Nutrients and plankton spatial distributions induced by a coastal eddy in the Gulf of Lion. Insights from a numerical model

Campbell, Rose; Diaz, Frédéric; Hu, Zheng; Doglioli, Andrea M.; Petrenko, Anne; Dekeyser, I.

doi:10.1016/j.pocean.2012.09.005

Cited by 27 publications

(24 citation statements)

References 117 publications

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“…There have been other reports of similar scenarios, where the enhancement at the ACE's edge was obliterated at the center. These scenarios have been associated with ACEs that originate from the coast or shelf (Campbell et al, ; Jeffrey & Hallegraeff, ; Kim et al, ; Moore et al, ). The scenarios at the edges of ACEs that have been generated in typical oligotrophic oceanic environments have been similar to our results to some extent, no matter whether the eddies were in a dipole‐ or single‐ACE mode (Guidi et al, ; José et al, ).…”

Section: Discussionmentioning

confidence: 99%

Anticyclonic Eddy Edge Effects on Phytoplankton Communities and Particle Export in the Northern South China Sea

et al. 2018

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We examined response of phytoplankton total chlorophyll a (TChl a) and community composition to three coherent anticyclonic eddies (ACEs) observed during a cruise to the northern South China Sea on 28 July to 7 August 2007. Photosynthetic pigments were measured to estimate the contribution of nine phytoplankton groups to TChl a. Although the water column‐integrated TChl a inventory in the upper 100 m was very similar among the three ACEs (17.6–18.9 mg/m2) we observed during the cruise, there were remarkable enhancements in biomasses at the eddy edges. TChl a inventory was 20.8 ± 3.0 mg/m2 at the edge, which was 33% or 60% higher than at the center and reference. The greatest enhancement of the TChl a at edge was attributed to haptophyte‐8, which was 1.6 and 2.2 times the analogous concentrations at the center and reference sites. The Prochlorococcus Chl a was ~50% greater at the edge relative to the reference and was intermediate at the center. Diatom Chl a at the edge was ~2.5 times the concentrations at the center and reference sites. The positive correlation between particulate organic carbon flux and haptophyte‐8 Chl a at the edge implied an important role of haptophyte‐8 in particle export productivity. It is interesting to note that there occurred higher fluxes of biogenic Si at the center of the ACEs due likely to lateral transport of diatoms from the edge. The phenomenon of higher TChl a at the edge but higher export at the center may have been the combined result of vertical convection and lateral transport within the eddies.

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Section: Discussionmentioning

confidence: 99%

Anticyclonic Eddy Edge Effects on Phytoplankton Communities and Particle Export in the Northern South China Sea

et al. 2018

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“…In the GoL, ocean color studies using remote sensors (e.g., CZCS, MERIS) have revealed strong spatial variation in the distribution of chlorophyll [92]–[94]. In this area, the coastal eddies transport organic matter from the coastal zone to the offshore domain [95]. This effect may be the reason that the coastal waters off Languedoc-Roussillon, influenced hydrographically by lagoons and shallow waters, were identified as occasional hotspots for anchovy reproduction.…”

Section: Discussionmentioning

confidence: 99%

Modeling Fish Egg Production and Spatial Distribution from Acoustic Data: A Step Forward into the Analysis of Recruitment

et al. 2013

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To date, there are numerous transport simulation studies demonstrating the relevance of the hydrodynamics for the advection, dispersion and recruitment of early stages of marine organisms. However, the lack of data has conditioned the use of realistic locations for the model setup and configuration in transport studies. This work (I) demonstrates the key role played by the use of the realistic initial position of the eggs of small pelagic fishes in the analysis of late-larval recruitment in coastal nursery areas and (II) provides a general solution for deriving future egg positions and abundances from adult biomass obtained from acoustic surveys and available fecundity data. Using European anchovy in the NW Mediterranean as a case study, we first analyzed the impact of the initial location, timing, egg buoyancy and diel vertical migration of larvae on the potential late-larval recruitment to coastal areas. The results suggested that prior knowledge of the initial spawning grounds may substantially affect the estimates of potential recruitment. We then integrated biological and acoustics-derived data (the biomass and size structure, sex ratio, a weight-batch fecundity model, mean weight, number of fish and mean spawning) to build a predictive model for interannual egg production. This model was satisfactorily contrasted with field data for two years obtained with the Daily Egg Production Method (DEPM). We discuss our results in the context of the fluctuations of European anchovy egg abundance from 2003 through 2010 in the NW Mediterranean and in terms of the potential applicability of the acoustics-based spatial predictive egg production model.

