Observatoire de l'environnement Nouvelle Calédonie

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

Affichage des résultats: 361 à 370

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Rarefaction and elevational richness pattern: A case study in a high tropical island (New Caledonia, SW Pacific)

Aims. To analyse the elevational richness pattern of tree species in New Caledonian tropical rain forests and investigate how the richness pattern is affected by standardizing on area vs standardizing on number of individuals and by sample coverage. ...

Environmental significance of microbialites in reef environments during the last deglaciation

In situ microbialites occurring in reef rocks dredged between 80 and 130 in water depth on the modern fore-reef slopes of Tahiti and the Marquesas islands yield ages ranging from 17,100 2900 to 4410 2250 years BP, suggesting that they played a promin...

Contrasted allometries between stem diameter, crown area, and tree height in five tropical biogeographic areas

Across five biogeographic areas, DBH-CA allometry was characterized by inter-site homogeneity and intra-site heterogeneity, whereas the reverse was observed for DBH-H allometry. Tree crowns play a central role in stand dynamics. Remotely sensed canop...

Evolution Géodynamique du domaine Ouest-offshore de la Nouvelle-Calédonie et de ses extensions vers la Nouvelle-Zélande

The southwest Pacific results from the fragmentation of Gondwanaland since the Cretaceous time. The purpose of the current PhD work is to deepen our understanding of the history of the New Caledonia and Fairway basins, located west of New Caledonia,...

Ni cycling in mangrove sediments from New Caledonia

Covering more than 70% of tropical and subtropical coastlines, mangrove intertidal forests are well known to accumulate potentially toxic trace metals in their sediments, and thus are generally considered to play a protective role in marine and lagoo...

Succession within the prokaryotic communities during the VAHINE mesocosms experiment in the New Caledonia lagoon

N-2 fixation fuels similar to 50% of new primary production in the oligotrophic South Pacific Ocean. The VAHINE experiment has been designed to track the fate of diazotroph-derived nitrogen (DDN) and carbon within a coastal lagoon ecosystem in a comp...

Influence of species and stand position on isotopic and molecular composition of leaf litter during degradation in an urban mangrove forest

Understanding the diagenetic processes of organic matter (OM) within mangrove forests is essential to grasp ecosystem dynamics and exchanges with adjacent ecosystems. This study investigated the influence of urban runoff on leaf litter degradation in...

Influence of species and stand position on isotopic and molecular composition of leaf litter during degradation in an urban mangrove forest

Understanding the diagenetic processes of organic matter (OM) within mangrove forests is essential to grasp ecosystem dynamics and exchanges with adjacent ecosystems. This study investigated the influence of urban runoff on leaf litter degradation in...

Guide de bonnes pratiques : exploitation minière et biodiversité

Ce document a pour but d'aider les membres (et non-membres) à assumer cet engagement, en apportant une orientation pertinente aux gestionnaires des sièges sociaux aussi bien que des établissements distincts.L'objectif principal est d'inciter et de...

Synthèse des connaissances sur le suivi de la qualité de l’air et des pluies dans la zone d’influence du complexe industriel et minier de Vale N...

Poussières, SO2, NOX... Les polluants atmosphériques issus des activités industrielles et minières constituent une menace pour la biodiversité exceptionnelle de la Nouvelle-Calédonie. L'OEIL s'est penché sur cette problématique et a missionn...