Taxonomy

endemique
protegee
UICN

Red List Status -

Critically Endangered (CR) , assessed in 08/12/2016

Protected species -

in Northern Province , in Northern Province

Diospyros tridentata is an endemic tree of New Caledonia restricted to the Koumac area in northern Grande Terre. It is found in dry forest at low-mid altitude on calcareous substrate. The main threats impacting this species come from habitat fragmentation and degradation linked to invasive species (Rusa rusa deer (Rusa timorensis)) and uncontrolled bushfires. This species is only known from a single population estimated fewer than 250 mature individuals. A lack of regeneration has been observed. Its area of occupancy (AOO) and extent of occurrence (EOO) being both estimated 20 km², Diospyros tridentata is considered Critically Endangered (CR) according to criteria B1ab(iii,v) and C2a(ii) with an estimation of one location and an estimated continuous decline of habitat quality and number of mature individuals.

Geographical area


Diospyros tridentata is an endemic tree of New Caledonia restricted to the Koumac area in northern Grande Terre.

Population


This species is only known from a single population estimated fewer than 250 mature individuals. A lack of regeneration has been observed.

Habitat


It is found in dry forest at low-mid altitude (200-650 m asl) on calcareous substrate.

Threats


The main threats impacting this species come from habitat fragmentation and degradation linked to invasive species (Rusa rusa deer (Rusa timorensis)) and uncontrolled bushfires.

Conservation


This species is only protected by legislation in province Nord. It does not occur in any protected area. It is recommended to bring further prospections in order to better know its distribution and to count the population. This species would benefit from emergency conservation actions : ex-situ conservation (seeds banking, experimenting germination tests, nurseries) and in-situ by controlling invasive Rusa deer. As this species is threatened by bushfires, its stations must be included in the maps of Sécurité Civile.

Bibliography


Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Tronchet F., Veillon J.-M., & M. Chalopin 2016. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia. vers. 22.IV.2016.

White F.; Vink W. 1993. Flore de la Nouvelle-Calédonie et dépendances. Volume 19: Ebenacaeae-Winteraceae.

Morat, P.; Jaffré, T.; Tronchet, F.; Munzinger, J.; Pillon, Y.; Veillon, J.-M. and Chalopin, M. 2012. The taxonomic database « FLORICAL » and characteristics of the indigenous flora of New Caledonia. Adansonia(334) , p.177-219.

Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.

Experts


Assessor(s): Schatz, G., Amice, R., Bruy, D., Butin, J., Cazé, H., Dumontet, V., Fleurot, D., Garnier, D., Hequet, V., Lowry, P., Suprin, B., Tanguy, V., Vandrot, H., Veillon, J.

Reviewer(s): Maura, J.

Facilitator(s): Tanguy, V., Warimavute, G.


Geographical distribution