The response of surf-zone phytoplankton to nutrient enrichment (Cassino Beach, Brazil)

Piedras, Fernanda Reinhardt; Odebrecht, Clarisse

doi:10.1016/j.jembe.2012.07.020

Cited by 20 publications

(5 citation statements)

References 30 publications

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“…Fi=frequency of occurrence. 2011; PIEDRAS; ODEBRECHT, 2012;ODEBRECHT et al, 2014), our results confirm that A. blackburni has a generalist strategy and feeds on any available organisms. Furthermore, seasonality has been an important factor for the population structure throughout the year, with smaller fish captured during the dry season, particularly during the autumn and winter.…”

Section: Discussionsupporting

confidence: 73%

Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil

Gonzalez

Júnior

2017

Braz. j. oceanogr.

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Gonzalez and Vaske Junior: Feeding of Atherinella blackburni in Brazil 346Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil A ecologia alimentar do peixe-rei (Atherinella blackburni) na zona de arrebentação de uma praia arenosa tropical, localizada no sudeste do Brasil, foi acessada a partir da análise do conteúdo alimentar de 198 peixes. Fatores como o tamanho, a estação do ano e o período do dia foram analisados para compreender como estes influenciam a dieta da espécie. Os resultados mostram que A. blackburni é um peixe nerítico costeiro com amplo nicho alimentar. As presas mais recorrentes foram os crustáceos zooplanctônicos, insetos e moluscos bentônicos, sendo os crustáceos da subclasse Copepoda o item dominante na dieta em ocorrência e abundância. A. blackburni aparenta possuir uma leve mudança ontogênica em sua dieta, variando de moluscos bentônicos para crustáceos e em seguida para insetos ao longo do seu ciclo de vida. A atividade diária também demonstrou ser um fator importante para a ecologia alimentar de A. blackburni. O predomínio de peixes pequenos durante o período da manhã, juntamente com as principais presas para esta classe de tamanho, sugere que indivíduos pequenos utilizem as áreas mais rasas para alimentação durante o período da manhã e, durante a noite, movem-se para águas mais profundas em busca de proteção contra predadores. A. blackburni appears to have a slight ontogenetic shift in its diet, changing from benthic molluscs to crustaceans and insects along its life cycle. The diel activity also reveals to be an important factor to the A. blackburni feeding ecology. The predominant occurrence of small fish during the morning, along with the main preys for this size class, suggests that small individuals use shallower waters as feeding grounds during the morning and, during the night, they move to deeper waters for protection against predators. Resumo AbstRActDescriptors: Diel activity, Diet, Ontogenetic shift, Resources partitioning, Surf zone, Zooplanktivorous.

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Section: Discussionsupporting

confidence: 73%

Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil

Gonzalez

Júnior

2017

Braz. j. oceanogr.

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“…Seawater is essentially oligotrophic, with plenty of light in upper layers but nutrients are limited throughout the year (Gong et al, 1992;Ning et al, 2004). The upwelling systems off the west coast of the SCS, where deeper nutrients are uplifted into the shallow layers, prove to be key locations of phytoplankton growth (Figure 1B) (Chen et al, 2006;Piedras and Odebrecht, 2012;Behrenfeld and Boss, 2014).…”

Section: Introductionmentioning

confidence: 99%

Summer Phytoplankton Blooms Induced by Upwelling in the Western South China Sea

2021

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During summer, phytoplankton blooms occur frequently off the southeast Vietnam coast in the western South China Sea (WSCS). Using multi-source remote sensing data, such as sea surface temperature (SST), sea surface wind (SSW), aerosol optical thickness (AOT), sea level anomalies (SLA), and chlorophyll-a (Chl-a) data from 1998 to 2020 and in situ observations of analyzed data, we report the patterns of spatial variation of summer phytoplankton blooms in this region. The partial correlation and multiple stepwise linear regression analyses reveal that Ekman transport (ET) and Ekman pumping velocity (EPV) exert a greater impact on the summer phytoplankton blooms than the other environmental factors, suggesting that the phytoplankton blooms in the region may be mainly triggered by the enhanced nutrients by wind-induced upwelling and vertical mixing. AOT only weakly correlates with Chl-a concentration in the region, probably these prominent abundant nutrients in the region come from upwelling and convective-overturn. A northeastward jet causes the distribution of high Chl-a in the WSCS to be plume-shaped. A new finding in this study is that the northward current in this area may cause the northward deviation of phytoplankton blooms from the areas of upwelling.

