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| Tillmann, Urban; Gottschling, Marc; Nezan, Elisabeth; Krock, Bernd; Bilien, Gwenael. |
| Some species of the planktonic dinoflagellate genus Azadinium produce azaspiracids (AZAs), a group of lipophilic phycotoxins causing human poisoning after mussel consumption. We describe three new species from the North Atlantic, all of which shared the same Kofoidean plate pattern characteristic for Azadinium: Po, cp, X, 4′, 3a, 6′́, 6 C, 5S, 6′́́, 2′́́́. Azadinium trinitatum sp. nov. was mainly characterized by the presence of an antapical spine and by the position of the ventral pore at the left distal end of the pore plate in a cavity of Plate 1′ Plate 1. Azadinium cuneatum sp. nov. had a conspicuously formed first apical plate, which was asymmetrically elongated and tapered on its left lateral side with a ventral pore located at the tip of this... |
| Tipo: Text |
Palavras-chave: Azadinium; Azaspiracids; Irminger Sea; Iceland; New species. |
| Ano: 2014 |
URL: http://archimer.ifremer.fr/doc/00188/29917/28382.pdf |
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| Piron, Anne; Thierry, Virginie; Mercier, Herle; Caniaux, Guy. |
| Analysis of Argo data obtained during winter 2011–2012 revealed the presence over the Irminger Basin of an exceptionally large number of profiles (41) with mixed layer depths (MLD) exceeding 700 m, which was deep enough to reach the pool of the intermediate Labrador Sea Water located in the Irminger Sea. Four of these profiles exhibited an MLD of 1000 m, which was the maximum value observed for the winter in question. The Argo sampling in the Irminger Sea during that winter, which was 3 to 4 times greater than for the preceding winters, enabled the different phases of the mixed layer deepening down to 1000 m, together with their spatial extents, to be observed for the first time. Two intense convective periods occurred: in late January south of Cape... |
| Tipo: Text |
Palavras-chave: Deep convection; Irminger Sea; Argo data; Greenland Tip Jet; Mixed layer dynamics; Air-sea interactions. |
| Ano: 2016 |
URL: https://archimer.ifremer.fr/doc/00309/42059/41354.pdf |
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| Tillmann, Urban; Gottschling, Marc; Nézan, Elisabeth; Krock, Bernd. |
| Species of dinophycean Amphidomataceae are producers of phycotoxins classified as azaspiracids. We provide the first records of two of their constituent species, Amphidoma languida and Azadinium dexteroporum, for the Irminger Sea off Iceland. Morphological examination and molecular characterization, including uncorrected mean pairwise distances between sequences of the Internal Transcribed Spacer (ITS), doubtlessly assigned the sub-Arctic strain 2A11 to the reference of Amphidoma languida. Strain 2A11 produced AZA-38 and AZA-39, corresponding to the toxin profile described for the type material. The sub-Arctic isolate 1D12 differed significantly in terms of ITS genetic distance (p = 0.04) from a Mediterranean Azadinium dexteroporum strain, but our... |
| Tipo: Text |
Palavras-chave: Azadinium; Amphidoma; Azaspiracids; Irminger Sea. |
| Ano: 2015 |
URL: https://archimer.ifremer.fr/doc/00667/77913/80095.pdf |
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