Upwelling and downwelling at Cabo Frio (Brazil): comparison of biomass and primary production responses

Gonzalez‐Rodriguez, Eliane; Valentin, Jean Louis; Andre, Dalmo L.; Jacob, Salvador A.

doi:10.1093/plankt/14.2.289

Cited by 123 publications

(71 citation statements)

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“…In the Cabo Frio system, nitrate is the main limiting nutrient but phosphate and to a lesser degree iron and molybdenum are also important in the regulation of phytoplankton biomass growth (GONZALEZ-RODRIGUEZ, 1991). Chlorophyll a concentrations reported in the main upwelling area of the Cabo Frio region varied between 0.5 and 6.0 mg/m 3 (GONZALEZ-RODRIGUEZ et al, 1992;PEREIRA et al, 2009a) but a value of 21 mg/m3 was observed during a microalgae bloom in the Cabo Frio Embayment. These values are comparable with those found in shelf and coastal areas of the southern and eastern Pacific (MONTECINO et al, 2004;PENNINGTON et al, 2006).…”

Section: Physical-biological Interactions: Ecological Consequences Ofmentioning

confidence: 96%

“…SACW has a higher temperature and lower nutrient concentrations at Cabo Frio as compared to the water of the Benguela system, since nitrate values fall from 30 µM in the Benguela system (BROWN; FIELD, 1986) to as little as 18 µM in the Cabo Frio region (GONZALEZ-RODRIGUEZ et al, 1992). In the Canary Is.…”

Section: Physical-biological Interactions: Ecological Consequences Ofmentioning

confidence: 99%

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Biophysical interactions in the Cabo Frio upwelling system, southeastern Brazil

et al. 2012

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A B S T R A C TThe rising of cold water from deeper levels characterizes coastal upwelling systems. This flow makes nutrients available in the euphotic layer, which enhances phytoplankton production and growth. On the Brazilian coast, upwelling is most intense in the Cabo Frio region (RJ). The basic knowledge of this system was reviewed in accordance with concepts of biophysical interactions. The high frequency and amplitude of the prevailing winds are the main factor promoting the rise of South Atlantic Central Water, but meanders and eddies in the Brazil Current as well as local topography and coast line are also important. Upwelling events are common during spring/summer seasons. Primary biomass is exported by virtue of the water circulation and is also controlled by rapid zooplankton predation. Small pelagic fish regulate plankton growth and in their turn are preyed on by predatory fish. Sardine furnishes an important regional fish stock. Shoreline irregularities define the embayment formation of the Marine Extractive Reserve of Arraial do Cabo making it an area with evident different intensities of upwelled water that harbors high species diversity. Consequently, on a small spatial scale there are environments with tropical and subtropical features, a point to be explored as a particularity of this ecosystem. R E S U M OOs sistemas costeiros de ressurgência são caracterizados pela ascensão de águas frias que tornam os nutrientes disponíveis na camada eufótica para o crescimento e aumento da produção fitoplanctônica. No Brasil, a região do Cabo Frio (RJ) é o principal sistema de ressurgência costeira. O objetivo desse artigo foi revisar o atual conhecimento desse sistema através dos conceitos sobre interações biofísicas. A ascensão da Água Central do Atlântico Sul ocorre devido à alta frequência e amplitude dos ventos, à presença de meandros e vórtices na Corrente do Brasil, além da topografia local e da linha de costa. Os eventos de ressurgência são comuns durante os períodos de primavera/verão e a biomassa primária é exportada devido à circulação da água, sendo também controlada pela rápida predação zooplanctônica. Os pequenos peixes pelágicos regulam o crescimento do plâncton e são consumidos pelos peixes predadores, resultando em um importante estoque pesqueiro regional. A irregularidade da costa define as enseadas do Cabo Frio, na Reserva Extrativista Marinha do Arraial do Cabo, apresentando distintas influências das águas ressurgidas e resultando em grande diversidade de espécies. Consequentemente, ambientes com características tropicais e subtropicais são observados dentro de uma pequena escala espacial, o que constitui uma particularidade desse ecossistema.

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Section: Physical-biological Interactions: Ecological Consequences Ofmentioning

confidence: 96%

Section: Physical-biological Interactions: Ecological Consequences Ofmentioning

confidence: 99%

Biophysical interactions in the Cabo Frio upwelling system, southeastern Brazil

et al. 2012

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“…The planktonic dinoflagellate Prorocentrum minimum was induced to prey in limiting nitrogen and phosphorus experimental conditions and feeding was never observed under nutrient replete conditions (JOHNSON, 2015). The study area is among the most productive regions in the Brazilian littoral due to the occurrence of coastal upwelling, particularly during austral summer that sustains high primary productivity and marine biodiversity (VALENTIN, 1984;GONZALEZ-RODRIGUEZ et al, 1992). Therefore, it is likely that benthic dinoflagellates from the study area were nutrient sufficient, a condition that would not stimulate the occurrence of phagotrophy.…”

Section: Discussionmentioning

confidence: 97%

Investigation of phagotrophy in natural assemblages of the benthic dinoflagellates Ostreopsis, Prorocentrum and Coolia

