Read J., Hope G.S., Gaudrie E., Jaffré Tanguy, Veillon Jean-Marie. (1995). Population dynamics in some rainforests on ultramafic soils in New Caledonia and their impact on patterns of canopy richness. In :
Deuxième conférence internationale sur l'écologie des milieux serpentiniques, Nouméa, 31 juillet-5 août 1995 : résumés = Second international conference on serpentine ecology, Noumea, july 31-august 5, 1995 : abstracts. Nouméa : ORSTOM, p. 39. Ecologie des Milieux Serpentiniques : Conférence Internationale = Serpentine Ecology : International Conference, 2., Nouméa (NCL), 1995/07/31.
Titre du document
Population dynamics in some rainforests on ultramafic soils in New Caledonia and their impact on patterns of canopy richness
Année de publication
1995
Type de document
Colloque
Auteurs
Read J., Hope G.S., Gaudrie E., Jaffré Tanguy, Veillon Jean-Marie
In
Deuxième conférence internationale sur l'écologie des milieux serpentiniques, Nouméa, 31 juillet-5 août 1995 : résumés = Second international conference on serpentine ecology, Noumea, july 31-august 5, 1995 : abstracts
Source
Nouméa : ORSTOM, 1995,
p. 39
Colloque
Ecologie des Milieux Serpentiniques : Conférence Internationale = Serpentine Ecology : International Conference, 2., Nouméa (NCL), 1995/07/31
Permanent plots are being established in monodominant and mixed rainforests over a range of altitudes on ultramafic soils in New Caledonia to investigate the factors determining canopy richness. Initial studies are examining the dynamics of the major tree species to assess the role of disturbance and successional change in controlling the canopy richness of these stands. The monodominant stands being investigated are dominated by Nothofagus spp. and have a high species richness in the understorey, despite the low richness of the upper canopy. Many of the species recorded in the understorey, are potentially capable of reaching the canopy, including species that typically occur in the canopy of nearby mixed rainforests. However, the dominant canopy species of Nothofagus are rare as saplings, with the population sample showing a bell-shaped size distribution. It therefore appears that these Nothofagus-dominated forests are successional, and in the hypothetical absence of disturbance, the Nothofagus-dominated canopy is likely to be replaced by a species rich canopy similar in composition to the adjacent mixed rainforests. Study of adjacent mixed rainforests suggests that these are seral forests, with many of the common canopy species not represented in the understorey. Some of the canopy species are well represented in the smaller size classes, and there are few canopy species occurring in the understorey which are not also represented in the canopy. Therefore, these forests may eventually become less species-rich as the forest ages, with only the most shade-tolerant species occuring in the canopy. (Résumé d'auteur)
Plan de classement
Formations végétales [082VEGET02]
Descripteurs
FORET DENSE ; ROCHE ULTRABASIQUE ; CANOPEE ; DYNAMIQUE DE POPULATION ; STRUCTURE DU PEUPLEMENT
Description Géographique
NOUVELLE CALEDONIE
Localisation
Fonds IRD [F A010005638] ;
Nouméa
Identifiant IRD
fdi:010005650
