Zonation of protistan plankton in a productive area of the Patagonian shelf: Potential implications for the anchovy distribution

Ferronato, Carola; Guinder, Valeria A.; Chidichimo, María Paz; Abbate, M. Celeste López; Amodeo, Martín Raúl

doi:10.1016/j.fooweb.2021.e00211

Cited by 11 publications

(4 citation statements)

References 77 publications

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“…Around 41°S, the middle shelf is affected by water intrusions from the MC (Lucas et al, 2005;Piola et al, 2013), in addition to the diluted subantarctic waters that fuel nutrients into the shelf (Figure 2A). The MC intrusions play a significant role in the development of the Mid Shelf Front (between 37.5 °S and 41°S) during autumn and spring (Romero et al, 2006) through fertilisation and stimulation of phytoplankton outburst (Díaz et al, 2018;Ferronato et al, 2021). Together with the nutrient supply from the MC upwelling, phytoplankton growth in the onshore portion of the PSBF is stimulated by strong vertical stability that maintains the cells in the well-illuminated surface layers (García et al, 2008, Signorini et al, 2006Ferronato et al, 2023).…”

Section: Drivers Of Phytoplankton Blooms In the Psbfmentioning

confidence: 99%

“…Instead, summer blooms of coccolithophores are detected by high calcite (6 to 10 mmol m -3 ) and thus by satellite PIC (Signorini et al, 2006). In the Patagonian Shelf, Gephyrocapsa oceanica is the other common coccolithophore, although it is more abundant inshore (Negri et al, 2003;Guinder et al, 2018;Ferronato et al, 2021;Delgado et al, 2019). The large size coccolithophore Coccolithus pelagicus is also a frequent species in summer in the PSBF, but in considerable lower abundance (0.05 x 10 6 cells L -1 ) than the blooming Emiliania huxleyi (maxima abundances recorded in the PSBF: 11x10 6 cells L -1 at ˜49degS in January 2008, Garcia et al (2011), and 6.3 x 10 6 cells L -1 in January 2019 at ˜39degS, Berghoff et al, 2023).…”

Section: Primary Productivity and Phytoplankton Composition In Spring...mentioning

confidence: 99%

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The phytoplankton of the Patagonian Shelf-Break Front

Guinder¹,

Ferronato²,

Dogliotti³

et al. 2023

Preprint

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Intense phytoplankton blooms in the Patagonian Shelf-Break Front (PSBF) in the southwest Atlantic Ocean (˜35°S-55°S) are responsible for making this large marine ecosystem one of the most productive and rich in resources and biodiversity of the Global Seas. This systematic review presents an up-to-date knowledge of the phytoplankton community composition, biomass and primary productivity along the permanent PSBF from temperate to subpolar latitudes. The interaction between wind stress, shelf waters, the steep slope and western energetic edge currents (i.e. Malvinas and Brazil Currents) originates upwelling areas and phytoplankton outbreaks, with maxima in spring and summer. In a sub-regional scale, the structure of the phytoplankton community is driven by the interplay between the complex geomorphological and hydrographical characteristics across the shelf-to-open ocean transition, also modulated by seasonal changes in light, nutrients and grazing pressure. Hence, different assemblages of phytoplankton functional groups and size-classes are observed along contrasting areas of the PSBF. Phytoplankton blooms have been studied from field observations in oceanographic cruises, satellite imagery and modelling. As a general outcome, blooms of micro-phytoplankton, e.g. large diatoms and dinoflagellates, are responsible for the high chlorophyll levels in austral spring, while blooms of pico-and nanophytoplankton occur in summer, e.g. blooms of calcified and non-calcified haptophytes such as the coccolithophore Emiliania huxleyi and Phaeocystis antarctica.

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Section: Drivers Of Phytoplankton Blooms In the Psbfmentioning

confidence: 99%

Section: Primary Productivity and Phytoplankton Composition In Spring...mentioning

confidence: 99%

The phytoplankton of the Patagonian Shelf-Break Front

Guinder¹,

Ferronato²,

Dogliotti³

et al. 2023

Preprint

View full text Add to dashboard Cite

show abstract

“…The spatial heterogeneity of surface phytoplankton blooms and their governing factors in the Patagonian shelf have been studied mostly from satellite chlorophyll a (Chl a ) estimations and in a lesser extent from in situ measurements, as revised in Guinder et al (2023). Even less studied are the phytoplankton blooms in the transition across the 40°S parallel, a portion of the shelf which embraces the shallow area of El Rincón and the mid‐shelf and shelf‐break fronts, with a particularly complex hydrography (Guinder et al 2018; Ferronato et al 2021). Similarly, phytoplankton taxa composition and vertical distribution in the water column have been poorly studied, leading to an incomplete comprehension of carbon fluxes and trophic efficiency.…”

Section: Figmentioning

confidence: 99%

Wind‐driven currents and water masses shape spring phytoplankton distribution and composition in hydrologically complex, productive shelf waters

Ferronato

Berden

Rivarossa

et al. 2023

Limnology & Oceanography

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The Northern Patagonian shelf (35–42°S SW South Atlantic) is a transitional area between the subtropical and subantarctic domains, where the shelf shifts from source to sink of atmospheric CO2. In the southeast portion (39–42°S, 61–55°W) of this area, winds interact with different water masses and picture a complex circulation that supports two productive frontal systems: the Mid‐Shelf Front (MSF) and the Patagonian Shelf‐break Front. We combined remote sensing (e.g., monthly surface chlorophyll a over the period: September–December 2002–2021), reanalysis (winds and surface currents), and in situ measurements from three cross‐shelf cruises in spring 2016, 2017, and 2019, to assess the underlying drivers of phytoplankton distribution. The anomalous high chlorophyll concentration in the MSF in spring 2016 was related to enhanced water mass retention by N‐NE winds. Contrasting phytoplankton assemblages emerged related to stratified waters in the shelf influenced by the Patagonian Current and vertically mixed waters at the continental edge (Malvinas Current). Large diatoms prevailed in the outer shelf followed by dinoflagellates, while nanoflagellates and microzooplankton dominated in the mid‐shelf. Furthermore, thickness of the subsurface chlorophyll maximum was broader in the early spring than in a more advanced state of the bloom where the coccolithophore Emiliania huxleyi was abundant. We showed that different time‐scale physical processes—winds, surface currents and vertical mixing—are underpinning the development of spring blooms with different taxa composition in the Patagonian shelf, where different water masses define the hydrological complexity that led to patchy phytoplankton.

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“…9. Moreover, in mid-shelf zones rich in biodiversity and fishing resources (Ferronato et al, 2021) and in the extensive Patagonian Shelf-Break Front, PSBF (Martinetto et al, 2019) (Fig. 9), oceanographic cruises including phycotoxins scanning only began in the last decade: 2012-2018.…”

Section: Increased Number Of Records Of Toxic Phytoplankton In the Pa...mentioning

confidence: 99%

Increase in records of toxic phytoplankton and associated toxins in water samples in the Patagonian Shelf (Argentina) over 40 years of field surveys

Ramírez

Guinder²,

Ferronato³

et al. 2022

Harmful Algae

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Zonation of protistan plankton in a productive area of the Patagonian shelf: Potential implications for the anchovy distribution

Cited by 11 publications

References 77 publications

The phytoplankton of the Patagonian Shelf-Break Front

The phytoplankton of the Patagonian Shelf-Break Front

Wind‐driven currents and water masses shape spring phytoplankton distribution and composition in hydrologically complex, productive shelf waters

Increase in records of toxic phytoplankton and associated toxins in water samples in the Patagonian Shelf (Argentina) over 40 years of field surveys

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