Taxonomy

Polyscias ouaiemensis Lowry & G.M.Plunkett, ined.
endemique
UICN

Synonyms

Tieghemopanax ouaiemensis Lowry, in herb.

Red List Status -

Vulnerable (VU) , assessed in 09/12/2016

Polyscias ouaiemensis is an endemic small tree of New Caledonia restricted to a single forest located on the Roches de la Ouaïème. This species occurs in a forest patch on volcano-sedimentary substrate that does not currently seem to be subject to threats. However, monitoring of bushfires and Rusa Deer (Rusa timorensis) is necessary as they represent potential threats that could be quite severe for this species. Therefore, Polyscias ouaiemensis is considered Vulnerable (VU D2) because of its tiny area of occupancy (AOO) and combined with these potential threats, which could rapidly drive the species to CR or even EX.

Geographical area


Polyscias ouaiemensis is an endemic small tree of New Caledonia restricted to a single forest located on the Roches de la Ouaïème.

Population


Population size is unknown. This species is known of a single population.

Habitat


This species occurs in a mostly undisturbed forest patch on volcano-sedimentary substrate at rather high altitude (670-900 m asl).

Threats


The forest patch of Polycias ouaiemensis does not currently seem to be subject to threats. However, monitoring of the situation (impact of bushfires and Rusa deer (Rusa timorensis)) is highly recommended.

Conservation


Polyscias ouaiemensis is not protected by local legislation and does not occur in a formal protected area. The area of Roches de la Ouaïème hosts numerous narrow-endemic species and it would make sense to protect this area.

Bibliography


Lowry P.P.L. and Plunkett G.M. 2018. A Taxonomic revision of Polyscias subg. Tieghemopanax.

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.

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

Experts


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

Reviewer(s): Maura, J.

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


Geographical distribution