Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1775 résultats pour les termes de recherche: eaux usées

Affichage des résultats: 471 à 480

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Les suivis environnementaux de Vale NC

Le projet Vale Nouvelle-Calédonie a de multiples impacts potentiels sur la qualité de l'environnement. Les milieux marins et terrestres, les eaux douces et l'air font donc l'objet de suivis environnementaux. En milieu marin, plusieurs réseaux doi...

Rapport technique : Point de situation relatif à l’épisode de perturbations physicochimiques de la rivière Kwë déclaré le 14 septembre 2022.

Le 14 septembre 2022 en début de soirée, l'OEIL apprenait par voie de presse qu'un dysfonctionnement du dispositif de pompage des eaux de drainage de l'aire de stockage des résidus (ASR) de Prony Resources avait entraîné « une augmentation des ...

Biodiversity of Mimosa pudica rhizobial symbionts (Cupriavidus taiwanensis, Rhizobium mesoamericanum) in New Caledonia and their adaptation to heavy m...

Rhizobia are soil bacteria able to develop a nitrogen-fixing symbiosis with legumes. They are taxonomically spread among the alpha and beta subclasses of the Proteobacteria. Mimosa pudica, a tropical invasive weed, has been found to have an affinity ...

Seasonal variation of riverine nutrient inputs in the northern Bay of Biscay (France), and patterns of marine phytoplankton response

Seasonal variations in nutrient inputs are described for the main rivers (Loire and Vilaine) flowing into the northern Bay of Biscay. The river plumes are high in N/P ratio in late winter and spring, but not in the inner plume during the summer. Cons...

Etude des pecheries, reflexions sur l'environment et la gestion multispecifique.

All considerations about halieutic stocks inevitably had to attain the recognition of relations which are established between the resource and its natural environment. These phenomenons are exposed in the first part. About consequences of human inter...

Inferring savannah-rainforest boundary dynamics from vegetation structure and composition : a case study in New Caledonia

A direct consequence of deforestation and forest fragmentation in the tropics is the increased importance of boundaries between forest fragments and savannahs. These boundaries are critical zones for understanding the dynamics of savannahs and forest...

Toward an inordinate fondness for stars, beetles and lobophora ? Species diversity of the genus lobophora (Dictyotales, Phaeophyceae) in New Caledonia

Until the recent use of molecular markers, species diversity of Lobophora, an ecologically important brown algal genus with a worldwide distribution in temperate and tropical seas, has been critically underestimated. Using a DNA-based taxonomic appro...

A framework for mapping small-scale coastal fisheries using fishers' knowledge

Collecting spatial information on fisheries catch and effort is essential to understanding the spatial processes of exploited population dynamics and to manage heterogeneously distributed resources and uses. The use of fishers' knowledge through geog...

Modulation of habitat-based conservation plans by fishery opportunity costs : a New Caledonia case study using fine-scale catch data

Numerous threats impact coral reefs and conservation actions are urgently needed. Fast production of marine habitat maps promotes the use of habitat-only conservation plans, where a given percentage of the area of each habitat is set as conservation ...

Variability in diel and seasonal in situ metabolism of the tropical gastropod Tectus niloticus

Researchers often use metabolic measurements in the field over narrow time periods to estimate an organism's metabolism over large time scales. Here, we measured in situ respiration, calcification and excretion rates of the tropical gastropod Tectus ...