An unusual bloom of Gyrodinium cf. aureolum in the Argentine sea: community structure and conditioning factors

NEGRI R.M.; CARRETO, J.I.; BENAVIDES, H.R.; AKSELMAN, R; LUTZ, V.A.

JOURNAL OF PLANKTON RESEARCH

OXFORD UNIV PRESS

Lugar: Oxford; Año: 1992 vol. 14 p. 261 - 269

0142-7873

In October 1988 a bloom of Gyrodinium cf. aureolum was recorded along a transect across the continental shelf reaching cell densities of 1300 ml-1 and chlorophyll a concentrations up to 16 ug l-1. The bloom was restricted to a nutrient-rich thin surface layer of approx. 10 m depth at the beginning of seasonal pycnocline. Hydrological conditions showed a particular salinity distribution.The phytoplankton community was dominated by G. cf. aureolum but the coexisting flora presented a great diversity. UV-absorbing pigments were recorded in the community.