Blanchot Jean, Rodier Martine, Le Bouteiller Aubert. (1992). Effect of El Nino southern oscillation events on the distribution and abundance of phytoplankton in the Western Pacific Tropical Ocean along 165°E. Journal of Plankton Research, 14 (1), p. 137-156.
Titre du document
Effect of El Nino southern oscillation events on the distribution and abundance of phytoplankton in the Western Pacific Tropical Ocean along 165°E
Année de publication
1992
Type de document
Article
Auteurs
Blanchot Jean, Rodier Martine, Le Bouteiller Aubert
Source
Journal of Plankton Research, 1992,
14 (1), p. 137-156
The distribution of physical and chemical parameters and their impact on the biomass and abundance of phytoplankton in the Western Pacific ocean were compared in two opposing situations : the El Nino Southern Oscillation (ENSO) event of 1987 and the no-ENSO period of 1988. During El Nino conditions (september 1987), maximum cell abundance was recorded at 10°S at the boundary between the South Equatorial current (SEC) and the South Equatorial countercurrent (SECC). In September 1988, after the return of non-ENSO conditions, a well-established Equatorial upwelling produced an increase in the surface layer nutrient supply over 7° of latitude. This in turn caused an increase in phytoplankton populations in the upper layer, with chlorophyll concentrations ... Integrated over 120 m, the cyanobacteria and microalgae populations were respectively 4.7. and 3.2 times larger than the year before. On the other hand, transient nutrients inputs such as those observed at 10°S in September 1987 caused a large increase in cyanobacteria populations (4.4. times) compared with those in neighbouring zones, and a somewhat smaller increase in microalgae populations (1.3 times)
