Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1379 résultats pour les termes de recherche: taux d'accumulation de particules

Affichage des résultats: 341 à 350

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Suivi annuel de la qualité biologique des eaux de surface du site de Vale NC. Année 2010

Le présent document constitue le rapport annuel de suivi de la qualité biologique au travers de l'étude du benthos, des eaux de surface du site de Vale NC pour l'année 2010. Il intègre également les résultats des études initiées en 2009 et p...

Evolution des paysages en province Sud - Annexe 1 croisements statistiques

Il s'agit de l'annexe 1 de l'étude commanditée par l'OEIL au GIE Océanide. Une étude globale à l'échelle de la province Sud a été réalisée. Elle se décline ensuite à l'échelle communale. L'idée est de dresser un état des lieu des commu...

Concentration en métaux dans les organismes transplantés

Certains organismes marins accumulent les métaux. Mesurer la concentration en métaux dans ces organismes est donc particulièrement intéressant. En effet, en la mesurant, on obtient une bonne image de l'évolution de la concentration en métaux d...

Evidence of nickel (Ni) efflux in Ni-tolerant ectomycorhizal Pisolithus albus isolated from ultramafic soil

Nickel (Ni)-tolerant ectomycorrhizal Pisolithus albus was isolated from extreme ultramafic soils that are naturally rich in heavy metals. This study aimed to identify the specific molecular mechanisms associated with the response of P. albus to nicke...

Discovery of Early Cretaceous rocks in New Caledonia; new geochemical and U-Pb zircon age constraints on the transition from subduction to marginal br...

New U-Pb dating of detrital zircon and geochemical features of Permian-Mesozoic arc-derived volcanic rocks and volcaniclastic turbidites (greywackes), when compared to the volcanic rocks associated with unconformable Late Cretaceous shallow-water sed...

Mechanisms of Trichodesmium demise within the New Caledonian lagoon during the VAHINE mesocosm experiment

The globally important marine diazotrophic cyanobacterium Trichodesmium is abundant in the New Caledonian lagoon (southwestern Pacific Ocean) during austral spring/summer. We investigated the cellular processes mediating Trichodesmium mortality from ...

Waterborne nickel bioaccumulation in Gammarus pulex: Comparison of mechanistic models and influence of water cationic composition

The biodynamic and saturation models offer promising lines of enquiry to predict the bioaccumulation of metals by aquatic organisms. However, in order to construct these models, the accumulation strategies have to be defined for each metal/organism c...

Interspecific comparison of Cd bloaccumulation in European Pectinidae (Chlamys varia and Pecten maximus)

The uptake and loss kinetics of Cd were determined in two species of scallops from the European coasts, the variegated scallop Chlamys varia and the king scallop Pecten maximus, following exposures via seawater, phytoplankton and sediment using highl...

High rate algal pond treatment for water reuse in a marine fish recirculation system: Water purification and fish health

Regardless of the degree of closure of a recirculation system, effluents are produced and replacement water is needed, which limits the possibility of locating a seawater production system away from the shoreline. At the Palavas Ifremer station, in t...

How many genera of vascular plants are endemic to New Caledonia ? A critical review based on phylogenetic evidence

New Caledonia is a biodiversity hotspot located in the south-western Pacific, well known for its rich, unique and endangered flora. The island flora has a high level of endemism not only at the species level (75%), but also at the generic and family ...