Dynamics of Pseudo-nitzschia spp. and domoic acid production in a macrotidal ecosystem of the Eastern English Channel (Normandy, France)

Klein, Cécile; Claquin, Pascal; Bouchart, Valérie; Roy, Bertrand Le; Véron, Benoı̂t

doi:10.1016/j.hal.2009.10.004

Cited by 59 publications

(52 citation statements)

References 46 publications

(64 reference statements)

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“…It has only been reported infrequently from different locations globally, e.g. the English Channel (Klein et al 2010), Scotland (Bresnan et al 2002;Fehling et al 2006), Bay of Fundy (Kaczmarska et al 2005), from the Japan and Okhotsk Seas (Orlova and Shevchenko 2002) and also from Australian waters (Hallegraeff 1994) and Denmark (Lundholm et al 2010). It is sometimes observed on the setae of Chaetoceros cells (Horner 2002).…”

Section: Discussionmentioning

confidence: 99%

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Diversity and seasonality of Pseudo-nitzschia (Peragallo) at two North Sea time-series monitoring sites

et al. 2015

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Species within the diatom genus Pseudo-nitzschia (Peragallo) have been identified as producers of domoic acid, the toxin responsible for amnesic shellfish poisoning. Toxin-and non-toxin-producing species of Pseudo-nitzschia have been reported globally; however, as Pseudo-nitzschia species cannot be routinely identified to species level using light microscopy, cells are rarely recorded to species level during long-term monitoring studies. Here, we report the results of a comparative survey of Pseudo-nitzschia species at two monitoring sites in the North Sea: Stonehaven on the east coast of Scotland and Helgoland Roads in the German Bight. A difference in the seasonality of this genus was observed between the sites with Pseudo-nitzschia cells playing a major role in the spring bloom as well at the summer and autumn diatom community at Stonehaven. In contrast, Pseudo-nitzschia was abundant only during the summer months at Helgoland. Pseudo-nitzschia cells constitute a higher proportion of the diatom community at Stonehaven than at Helgoland, particularly during the late summer, autumn and winter and thus may be considered more 'ecologically important' at this site. A total of eight different species were recorded during this survey with five Pseudo-nitzschia species observed at the Helgoland site: P. pungens, P. fraudulenta, P. americana, P. cf. delicatissima and the potentially toxic species P. multiseries. Six species were also recorded at Stonehaven; P. australis, P cf. delicatissima, P. pungens, P. cf. pseudodelicatissima, P. subpacifica and P. seriata. This study represents the first examination of the seasonality of Pseudo-nitzschia species around Helgoland and the first comparison between two long-term monitoring sites in the North Sea. P. americana and P. multiseries are also recorded at the Helgoland Roads time-series site for the first time.

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Section: Discussionmentioning

confidence: 99%

“…seriata' group ([3 lm diameter) as identified by light microscopy (DownesTettmar et al 2013). TEM of Pseudo-nitzschia in the eastern English Channel associated DA in the water column with the presence of P. australis (Klein et al 2010).…”

Section: Introductionmentioning

confidence: 96%

Diversity and seasonality of Pseudo-nitzschia (Peragallo) at two North Sea time-series monitoring sites

et al. 2015

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“…This difference of contamination between spring and autumn could be explained by both the difference in environmental conditions during spring and autumn periods and the differences in Pseudo-nitzschia species composing blooms. The production of DA is dependent on the concentration of nutrients (PAN et al 1996, KLEIN et al 2010). …”

Section: Discussionmentioning

confidence: 99%

Pseudo-nitzschia Peragallo (Bacillariophyceae) diversity and domoic acid accumulation in tuberculate cockles and sweet clams in M’diq Bay, Morocco

Leblad¹,

Lundholm²,

Goux³

et al. 2013

Acta Botanica Croatica

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-The diversity of Pseudo-nitzschia (Bacillariophyceae) and accumulation of the neurotoxin domoic acid (DA) in two types of shellfish; tuberculate cockles (Acanthocardia tuberculata) and sweet clams (Challista chione) was explored in M'diq Bay, Morocco during 2007. The highest abundances of Pseudo-nitzschia were found during the period from March to October, with peaks occurring in May and September. Toxin analysis showed an accumulation of domoic acid in shellfish sampled during spring and autumn. The maximum toxin concentration was 4.9 mg DA g -1 of the whole tissue recorded in sweet clam during spring. Using transmission electron microscopy, thirteen Pseudo-nitzschia species were identified, eight of which are known as producers of domoic acid: P. multistriata, P. cuspidata, P. galaxiae, P. multiseries, P. pseudodelicatissima, P. pungens var. aveirensis, P. calliantha and P. fraudulenta. The five non-toxic species observed were P. subpacifica, P. arenysensis, P. dolorosa, P. subfraudulenta, and P. cf. caciantha.

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“…DA has especially impacted scallop fisheries in European waters (EFSA, 2009), and accumulation and prolonged retention of DA has resulted in closures of harvesting in e.g. UK, Ireland (Bogan et al, 2007a,b), France (Né zan et al, 2006;Klein et al, 2010), Denmark (Lundholm et al, 2005a), Portugal (Vale and Sampayo, 2001) and Spain (Aré valo et al, 1998;Fraga et al, 1998) (Table 2; James et al, 2005). On average, 59% of scallops tested contained DA above the EU regulatory limit (EFSA, 2009).…”

Section: Europementioning

confidence: 99%

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

et al. 2012

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Dynamics of Pseudo-nitzschia spp. and domoic acid production in a macrotidal ecosystem of the Eastern English Channel (Normandy, France)

Cited by 59 publications

References 46 publications

Diversity and seasonality of Pseudo-nitzschia (Peragallo) at two North Sea time-series monitoring sites

Diversity and seasonality of Pseudo-nitzschia (Peragallo) at two North Sea time-series monitoring sites

Pseudo-nitzschia Peragallo (Bacillariophyceae) diversity and domoic acid accumulation in tuberculate cockles and sweet clams in M’diq Bay, Morocco

Pseudo-nitzschia physiological ecology, phylogeny, toxicity, monitoring and impacts on ecosystem health

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