Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet
- Publication Type:
- Journal Article
- Citation:
- Harmful Algae, 2012, 15 pp. 36 - 46
- Issue Date:
- 2012-03-01
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| Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and.pdf | Accepted Manuscript Version | 1.83 MB |
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An investigation into the distribution of Dinophysis spp. in coastal waters off the south coast of Ireland was carried out in July 2007. Dinophysis acuta was present as a sub surface layer containing up to 55,000cellsL -1. The population had a high percentage of viable cells (mean: 89%; median: 94%; n=24) with a high specific division rate (∼0.55d -1). The layer, of approximately 5m thickness, did not coincide with the fluorescence maximum and was present as a patch of horizontal dimension less than 10km×7km. Both conventional and towed undulating CTD used in conjunction with high vertical resolution sampling methods showed the patch of Dinophysis to move with a similar speed and direction as the coastal flow, which ran parallel to the coast in the form of a coastal jet with speed of the order of 6.5-7kmday -1. The implications of the alongshore transport of populations of harmful species in coastal jets for monitoring programmes and predictive models are discussed. © 2011 Elsevier B.V.
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