By Jean-Pierre Debenay
Numbering approximately 10000 species, Foraminifera represent the main diversified crew of shelled microorganisms within the ocean. also they are probably the most helpful instruments for environmental evaluate and tracking courses. This advisor through Jean-Pierre Debenay offers an outline of the environmental stipulations round New Caledonia, an obtainable creation to Foraminifera, and a precis of the learn that has been conducted from the island kingdom. It additionally describes multiple thousand species of Foraminifera accumulated round New Caledonia, accompanying each one access with SEM micrographs and notes on its distribution. equipped into teams to make it effortless to spot every one species, will probably be a realistic reference.
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Additional resources for A guide to 1,000 foraminifera from southwestern Pacific : New Caledonia
For graphing the distribution of species with these two parameters, samples were grouped into classes with a class interval of 5 m for depth, and of 5% for grain size. The frequency of each species (% of samples where the species is represented) was calculated for each class of samples. 34 | A Guide to 1,000 Foraminifera from Southwestern Pacific: New Caledonia Bay of Saint Vincent Bay of Saint Vincent Bay of Saint Vincent Présent Présent Nouméa Présent Nouméa Prony Nouméa Prony Prony Coral Sea Coral Sea Coral Sea Bay of Saint Vincent Bay of Saint Vincent Bay of Saint Vincent Présent Présent Nouméa Présent Nouméa Prony Coral Sea Nouméa Prony Coral Sea Prony Coral Sea | Figure 31 Species widely distributed, but mostly connected to the SE open area and to passes.
Sediment samples were collected weekly at ten stations during a whole growing cycle. , 2009b). The pioneering species are Ammonia tepida (dominant species) and Quinqueloculina seminula, which appeared a few days after the initial filing and increased during the first 10 weeks, due to their high reproduction rates. Their populations then stabilized due to drop of redox and consumption by shrimp. Only a few colonizers subsequently appeared despite the high rate of water renewal, which was attributed to the isolation of the pond.
Comparison between their distribution areas, elongated and curved to the NW, and the water circulation described by ROUGERIE (1986) suggests that they are distributed along the trajectory of subsuperficial oceanic water penetrating the lagoon through passes (fig. 39). The distribution patterns of foraminifera illustrate the double water circulation prevailing in the lagoon (ROUGERIE, 1986). Planktonic foraminifera, living in the open sea, are transported into the lagoon by superficial water masses pushed toward the NW, through the scattered SE reefs, by the SE dominant trade winds.
A guide to 1,000 foraminifera from southwestern Pacific : New Caledonia by Jean-Pierre Debenay