Taxonomy
Common name :
Wayu (xârâcùù)
Synonyms
Casuarina chamaecyparis J.Poiss. • Casuarina tenella Schltr.Red List Status -
Least Concern (LC) , assessed in 22/03/2023
Gymnostoma chamaecyparis is a large endemic tree from New Caledonia. It is distributed in the north west (from Nékoro to Poum) and the ultramafic areas in the southern half of Grande Terre ( from Ouinné to Houaïlou). It occurs in shrubland on serpentine and ultramafic substrates up to 1,150 m asl. Some subpopulations may be impacted by habitat degradation by bushfires or mining activities, but globally this species does not seem to be threatened. Its extent of occurrence (EOO) and area of occupancy (AOO) are estimated at 10,217 and 184 km², respectively. Therefore, Gymnostoma chamaecyparis is listed as Least Concern (LC).
Geographical area
Gymnostoma chamaecyparis is endemic to New Caledonia where it is distributed in the north west (from Nékoro to Poum) and the ultramafic areas in the southern half of Grande Terre ( from Ouinné to Houaïlou).
Population
The population size is unknown.
Habitat
This species grows in shrubland on serpentine and ultramafic substrates up to 1,150 m asl.
Threats
Some subpopulations may be impacted by habitat degradation by bushfires or mining activities, but globally this species does not seem to be threatened.
Conservation
Gymnostoma chamaecyparis is unprotected by legislation in New Caledonia but it occurs in three protected areas: Forêt de Saille, Mont Mou, Côte Oubliée.
Bibliography
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
L'Huillier L.; Jaffré T. and Wulff A. 2010. Mines et Environnement en Nouvelle-Calédonie : les milieux sur substrats ultramafiques et leur restauration.
Morat, P.; Jaffré, T.; Tronchet, F.; Munzinger, J.; Pillon, Y.; Veillon, J.-M. and Chalopin, M. 2012. Le référentiel taxonomique Florical et les caractéristiques de la flore vasculaire indigène de la Nouvelle-Calédonie [The taxonomic database « FLORICAL » and characteristics of the indigenous flora of New Caledonia]. Adansonia sér 3(34) , p.177-219.
Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Rouhan G., Bruy, D., Veillon J.-M., & M. Chalopin 2020. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia [continuously updated].
Experts
Assessor(s): Amice, R., Bruy, D., Cazé, H., Eltabet, N., Garnier, D., Fleurot, D., Lannuzel, G., Laudereau, C., Vandrot, H.
Reviewer(s): Meyer, S.
Facilitator(s): Warimavute, G., Fourdrain, A.