Seasonal and interannual coupling between sea surface temperature, phytoplankton and meroplankton in the subtropical south-western Atlantic Ocean

Fernandes, Lohengrin Dias de Almeida; Quintanilha, Jurema; Monteiro-Ribas, Wanda Maria; Gonzalez‐Rodriguez, Eliane; Coutinho, Ricardo

doi:10.1093/plankt/fbr106

Cited by 25 publications

(26 citation statements)

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“…The bloom of large cells (mainly diatoms) during upwelling in the region benefits mesozooplankton grazing and increases ecological efficiency (FERNANDES et al, 2012). P. quasimodo was the copepod that benefited most from the peaks in chlorophyll, thus confirming the work of ESKINAZI and ANNA (2013) which referred to this species as one of the major top-controllers of primary production on the Brazilian coast.…”

Section: Discussionsupporting

confidence: 74%

“…In contrast, from September to December, the cold nutrientrich South Central Atlantic Water is brought from a deep layer to near the surface and fuels primary productivity, increasing the chlorophyll in the region (e.g. BRANDINI et al, 1997; CARVALHO; GONZALEZ-RODRIGUEZ, 2004;FERNANDES et al, 2012).…”

Section: Discussionmentioning

confidence: 99%

“…The more trophic levels there are, the greater is the complexity and the lower the ecological efficiency of the system as a consequence of the energy lost as heat (SAUTOUR et al, 2000). Seasonally, upwelling brings new nutrients from deeper layers and fuels the growth of large cells such as Diatoms, which in turns speeds up the energy flow through the food web (SAUTOUR et al, 2000;FERNANDES et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…We know that many organisms, such as barnacles and mussel larvae (FERNANDES et al, 2012), benefit from that increase in food availability, as also do copepods (BRANDINI et al, 1997), by synchronizing their reproductive peaks with the spring bloom of phytoplankton, which makes them an important target in the global scenario. Due to the geographical, meteorological and hydrological factors relating to Cabo Frio, the upwelling favors the microalgae bloom, influencing the marine food web in the region (FERNANDES et al, 2012).…”

Section: Introductionmentioning

confidence: 99%

“…Due to the geographical, meteorological and hydrological factors relating to Cabo Frio, the upwelling favors the microalgae bloom, influencing the marine food web in the region (FERNANDES et al, 2012). Paracalanus quasimodo is the most abundant herbivorous copepod in the region (BRANDINI et al, 1997) and is one of the top-down controllers of the growth of phytoplankton.…”

Section: Introductionmentioning

confidence: 99%

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Herbivorous copepods with emphasis on dynamic Paracalanus quasimodo in an upwelling region

2016

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Coastal upwelling is known to transfer the nutrientrich water from the deep ocean to the surface, which benefits primary production and consequently increases local organic production. Cabo Frio is favored by the phenomenon and copepods are one of the groups most benefited. According to the results presented here, the higher abundances of Pacalanus quasimodo relative to other species are due to its rapid response to upwelling-dependent blooms. Therefore this study aims to assess the herbivory and dynamics of many copepod populations with emphasis on P. quasimodo. The results showed that temperature influences primary production, which in turn benefits the seston biomass (R2 = 0.65, p = 0.008). The dominance of P. quasimodo was due to its emphasis on herbivory (R2 = 0.83) and lead to a decrease in the planktonic diversity (R2 = 0.63, p = 0.002). Our results revealed that predation by carnivorous copepods, like Corycaeus spp. and Oncaea spp. is the main opposing factor affecting P. quasimodo dominance. (R2 = 0.70, p = 0.004; βpredators = 0.41, p = 0.04). A ressurgência transfere a água rica em nutrientes do fundo dos oceanos para a superfície, o que beneficia a produção primária e, consequentemente, aumenta a produção biológica local. Cabo Frio é favorecido pelo fenômeno e os copépodes são um dos grupos mais beneficiados. Os resultados mostraram que Pacalanus quasimodo foi a espécie mais abundante em relação às demais devido sua resposta rápida à floração. Assim, este estudo tem como objetivo avaliar a herbivoria e dinâmica das populações de copépodes, com ênfase em P. quasimodo. Os resultados mostraram que a temperatura influencia a produção primária, que, por sua vez, favorece a biomassa séston (R2 = 0,65, p = 0,008). A dominância de P. quasimodo deveu-se à disponibilidade de alimento (R2 = 0,83) e a elevada densidade da população leva a um decréscimo da diversidade (R2 = 0,63, p = 0,002). Nossos resultados revelaram que a predação por copépodes carnívoros, como Corycaeus spp. e Oncaea spp., é o principal fator que afeta a dominância de P. quasimodo (R2 = 0,70, p = 0,004; βcopépodes predador = 0,41, p = 0,04). AbstrAct

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Section: Discussionsupporting

confidence: 74%

Section: Discussionmentioning

confidence: 99%