Jean-Pierre Debenay's A guide to 1,000 foraminifera from southwestern Pacific : PDF

By Jean-Pierre Debenay

ISBN-10: 2709917297

ISBN-13: 9782709917292

ISBN-10: 2856536980

ISBN-13: 9782856536988

Numbering approximately 10000 species, Foraminifera represent the main assorted workforce of shelled microorganisms within the ocean. also they are essentially the most invaluable instruments for environmental overview and tracking courses. This consultant by means of Jean-Pierre Debenay offers an outline of the environmental stipulations round New Caledonia, an available advent to Foraminifera, and a precis of the examine that has been conducted from the island kingdom. It additionally describes a couple of thousand species of Foraminifera accrued round New Caledonia, accompanying every one access with SEM micrographs and notes on its distribution. prepared into teams to make it effortless to spot each one species, will probably be a pragmatic reference.

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Extra resources for A guide to 1,000 foraminifera from southwestern Pacific : New Caledonia

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40 left). The distribution of the test, west and east of the entrance of the bay can be explained by the strong alternating tidal currents through Woodin channel and along the southern coast of Grande Terre. The presence of tests on the deeper southern shelf, to the south, suggests a gravity-driven sediment transport on the southern shelf, down to deeper low energy areas. The last area of test deposition, along the south-east coast of Ouen Island, indicates a southward longshore transport. The distribution of silt and clay is consistent with the sediment transport direction deduced from the distribution of O.

Conversely, Q. , 2009a). The most remarkable feature was the proportion of abnormal foraminiferal tests collected in the shrimp ponds of New Caledonia (fig. 45). , 2009b). Previous studies that also reported high rates of test abnormalities sometimes suggest the role of organic matter as responsible A Guide to 1,000 Foraminifera from Southwestern Pacific: New Caledonia 1 2 4 3 5 6 7 | 43 for increased abnormalities. In this study, it appeared that the nature of organic matter rather than its quantity acts on test abnormalities.

Sediment feeders, which accidentally ingest great quantities of empty tests (up to 4,000 in a fish gut), have no impact on the foraminiferal population, but play a prominent role in the dispersion of empty tests. They may introduce significant changes in the thanatocoenoses, potentially introducing some bias in paleoenvironmental interpretations. Incidental predators of living foraminifera are either herbivorous, which do not digest the foraminifera or carnivorous, which ingest and digest insignificant foraminiferal biomass.

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A guide to 1,000 foraminifera from southwestern Pacific : New Caledonia by Jean-Pierre Debenay

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