 2016

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Intratidal Variation and Net Transport of Dissolved Inorganic Nutrients, POC and Chlorophyll a in the Camboriú River Estuary, Brazil

Cited by 56 publications

References 15 publications

Export of materials along a tidal river channel that links a coastal lagoon to the adjacent sea

Export of materials along a tidal river channel that links a coastal lagoon to the adjacent sea

Hidrodinâmica e nutrientes inorgânicos dissolvidos no estuário do Rio Perequê, SC

Observation of an Estuarine Turbidity Maximum in the Highly Impacted Capibaribe Estuary, Brazil

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