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: 351 à 360

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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 ...

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...

Infertile landscapes on an old oceanic island: the biodiversity hotspot of New Caledonia

The OCBIL theory comprises a set of hypotheses to comprehend the biota of old, climatically buffered, infertile landscapes (OCBILs). Here, we review evidence from the literature to evaluate the extent to which this theory could apply to the biodivers...

Millennial-aged organic matter preservation in anoxic and sulfidic mangrove soils: Insights from isotopic and molecular analyses

Mangrove forests are known as coastal carbon sinks, but the long-term (millennium-scale) preservation processes of organic matter (OM) in their soils and the role of sulphur in these processes are still not fully understood. These processes are cruci...

Formation of new beaches from lahar deposits, Ambae volcano, Vanuatu

Lahar deposits resulting from the eruption of Ambae (Vanuatu) in 2017–2018 were transformed into black sand beaches at the discharge points of water flow paths. This occurrence represents a novel and unreported phenomenon for Ambae. This study prop...

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...

Formation of new beaches from lahar deposits, Ambae volcano, Vanuatu

Lahar deposits resulting from the eruption of Ambae (Vanuatu) in 2017–2018 were transformed into black sand beaches at the discharge points of water flow paths. This occurrence represents a novel and unreported phenomenon for Ambae. This study prop...

Spatialisation de l'aléa érosion en Nouvelle-Calédonie

Rapport dont l'objectif étant de faire évoluer le modèle de spécialisation des zones sensibles à l'érosion en Nouvelle-Calédonie afin d'affiner les résultats et de mieux évaluer les zones côtières vulnérables et à terme de développer de...

Restauration active d'une forêt sèche : Pointe Maa - Analyse statistique des données collectées de 2006 à 2008

Le présent rapport porte sur l’analyse statistique de données issues d’une parcelle expérimentale de plantation créée en 2006 et reboisée au cours des années suivantes. Il vise à identifier les espèces les mieux adaptées à la restaurat...

Synthèse annuelle des résultats des suivis environnementaux du Grand Sud (2014) - Bilan technique

Dans le cadre de ses missions de suivi de l'environnement et d'information, l'Observatoire de l'environnement en Nouvelle-Calédonie (OEIL) réalise depuis 2013 une synthèse annuelle des résultats existants et disponibles des suivis environnementau...