The life cycle of Phaeocystis (Prymnesiophycaea): evidence and hypotheses

Rousseau, Véronique; Vaulot, Daniel; Casotti, Raffaella; Cariou, Valérie; Lenz, Jürgen; Gunkel, Judith; Baumann, Marcus

doi:10.1016/0924-7963(94)90014-0

Cited by 168 publications

(119 citation statements)

References 33 publications

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“…About half of our observations indicate that the matrices of Phaeocystis are colonized, probably by heterotrophic nanocells, as suggested for North Sea Phaeocystis [Rousseau et al, 1994], and larger free-living microheterotrophs, dinoflagellates, and ciliates are commonly encountered. In our samples, peaks of dinoflagellate and ciliate numbers coincide in surface waters and appear to be associated with maximum phytoplankton cell numbers (Figures 4a and 4b).…”

Section: Carbon Biomass Of Coccolithophorids and Diatoms Increasedmentioning

confidence: 83%

Phytoplankton and microzooplankton variability between the Subtropical and Polar Fronts south of Australia: Thriving under regenerative and new production in late summer

Kopczyńska¹,

Dehairs²,

Elskens³

et al. 2001

J. Geophys. Res.

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Production related parameters (e.g., lowf ratio and high NH4 + uptake) point to the presence of regenerative community at the STF. It attracted the highest concentration of microzooplankton. The phytoplankton community associated with a frontal feature (46ø-47øS) within the SAZ, thrived under increased new production (e.g., relatively higherf ratio and NO3-uptake). The community along 47ø-55øS was characterized by intermediatef ratios, with slight predominance of regenerated production. Southward of 47øS, the relative contribution of new production increased.

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Section: Carbon Biomass Of Coccolithophorids and Diatoms Increasedmentioning

confidence: 83%

Phytoplankton and microzooplankton variability between the Subtropical and Polar Fronts south of Australia: Thriving under regenerative and new production in late summer

Kopczyńska¹,

Dehairs²,

Elskens³

et al. 2001

J. Geophys. Res.

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“…The life cycle of Phaeocystis includes solitary flagellated cells 3-8 p,rn in diameter, as well as colonial aggregations of hundreds of nonflagellated cells embedded in gelatinous matrices of up to 2-mm diameter (Rousseau et al 1994). Gelatinous Phaeocystis colonies can form enormous nuisance blooms contributing to anoxia, beach fouling, and clogging of bivalve gills and fishing nets (Lancelot et al 1987, WeiBe et al 1994.…”

Section: Pjesteria Toxin Neurotoxicitymentioning

confidence: 99%

Toxic marine phytoplankton, zooplankton grazers, and pelagic food webs

Turner

Tester

1997

Limnology & Oceanography

380

265

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Interactions between toxic phytoplankton and their zooplankton grazers are complex. Some zooplanktcrs ingest some toxic phytoplankters with no apparent harm, whereas others are deleteriously affected. Phycotoxins vary in their modes of action, levels of toxicity and solubility, and affect grazers in different ways. Beyond effects on direct grazers, toxins may accumulate in and be transfcrrcd through marine food webs, affecting consumers at higher trophic levels, including fish, scabirds, and marine mammals. Grazers of toxic phytoplankton include protists as well as metazoans, and the impact of zooplankton grazing on development or termination of toxic blooms is poorly understood. In most interactions of toxic phytoplankters with grazers and other marine food-web components, outcomes are situation-specific, and extrapolation of results from one set of circumstances to another may be inappropriate.

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“…In the eastern English Channel, P. globosa blooms typically follow and precede two distinct diatom assemblages and abruptly collapse at the end of spring (Breton et al, 2000;Seuront et al, 2006). In the Southern Bight of the North Sea, where the phytoplankton spring bloom is also dominated by P. globosa (Lancelot et al, 1994;Rousseau et al, 1994;Lancelot, 1998), similar spring phytoplankton community successions have been observed (Gieskes & Kraay, 1975;Cadée & Hegeman, 1986;Rousseau et al, 2002;Stelfox-Widdicombe et al, 2004). Phytoplankton seasonal production and its relation to nutrient cycles have previously been investigated in the eastern English Channel (Brunet et al, 1992Gentilhomme & Lizon, 1998;Breton et al, 2000;Seuront et al, 2006).…”

Section: Introductionmentioning

confidence: 99%

Temporal patterns of phytoplankton assemblages, size spectra and diversity during the wane of aPhaeocystis globosaspring bloom in hydrologically contrasted coastal waters

et al. 2008

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The space-time dynamic of phytoplankton diversity and succession was investigated during the wane of a Phaeocystis globosa spring bloom in four distinct hydrological sub-systems of the eastern English Channel. Nutrients, chlorophyll-a concentrations, and phytoplankton composition, standing stocks, size spectra and diversity were monitored during three key periods in 2003: late spring, early summer and summer. Two consecutive diatom assemblages were observed, respectively dominated by: (i) small colonial species (,100 mm; Melosira sp., Diploneis sp. and Navicula transitans) in April; and (ii) large fine-walled cells (.200 mm; Guinardia striata and Rhizosolenia imbricata) in May and July. This shift in diatom composition appeared to be related to the potentially limitating silicic acid in early summer. Specific phytoplankton assemblages identified in distinct water masses have evolved from a mature/senescent community towards a relatively homogeneous aestival structure of dominant species that might have been triggered by the wane of the P. globosa bloom. Our results also identified a strong heterogeneity in the distribution of secondary species between distinct water masses during the summer period, suggesting that the magnitude of the observed patterns was intrinsically related to the hydrological properties prevailing in each sub-system. The identification of distinct temporal patterns in phytoplankton species diversity and succession following the wane of a spring bloom at relatively small spatial scales (i.e. ,10 km) is discussed in the framework of P. globosa blooms in particular and phytoplankton blooms in general and is suggested to have potentially strong consequences on food web dynamics and the carbon cycle in coastal ecosystems.

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The life cycle of Phaeocystis (Prymnesiophycaea): evidence and hypotheses

Cited by 168 publications

References 33 publications

Phytoplankton and microzooplankton variability between the Subtropical and Polar Fronts south of Australia: Thriving under regenerative and new production in late summer

Phytoplankton and microzooplankton variability between the Subtropical and Polar Fronts south of Australia: Thriving under regenerative and new production in late summer

Toxic marine phytoplankton, zooplankton grazers, and pelagic food webs

Temporal patterns of phytoplankton assemblages, size spectra and diversity during the wane of aPhaeocystis globosaspring bloom in hydrologically contrasted coastal waters

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