Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1316 résultats pour les termes de recherche: nickel OR Ni

Affichage des résultats: 551 à 560

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Des indices révisés pour un meilleur suivi des eaux douces

Vers un meilleur suivi des eaux douces Contexte et objectifs Lors des ateliers organisés par l'OEIL en 2010 sur le suivi environnemental des eaux douces, il avait été mis en exergue la nécessité d'améliorer la fiabilité et la robustesse des ...

Rhizosphere bacteria of Costularia spp. from ultramafic soils in New Caledonia: diversity, tolerance to extreme edaphic conditions, and role in plant ...

Des rhizobactéries ont été isolées des racines de Costularia spp., carex pionnières des sols ultramafiques de Nouvelle-Calédonie, un " hotspot " de la biodiversité dans le Pacifique Sud. L'identification du genre, les capacités à tolérer le...

Mycorrhizal symbioses : their potential for soil rehabillitation and ecological restoration

In New Caledonia, nickel mining activities have drastic impacts on a rich but particularly fragile environment. Mining companies are more and more concerned with the need to restore the degraded sites, in adverse edaphic conditions. Symbioses, both n...

Importance of ectomycorrhizal fungi in ecological restoration of mining sites in New Caledonia, Koniambo Massif

The Koniambo Massif located in the north west of New Caledonia, is mainly composed of peridotite and serpentinite. It constitutes a large nickel deposit (NiO 0,1 to 5%) currently prospected by two mining companies (Falconbridge S.A. and SMSP). The ma...

Mines et environnement en Nouvelle-Calédonie : les milieux sur substrats ultramafiques et leur restauration

Présentation de l'éditeur : Les substrats ultramafiques - ou terrains miniers - à l'origine du minerai de nickel, couvrent près du tiers de la Nouvelle-Calédonie, qui se place parmi les premiers producteurs de ce métal dans le monde. Mais l'exp...

Ectotrophic mycorrhizal symbioses are dominant in natural ultramafic forest ecosystems of New Caledonia

Insularity, geological history and biogeography have made from New-Caledonia a hot spot of biodiversity where extremely diversified ecosystems occupies ultramafic terrains with drastic edaphic conditions in terms of fertility and metallic toxicity. I...

Twenty years after Jaffré et al. (1998), is the system of protected areas now adequate in New Caledonia?

Protected areas are the cornerstone on which conservation strategies are often built. Adapting systems of protected areas to rapid global changes is critical to meet the challenge of conservation in biodiversity hotspots. Twenty years ago, Jaffré et...

Burkholderia novacaledonica sp. nov. and B. ultramafica sp. nov. isolated from roots of Costularia spp. pioneer plants of ultramaficsoils in New Caled...

tThe taxonomic status of eleven rhizospheric bacterial strains belonging to the genus Burkholderia andisolated from roots of Costularia (Cyperaceae), tropical herbaceous pioneer plants growing on ultramaficsoils in New Caledonia, was investigated usi...

The flora of ultramafic soils in the Australia-Pacific Region : state of knowledge and research priorities

In the Australia-Pacific Region ultramafic outcrops are both widespread and extensive, covering thousands of km(2). Soils derived from ultramafic bedrock impose edaphic challenges and are widely known to host highly distinctive floras with high level...

Can we use the planation surface concept to reconstruct the morphogenesis of New Caledonia,? First low temperature thermochronological data

Nickel ore deposits of New Caledonia are formed in thick laterites and ferricretes developed on peridotites. Formation of this regolith remains unclear but combines stable phases with weathering profile development and preservation and mobile phases ...