BULA 4
| Type | Oceanographic cruise |
|---|---|
| Set | This cruise is part of the set BULA |
| Ship | Alis |
| Ship owner | IRD |
| Dates | 30/08/2003 - 08/09/2003 |
| Chief scientist(s) | PRINGAULT Olivier |
INSTITUT MÉDITERRANÉEN D'OCÉANOLOGIE - UMR 7294 UMR IRD 235 - MARSEILLE 163 avenue de Luminy Bâtiment Méditerranée 13288 Marseille Cedex 9 +33(0)4 86 09 05 00 |
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| DOI | 10.17600/3100110 |
| Objective | Mission to characterize the environment in the lagoon surrounding the town of Suva in the cool season. Characterization of physical chemical distribution in the lagoon's waters. Determining the distribution of bacterial production. Determining the distribution of phytoplankton primary production under constant light. Determining the impact of metallic inputs on zooplankton communities. Comments on the cruise's progression: CTD profiles and water samples were taken at a set of 59 stations for: - analysis of physical-chemical characteristics (dissolved and particulate nutrients, chloropigments), - measurements of primary production and bacterial production. Additional sampling was done at 15 out of the 59 stations in all, to collect zooplankton: S05, S06, S09, S10, S13, S25, S27, S28, S29, S30, S36, S39, S48, S53, S54. Stations S46, S47 and S49 could not be sampled because the Fiji island authorities refused us access to them. The Noumea-Suva and Suva-Noumea transits were taken advantage of for water sampling, phytoplankton collection and CTD profiles at 16 stations (8 on the way out and 8 on the return trip). The objective was to study cyanobacteria (particularly Trichodesmium) in relation with environmental parameters like nutrients and iron(Martine RODIER). The return transit from Suva-Noumea was taken advantage of to study the distribution of radionuclides (210Pb/210Po, 234Th/238U) in particulate matter, zooplankton and fecal pellets from zooplankton, in order to specify the respective importance of geochemical and biological pathways of particulate transfer(Ron SZYMCZAK). |
