Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 1843 résultats pour les termes de recherche: phanérogames marines OR herbier

Affichage des résultats: 401 à 410

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Observer, évaluer et suivre la biodiversité sous marine des lagons : Intérêt des techniques vidéo rotatives en haute dé:nition. Où en est-on en...

This article first draws up a balance sheet of all various implemented techniques to observe and monitor the shallow marine biodiversity. Then the article focuses on the techniques of the rotating high resolution submarine video and their implementat...

Apport du satellite SPOT à la connaissance des écosystèmes récifaux coralliens. La végétation marine de l'île de Moorea, Polynésie française

Are planktonic larvae of marine benthic invertebrates too scarce to compete within species?

Several models for the evolution of complex life histories have assumed a carrying capacity for both larval and postlarval stages. In addition, the densities of larvae in laboratory experiments are often so high that there is competition for food. Pu...

Remote High-Definition Rotating Video Enables Fast Spatial Survey of Marine Underwater Macrofauna and Habitats

Observing spatial and temporal variations of marine biodiversity from non-destructive techniques is central for understanding ecosystem resilience, and for monitoring and assessing conservation strategies, e.g. Marine Protected Areas. Observations ar...

Fishers' perceptions as indicators of the performance of Marine Protected Areas (MPAs)

How users perceive the performance of Marine Protected Areas (MPAs) is fundamental for the social acceptance of these zones. Moreover, their perceptions may be relevant for monitoring the effects of MPAs on extractive activities. This study analyzes ...

First Evidence of Palytoxin and 42-Hydroxy-palytoxin in the Marine Cyanobacterium Trichodesmium

Marine pelagic diazotrophic cyanobacteria of the genus Trichodesmium (Oscillatoriales) are widespread throughout the tropics and subtropics, and are particularly common in the waters of New Caledonia. Blooms of Trichodesmium are suspected to be a pot...

Etude sur l'état des lieux de la pêche professionnelle dans le Parc naturel marin d'Iroise - Mesures réglementaires et mesures de gestion (Lot 2)

Herbivorous fishes and the potential of Caribbean marine reserves to preserve coral reef ecosystems

1. The development of macroalgae to the detriment of corals is now one of the major threats to coral reefs. Herbivorous fishes are partly responsible for algal regulation on coral reefs and their overexploitation favours the shift from scleractinian ...

Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part I: One single turbine

The ambient turbulence intensity in the upstream flow plays a decisive role in the behaviour of horizontal axis marine current turbines. Experimental trials, run in the IFREMER flume tank in Boulogne-Sur-Mer (France) for two different turbulence int...

Experimental study of the turbulence intensity effects on marine current turbines behaviour. Part II: Two interacting turbines

The future implantation of second generation marine current turbine arrays depends on the understanding of the negative interaction effects that exist between turbines in close proximity. This is especially the case when the turbines are axially alig...