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“…As such, blooms of Pseudo-nitzschia spp. are common after large nutrient inputs, even if these blooms occur occasionally during local oscillations in salinity (MAFRA Jr. et al, 2006;LIEFER et al, 2009;PIEDRAS;ODEBRECHT, 2012).…”

Section: Resultsmentioning

confidence: 99%

SEASONAL AND SPATIAL PATTERNS OF TOXIGENIC SPECIES OF Dinophysis AND Pseudo-nitzschia IN A SUBTROPICAL BRAZILIAN ESTUARY

2015

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in Guaratuba Bay, Paraná state, Brazil, where aquaculture has been intensified in recent years. The highest abundances of Pseudo-nitzschia calliantha and P. pungens (up to 7.3 x 104 cells L -1 ), diatoms which cause amnesic shellfish poisoning (ASP), were correlated with higher values of temperature (from December to April, salinity (>20) and silicate concentrations (ranging from 6.0 to 90.0 µm). The occurrence of these harmful diatoms in the bay also appeared to depend upon the development of seeding mechanisms in the adjacent coastal water and its subsequent advection by tidal currents to the interior of the estuary. During the study period, Pseudo-nitzschia cell abundance remained low to moderate probably as a result of growth limitation by phosphate shortage, especially in the outer area of the estuary. In addition, harmful species of Dinophysis, dinoflagellates responsible for diarrhetic shellfish poisoning (DSP) events, were recorded in every sampling campaign. The highest abundances of D. acuminata, D. caudata and D. tripos were associated with the upper halocline layer in regions of the bay where water column stratification was more frequent. On some occasions, cell abundances of D. acuminata (up to 3.2 x 10³ cells L -1 ) exceeded levels considered harmful in areas used to cultivate bivalve mollusks for human consumption. These novel results strongly indicate the necessity of implementing a monitoring program for harmful microalgae in Guaratuba Bay. R E S U M OEste estudo investigou a distribuição espacial e temporal de espécies toxigênicas de fitoplâncton entre outubro de 2010 e abril de 2012 na Baía de Guaratuba, Estado do Paraná, Brasil, onde as atividades de maricultura têm se intensificado nos últimos anos. As maiores abundâncias de Pseudo-nitzschia calliantha e P. pungens (até 7,3 x 104 células L -1 ), diatomáceas causadoras do envenenamento amnésico por consumo de molusco (ASP), foram correlacionadas com valores mais elevados de temperatura (de dezembro a abril), salinidade (>20) e concentrações de silicato (variando de 6,0 a 90,0 µM). A ocorrência destas diatomáceas na baía aparentemente depende do desenvolvimento de mecanismo de inoculação na água costeira adjacente e de seu subsequente transporte pelas correntes de maré para o interior do estuário. Durante o período de estudo, no entanto, a abundância celular de Pseudo-nitzschia permaneceu baixa, provavelmente devido à limitação do crescimento por falta de fosfato, especialmente na área externa. Além disso, espécies nocivas de Dinophysis, um dinoflagelado responsável pela produção de toxinas diarreicas (DSP), foram registradas em todas as campanhas mensais de amostragem. As maiores abundâncias de D. acuminata, D. caudata e D. tripos foram associadas com a camada logo acima da haloclina, nas regiões da baía onde a estratificação da coluna de água foi mais frequente. Em algumas ocasiões, a abundância de células de D. acuminata (até 3,2 x 10³ células L -1 ) em áreas utilizadas para cultivo de moluscos bivalves para consumo humano, superou níveis c...

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The response of surf-zone phytoplankton to nutrient enrichment (Cassino Beach, Brazil)

Cited by 20 publications

References 30 publications

Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil

Feeding ecology of the beach silverside Atherinella blackburni (Atherinopsidae) in a tropical sandy beach, Southeastern Brazil

Summer Phytoplankton Blooms Induced by Upwelling in the Western South China Sea

SEASONAL AND SPATIAL PATTERNS OF TOXIGENIC SPECIES OF Dinophysis AND Pseudo-nitzschia IN A SUBTROPICAL BRAZILIAN ESTUARY

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