Taxonomy
Pittosporum dzumacense
Red List Status -
Data Deficient (DD) , assessed in 23/07/2015
Pittosporum dzumancense is an endemic shrub of New Caledonia, which as currently taxonomically delimited, is largely distributed from the north to the south of the main island, Grande Terre. Nevertheless current phylogenetic studies suggest that P. dzumacense and P. xanthanthum species are genetically similar, even by locality. Individuals from Dzumac, Mont Do and Pouembout locations could thus be splitted into three sub-species, belonging to a potentially common species, however further study is needed before any taxonomic revision can take place. P. dzumancense is assessed under Data Deficient category until taxonomic species delimitation are clarified.
Geographical area
P. dzumancense is an endemic shrub of New Caledonia, largely distributed from south to north of the main island, called Grande Terre.
Population
Population size is unknown.
Habitat
P. dzumacense is found on dense humid forest, on forest edges and in shrubland on ultramafic substrate at an altitudinal range 400 - 1,100 m asl.
Threats
P. dzumacense does not appear affected by any kind of threat in particular.
Conservation
P. dzumacense is not protected by any legislation but does occur in a large number of protected areas : réserve naturelle du Mont Humboldt, réserve naturelle du Massif du Kouakoué, réserve naturelle du Mont Mou, réserve naturelle du Mont Do, Parc Provincial de la Rivière Bleue, réserve naturelle de la Nodéla. In order to assess extinction risk of P. dzumacense, it is necessary to conduct further morphological and phylogenetical studies to be able to accurately distinguish the taxonomy of P. dzumacense and P. xanthanthum, especially to determine if they represent a single widespread species.
Bibliography
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
Tirel, C. & Veillon J.-M. 2002. Flore de la Nouvelle-Calédonie et dépendances. Volume 24 : Pittosporaceae.
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.
Experts
Assessor(s): Gemmill, C., Veillon, J., Amice, R., Cazé, H., Dumontet, V., Fleurot, D., Garnier, D., Gâteblé, G., Maggia, L.
Reviewer(s): Tanguy, V.
Facilitator(s): Chanfreau, S.