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“…The observed discrepancy between the simulated and observed anticyclonic eddy (such as the timing and exact location) is expected for our study site, as these eddies are generated by instabilities and random perturbations whose precise locations are inherently difficult to predict. Similar modeling performance has been reported in numerical studies on other coastal regions, where simulated eddy fields showed some general resemblance with the observations even though they did not precisely capture the detailed timing and location [e.g., Campbell et al ., ; Combes et al ., ; Gan et al ., ]. Regardless, the important role of an anticyclonic eddy in suppressing or promoting nutrient delivery during upwelling events should be realistic and a process that frequently occurs along this coast.…”

Section: Discussionmentioning

confidence: 99%

“…Previous work on other EBCS has already shown a diverse range of biological responses when eddies begin to interact with wind‐induced coastal upwelling. In some cases, the eddy‐induced upwelling can augment the wind‐driven upwelling and, in turn, enhance nutrient supply to the coastal surface layer [ Campbell et al ., ; Gaube et al ., ]. For instance, Li et al .…”

Section: Introductionmentioning

confidence: 99%

The combined effect of transient wind‐driven upwelling and eddies on vertical nutrient fluxes and phytoplankton dynamics along Ningaloo Reef, Western Australia

et al. 2016

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We investigate the influence of wind stresses, stratification, and coastal mesoscale eddies on upwelling intensity, vertical nutrient fluxes, and phytoplankton biomass on the continental shelf off Ningaloo Reef in northwestern Australia during an austral spring‐summer period. A three‐dimensional (3‐D) hydrodynamic model, ROMS (Regional Ocean Modeling System), was coupled with a four‐component nitrogen‐based biogeochemical NPZD model (Nitrogen Phytoplankton Zooplankton Detritus) to resolve the shelf circulation as well as the coupled nutrient and phytoplankton dynamics within a broad shelf region surrounding Ningaloo Reef. The simulated currents, temperatures, and chlorophyll a concentrations generally agreed well with both the remotely sensed satellite images and observational data collected during a field experiment from September to November 2010. Scenario tests for an individual wind‐driven upwelling event under a variety of hypothetical physical forcing conditions showed that shelf currents and biogeochemical variables were largely a function of wind stress and stratification. However, the functional relationships derived from this single wind event could not be extrapolated to other periods of the upwelling season, due to the additional influence of 3‐D mesoscale processes on the shelf. The presence, intensification, and propagation of a coastal anticyclonic eddy during the study period strongly influenced the spatial and temporal variations in nutrient profiles, which in turn caused fluctuations in vertical nutrient fluxes that were largely independent of wind stress. These results emphasize that it is necessary to fully capture the 3‐D details of the mesoscale and submesoscale coastal dynamics to properly predict upwelling‐induced coastal phytoplankton dynamics in eddy‐intensive shelf regions such as Ningaloo Reef.

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Nutrients and plankton spatial distributions induced by a coastal eddy in the Gulf of Lion. Insights from a numerical model

Cited by 27 publications

References 117 publications

Anticyclonic Eddy Edge Effects on Phytoplankton Communities and Particle Export in the Northern South China Sea

Anticyclonic Eddy Edge Effects on Phytoplankton Communities and Particle Export in the Northern South China Sea

Modeling Fish Egg Production and Spatial Distribution from Acoustic Data: A Step Forward into the Analysis of Recruitment

The combined effect of transient wind‐driven upwelling and eddies on vertical nutrient fluxes and phytoplankton dynamics along Ningaloo Reef, Western Australia

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