Observatoire de l'environnement Nouvelle Calédonie

Il y a environ 2304 résultats pour les termes de recherche: ~riviere OR creek OR eau douce

Affichage des résultats: 811 à 820

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Structure and temporal fluctuations of two interdital seagrass-bed communities in New Caledonia (SW Pacific ocean)

The structure and trophic organisation of two intertidal seagrass-bed communities (#Halodule uninervis$ and #Thalassia hemprichii$ were examined on the South-West coast of New Caledonia (SW Pacific Ocean), from April 1989 to March 1990. Five benthic ...

Comparative ichthyotoxicity of shallow and deep water sponges of New Caledonia;Proceedings of the sixth international coral reef symposium

A survey of comparative ichthyotoxicity in marine sponges from shallow and deep water in the Southern province of New Caledonia was conducted. Test fish #Gambusia affinis$ (#Vertebrata, Pisces$) were exposed to aqueous macerates of 30 shallow water a...

The echinoderms of the soft bottoms of the South-Western lagoon of New Caledonia;Proceedings of the sixth international coral reef symposium

A bionomic mapping survey of the soft bottoms of the South-Western lagoon of New Caledonia was carried out by dredging. From analysis of the sediments and the fauna and flora found in 489 dredgings, it was possible to define three main benthic commun...

Variations in the fish catch composition in the Bay of St Vincent, New Caledonia, as determined by experimental trawling

An experimental trawl survey was conducted in the Bay of St Vincent between December 1984 and April. In all, 85 hauls were performed during cruises. The trawled fish represented 233 species and 59 families. Biomass and density estimates declined 13-f...

Reproductive cycles of the bivalve molluscs Atactodea striata (Gmelin), Gafrarium tumidum Röding and Anadara scapha (L.) in New Caledonia

Monthly samples of the bivalves #Atactodea striata$, #Gafrarium tumidum$ and #Anadara scapha$ were collected over 1 year from the littoral zone on the South-Western coast of New Caledonia. #A. striata$ and #G. tumidum$ were studied by macroscopic exa...

Reproductive biology of the holothurians from major communities of the New Caledonian lagoon

The reproductive biology of nine species of aspidochirote holothurians from the majour communities of the New Caledonian lagoon has been analysed. The data were obtained from monthly sampling from 1978 to 1982 of their populations on reef slopes and ...

Comparative ichthyotoxicity of shallow and deep water sponges of New Caledonia;International coral reef symposium : poster

We have conducted a survey of toxicity distribution with depth of common marine sponges of the Southern province of New Caledonia. Test fish #Gambusia affinis$ (#Vertebrata, Pisces$) were exposed to aqueous macerates from 30 shallow water and 30 deep...

Abundance, richness and composition of lianas in forest communities along an elevation gradient in New Caledonia

Background: Lianas are an abundantand dynamic component of tropical forests, and their abundance ispredicted to increase with global change. A better understandingof factors that explain their distribution is required, especially onoceanic islands fo...

Bleaching forces coral's heterotrophy on diazotrophs and Synechococcus

Coral reefs are threatened by global warming, which disrupts the symbiosis between corals and their photosynthetic symbionts (Symbiodiniaceae), leading to mass coral bleaching. Planktonic diazotrophs or dinitrogen (N-2)-fixing prokaryotes are abundan...

Chemotypes and biomarkers of seven species of New Caledonian liverworts from the Bazzanioideae subfamily

Volatile components of seven species of the Bazzanioideae sub-family (Lepidoziaceae) native to New Caledonia, including three endemic species (Bazzania marginata, Acromastigum caledonicum and A. tenax), were analyzed by GC-FID-MS in order to index th...