Spatial and temporal changes in biomass, production and assemblage structure of mesozooplanktonic copepods in the tropical south-west Atlantic Ocean

Dias, Cristina de Oliveira; Araújo, Adriana Valente de; Vianna, S.C.; Fernandes, Luiz Fernando Loureiro; Paranhos, Rodolfo; Suzuki, Marina Satika; Bonecker, Sérgio Luiz Costa

doi:10.1017/s0025315414001866

Cited by 23 publications

(17 citation statements)

References 43 publications

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“…The total zooplankton abundance at the groundwater discharge site was just slightly and insignificantly higher compared to the control site. The overall abundance was very low at both sites, based on the in general oligotrophic tropic waters of low production (Dias et al, 2015). An even lower total abundance of 0.068 Ind.…”

Section: Discussionmentioning

confidence: 87%

Enhanced Productivity and Fish Abundance at a Submarine Spring in a Coastal Lagoon on Tahiti, French Polynesia

2020

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Submarine groundwater discharge (SGD), the direct discharge of groundwater into the sea, is abundant around the globe. Fresh SGD can occur as focused flow in submarine springs. However, little is known on the impact of submarine springs on marine organisms. For a better understanding of the interaction between SGD and its surrounding organisms, the impact of SGD on the abundance of fish was investigated in a coastal lagoon of Tahiti, French Polynesia. The study is based on the assumption of an enhanced biological production due to increased amounts of nutrient input caused by terrestrial groundwater supply into the sea. Biofouling processes and zooplankton samples were used as indicators for elevated nutrient input due to submarine springs. The main objective was to investigate the effect on the abundance of fish assuming a higher fish abundance possibly caused by a bottom-up control. Presented data show a significantly higher abundance around a submarine spring as well as significantly larger growth of algal turfs exposed to groundwater discharge. Zooplankton evaluations suggest slightly higher abundances around the submarine spring. The results suggest elevated nutrient concentrations transmitted by submarine springs may cause a bottom-up control resulting in a higher abundance of fish around the investigated submarine spring.

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Section: Discussionmentioning

confidence: 87%

Enhanced Productivity and Fish Abundance at a Submarine Spring in a Coastal Lagoon on Tahiti, French Polynesia

2020

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“…The study area is embedded in the Campos Basin that extends from north of Rio de Janeiro State to south of Espírito Santo State, (20°–23°S and 40°–42°W) and is located in a region characterized by two seasonal periods: dry (May–September) and rainy (October–April) (Bonecker, Namiki, Castro, & Campos, ; Dias et al, ; Lacerda, Rezende, Ovalle, & Carvalho, ). The continental shelf has a mean width of 100 km and the slope extends over a width of 40 km (Dias et al, ; Viana et al, ). This area is characterized by oligotrophic water masses with low productivity carried by the Brazil Current (Almada & Bernardino, ; Bonecker et al, ; Ekau & Matsuura, ; Valentin, Paranhos, Faro, & Gonzalez, ).…”

Section: Introductionmentioning

confidence: 99%

“…The study area is embedded in the Campos Basin that extends from north of Rio de Janeiro State to south of Espírito Santo State, (20°-23°S and 40°-42°W) and is located in a region characterized by two seasonal periods: dry (May-September) and rainy (October-April) (Bonecker, Namiki, Castro, & Campos, 2014;Dias et al, 2014;Lacerda, Rezende, Ovalle, & Carvalho, 2004). The continental shelf has a mean width of 100 km and the slope extends over a width of 40 km Viana et al, 1998).…”

