Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet
- Elsevier Science Bv
- Publication Type:
- Journal article
- Farrell, Hazel et al. 2012, 'Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet', Harmful Algae, vol. 15, pp. 36-46.
- Issue Date:
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 55,000 cells. The population had a high percentage of viable cells (mean: 89%; median: 94%; n = 24) with a high specific division rate ( 0.55). The layer, of approximately 5 m thickness, did not coincide with the fluorescence maximum and was present as a patch of horizontal dimension less than 10 km 7 km. 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 6.57 km day1 . The implications of the alongshore transport of populations of harmful species in coastal jets for monitoring programmes and predictive models are discussed.
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