Scales characterising a high density thin layer of Dinophysis acuta Ehrenberg and its transport within a coastal jet
|Author(s)||Farrell Hazel1, Gentien Patrick2, Fernand Liam3, Lunven Michel2, Reguera Beatriz4, Gonzalez-Gil Sonsoles4, Raine Robin1|
|Affiliation(s)||1 : Natl Univ Ireland, Ryan Inst Environm Marine & Energy Res, Galway, Ireland.
2 : IFREMER, Ctr Brest, F-29280 Plouzane, France.
3 : CEFAS, Ctr Environm Fisheries & Aquaculture Sci, Lowestoft NR33 0HT, Suffolk, England.
4 : Ctr Oceanograf Vigo, IEO, Vigo 36390, Spain.
|Source||Harmful Algae (1568-9883) (Elsevier Science Bv), 2012-03 , Vol. 15 , P. 36-46|
|WOS© Times Cited||33|
|Keyword(s)||Coastal jets, Dinophysis, Ireland, Transport|
|Abstract||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 L-1. The population had a high percentage of viable cells (mean: 89%; median: 94%; n = 24)
with a high specific division rate (~0.55 d-1). 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 x 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 6.5–7 km day-1. The implications of the alongshore transport of populations of harmful species in coastal jets for monitoring programmes and predictive models are discussed.