Section: Introductionmentioning

confidence: 99%

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

et al. 2019

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Many marine organisms spend the early life history stages in neuston domain. Although the importance of ichthyoneuston, few studies were developed in the Southwest Atlantic Ocean. Therefore, this study aimed to improve the knowledge on ichthyoneuston of the Brazilian coast analyzing the vertical stratification and horizontal distribution of these organisms. Neuston samples were collected in daylight between 20°S and 23°S from February to April 2009 (late summer/early autumn; rainy season) and from August to September 2009 (late winter/early spring; dry season). Eggs of six taxa were identified: Anguilliformes, Engraulidae, Clupeidae, Synodontidae, Trichiuridae, and Maurolicus stehmanni (Sternoptychidae). The neustonic larval fish assemblage was composed by 40 families and 63 species. Mullidae and Myctophidae larvae were the most abundant in the rainy period while Mullidae and Mugilidae dominated in the dry season. Seasonal and spatial variation of larval fish assemblages in the neuston were structured by oceanographic features. The larval fish abundance on the outer slope stations may have been favored by the advection of an anticyclone that encompassed most of the study region during the cruise periods. In the rainy season, salinity and local depth structured the larval fish assemblage in a cross‐shelf gradient, while in the dry season the larval assemblage was structured around temperature and north‐south gradient. In the dry season, the cross‐shelf gradient was less pronounced mainly because of the low abundance and frequency of mesopelagic larvae. The low frequency and abundance of some species are probably related to the net avoidance of fish larvae during the day or dial vertical migration, as many species migrate to deeper layers during the day and ascend to neuston only at night. Nevertheless, the present study presented baseline information about the seasonal and spatial variation of the neustonic larval fish assemblage influenced by the oceanographic conditions in the Campos Basin. We recommend to additionally collect night samples to decrease larval escapement rates and to compare night versus day catches to further investigate the influence of daily migration in the neustonic larval fish in the area.

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“…Además, conforman el mayor componente de la producción secundaria, cumpliendo un papel de intermediario en los procesos de transferencia de energía en las redes tróficas marinas (Sommer & Stibor, 2002;Giraldo, Velasco, & Martínez, 2014;Jaimes & López, 2014;Burd & Thomson, 2015;Dias et al, 2015;López & Mojica, 2015a).…”

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Copépodos epipelágicos en Bahía Cupica, Pacífico colombiano: composición de especies, distribución y variación temporal

Jeréz-Guerrero

Criales-Hernández

Giraldo

2017

RBT

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Epipelagic copepods in Bahía Cupica, Colombian Pacific: species composition, distribution and temporal variation. The study of changes in abundance and composition of copepod species, at different temporal and spatial scales, help to understand the ecosystems function and how the oceanographic dynamics affects their variability and other resources abundances. Since very few studies have been developed on this group in Colombian Pacific coastal areas, the purpose of this study was to assess the spatial and temporal changes in the copepods community distribution at Cupica Bay, between December 2012 and February 2013. For this, oblique plankton hauls were performed along six transects perpendicular to the coast, in 22 stations, using a Bongo Net (30 cm diameter, 2.1 m large, with mesh size 250 µm and 500 µm) equipped with a flowmeter, during two contrasting oceanographic periods. The results showed significant changes in oceanographic conditions and superficial circulation patterns. Fifty two (52) copepods species were identified, from which thirty five (35) were new records for the Colombian Pacific. The biggest copepod abundance was recorded in February 2013 (28 604 ind. 100 m -3 ), and small copepods species were the most dominant. During December 2012, species of the order Poecilostomatida were the most abundant (58.2), but during February were the species of the order Calanoida (69.5 %). The community structure and species composition was characterized by five significant groups, three groups during December 2012 and two during February 2013, dividing the bay in different zones. A positive correlation between temperature and copepods assemblages was evident during both periods, but stronger during December 2012. The results suggested that community structure and species composition of resident copepods in North Colombian Pacific neritic zones, are modelled by the intensity of upwelling, superficial local pattern circulation, and continental freshwater discharges in the region. The results are helpful to understand the copepods community structure, and the future studies should attempt to examine other variables (e.g. effect of food available and oxygen concentration dissolved) to improve understanding of copepods structure in the Pacific coast region of Colombia. Rev. Biol. Trop. 65 (3): 1046-1061. Epub 2017 September 01.

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Spatial and temporal changes in biomass, production and assemblage structure of mesozooplanktonic copepods in the tropical south-west Atlantic Ocean

Cited by 23 publications

References 43 publications

Enhanced Productivity and Fish Abundance at a Submarine Spring in a Coastal Lagoon on Tahiti, French Polynesia

Enhanced Productivity and Fish Abundance at a Submarine Spring in a Coastal Lagoon on Tahiti, French Polynesia

Seasonal variability of ichthyoneuston assemblage on the continental shelf and slope of the Southwest Atlantic Ocean, Brazil (20°–23°S)

Copépodos epipelágicos en Bahía Cupica, Pacífico colombiano: composición de especies, distribución y variación temporal

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