Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1424 résultats pour les termes de recherche: changement climatique

Affichage des résultats: 521 à 530

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Sustainability of exploited marine ecosystems through protected areas: A viability model and a coral reef case study

Overexploitation of marine resources remains a problem worldwide. Many works advocate for the use of marine reserves as a central element of future stock management in a sustainable perspective. In the present paper, we address the influence of prote...

Effects of short-term environmental disturbances on living benthic foraminifera during the Pacific oyster summer mortality in the Marennes-Oléron Bay...

Sediment cores were collected from April to August 2004 on tidal mudflats of the macrotidal Marennes-Oléron Bay (SW France), famous for the cultivation of Pacific oysters (Crassostrea gigas). The response of living (stained) benthic foraminifera to ...

Earliest Eocene (53 Ma) convergence in the Southwest Pacific; evidence from pre-obduction dikes in the ophiolite of New Caledonia.

Uncertainty about timing and location of the initiation of convergence in the western and south western Pacific greatly hinders accurate plate tectonic reconstructions of subduction systems in that area. The chemistry and age of dikes intruding mantl...

Comparative ichthyotoxicity of shallow and deep water sponges of New Caledonia;Proceedings of the sixth international coral reef symposium

A survey of comparative ichthyotoxicity in marine sponges from shallow and deep water in the Southern province of New Caledonia was conducted. Test fish #Gambusia affinis$ (#Vertebrata, Pisces$) were exposed to aqueous macerates of 30 shallow water a...

Reproductive biology of the holothurians from major communities of the New Caledonian lagoon

The reproductive biology of nine species of aspidochirote holothurians from the majour communities of the New Caledonian lagoon has been analysed. The data were obtained from monthly sampling from 1978 to 1982 of their populations on reef slopes and ...

Etude sedimentologique des milieux de mangrove du Benin occidental (Afrique de l'Ouest)

The littoral area of Benin is a lagoonal-estuarial, indeed even deltaic, environment. Poor in species, the mangrove of Benin belongs to the tropical Atlantic type tending to be humid, considering the "drought belt" which affects this region. It under...

Evolution geochimique et exemple d'amenagement des mangroves au Senegal (Casamance)

The mangroves of Senegal are limited to the inlet of the Casamance - a river with very low discharge - and to the Sine-Saloum. The mineralogical and geochemical analysis of sediments (derived from 30 deep bore-holes) shows the thickness of the mangro...

Passive Margin Development. A Consequence of Specific Convection Patterns in a Variable Viscosity Upper Mantle

Simple thermodynamics calculations are applied to processes of a rising plume within an environment of an upward directed gradient of viscosity in the uppermost mantle. Four stages of the development of passive margins are described. Following an ini...

Espaces de vie et conscience politique : le cas des Mélanésiens de Nouvelle-Calédonie;Le voyage inachevé... à Joël Bonnemaison

For a long time, recovering the land of their fathers (under colonial control) has been the main target for the Melanesian community in New Caledonia. After 1985, the objective has been changing to recovering sovereignty. But every day, the unbalance...

Foraminifera in the diet of coral reef fish from the lagoon of New Caledonia : predation, digestion, dispersion

Les foraminifères benthiques marins sont abondants et représentent une source de nourriture potentielle pour les poissons. Les études précédentes des foraminifères dans le régime alimentaire des poissons se sont appuyées sur de petits nombres...