2017

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Almada et al.: Phagotrophy assessment in benthic dinoflagellates 392 Investigation of phagotrophy in natural assemblages of the benthic dinoflagellates Ostreopsis, Prorocentrum and CooliaMixotrophy has been shown to be a common trait among dinoflagellates and its importance in the nutritional ecology of harmful algae has been hypothesized. Benthic harmful species have not been extensively investigated as their planktonic counterparts and there are major gaps in the knowledge of their nutritional strategies. In this study the occurrence of phagotrophy was investigated in natural assemblages of benthic dinoflagellates using epi-fluorescence microscopy with DAPI and LysoSensor staining. The study was conducted at five sites along the coast of Rio de Janeiro that were visited in January, August and December 2010. In total, 1659 dinoflagellate cells were observed. From these, only 0.4% of 1195 Ostreopsis cf. ovata and 2.2% of 134 Coolia spp. cells presented evidence of phagotrophy with vacuoles stained by LysoSensor or a DAPI (4',6-diamidino-2-phenylindole) stained inclusion. Stained vacuoles were not registered in the 330 Prorocentrum spp. cells observed. Few O. cf. ovata cells contained round red inclusions ("red spots") that were not stained either by DAPI or LysoSensor, suggesting that these structures are not ingested prey. The results showed that phagotrophy was not a frequent nutritional strategy in benthic dinoflagellates during the study period. AbstrAct Descriptors:Dinoflagellates, LysoSensor, Mixotrophy, Phagotrophy.A mixotrofia tem se mostrado uma característica comum entre dinoflagelados e a sua importância na ecologia nutricional de algas nocivas vem sendo investigada. Espé-cies bentônicas nocivas não foram tão estudadas quanto as planctônicas, e existem grandes lacunas no conhecimento de suas estratégias nutricionais. A ocorrência de fagotrofia em comunidades naturais de dinoflagelados bentônicos foi investigada usando microscopia de epi--fluorescência e marcação por DAPI e LysoSensor. O estudo foi realizado em cinco locais ao longo da costa do Rio de Janeiro nos meses de janeiro, agosto e dezembro de 2010. No total, foram observadas 1659 cé-lulas de dinoflagelados. Destas, apenas 0,4% das 1195 células de Ostreopsis cf. ovata e 2,2% das 134 células de Coolia spp. observadas apresentaram evidências de fagotrofia com vacúolos marcados por LysoSensor ou inclusão celular marcada por DAPI (4', 6-diamidino-2--phenylindole). Não foram observados vacúolos marcados nas 330 células de Prorocentrum spp. observadas. Células de O. cf. ovata apresentaram inclusões esféricas avermelhadas ("red spots") que não foram coradas por DAPI e LysoSensor, sugerindo que estas estruturas não correspondem a presas ou a vacúolos digestivos. Os resultados mostraram que a fagotrofia não foi uma estraté-gia nutricional frequente nas espécies de dinoflagelados bentônicos observadas durante o período de estudo. resumoDescritores: Dinoflagelados, LysoSensor, Mixotrofia, Fagotrofia.

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“…The particular orientation of the Rio de Janeiro coast, with coastline changing abruptly from north-south to eastwest direction, moves the coastal water away from the coast and toward the ocean, and favors the intrusion and spread of the SACW. This water mass occurs at the thermocline depth in the open ocean, which intrudes over the inner continental shelf near the bottom, and eventually upwells to the surface near the coast (Moreira da Silva, 1971;Gonzalez-Rodriguez et al, 1992;Campos et al, 2000;Mahiques et al, 2005). The rise of the SACW determines the local upwelling events, and the magnitude of these events is influenced by winds, the configuration of the coast and by the ocean-bottom topography of the Cabo Frio region (Stramma & Peterson, 1990;Rodrigues & Lorenzetti, 2001).…”

Section: Study Areamentioning

confidence: 99%

Ecological distribution of Nematopalaemon schmitti and Exhippolysmata oplophoroides (Crustacea: Caridea) near an upwelling area off southeastern Brazil

Herrera

Pescinelli

Costa

2017

lajar

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ABSTRACT.Regions affected by upwelling show environmental characteristics that may change the distribution of the species. This study evaluated the influence of environmental factors on the spatiotemporal distribution of two caridean shrimps, Nematopalaemon schmitti and Exhippolysmata oplophoroides, in a region of the Brazilian coast affected by Cabo Frio upwelling. Shrimps were collected monthly from July 2010 through June 2011 off Macaé off the northern coast of Rio de Janeiro State, at six locations: three at 5 m, and the other three at 15 m depth. Shrimp abundance was compared among seasons and sampling sites. Nematopalaemon schmitti (n = 1200) was more abundant at 5 m depth while E. oplophoroides (n = 2176) occurred predominately at 15 m. There were significant seasonal fluctuations in the distribution of the species in the region, resulting from variation in bottom temperature. The presence of the South Atlantic Central Water (SACW) favors the decrease in the abundance of N. schmitti and highest abundance of E. oplophoroides. The abundance of E. oplophoroides and the percentage of organic matter were significantly and positively correlated. The organic matter content in the sediment and water temperature was among the most important variables affecting seasonal distribution of the species. The distinct environmental characteristic between the bathymetric regions were a determinant factor in their spatial distribution.

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Upwelling and downwelling at Cabo Frio (Brazil): comparison of biomass and primary production responses

Cited by 123 publications

References 0 publications

Biophysical interactions in the Cabo Frio upwelling system, southeastern Brazil

Biophysical interactions in the Cabo Frio upwelling system, southeastern Brazil

Investigation of phagotrophy in natural assemblages of the benthic dinoflagellates Ostreopsis, Prorocentrum and Coolia

Ecological distribution of Nematopalaemon schmitti and Exhippolysmata oplophoroides (Crustacea: Caridea) near an upwelling area off southeastern Brazil

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