Taxonomy

Pleioluma vieillardii (Baill.) Swenson & Munzinger
endemique
protegee
UICN

Synonyms

Pouteria vieillardii (Baill.) BaehniBeccariella vieillardii (Baill.) Swenson, Bartish & Munzinger

Red List Status -

Endangered (EN) , assessed in 12/10/2015

Protected species -

in Northern Province

Pleioluma vieillardii is a narrow endemic small tree found in the northwestern part of Grande Terre in New Caledonia. This species is only known from two massifs : Koniambo and Katépahié and Ouaté area. It is found in shrubland on an ultramafic substrate at an altitudinal range 535-720 m asl. Main threats are presented by ongoing mining activities in Koniambo, an increasing urbanisation in Voh and Koné and uncontrolled bushfires. Its extent of occurrence (EOO) and area of occupancy (AOO) are respectively estimated to be of 70 km² and 20 km² while the number of locations are estimated to be 4. Pleioluma vieillardii is therefore assessed as Endangered (EN) with criteria B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) with a continuing decline of all concerned sub-criteria.

Geographical area


Pleioluma vieillardii is a narrow endemic small tree found in the northwestern part of Grande Terre in New Caledonia. This species is only known from two massifs : Koniambo and Katépahié and Ouaté area.

Population


Population size is unknown.

Habitat


Pleioluma vieillardii is found in shrubland on an ultramafic substrate at an altitudinal range 535-720 m asl.

Threats


Main threats are presented by ongoing mining activities in Koniambo, an increasing urbanisation in Voh and Koné and uncontrolled bushfires. The twenty five year projection for mining operation indicate that severals individuals may be affected. New Caledonia contains between 20 - 30% of the world’s nickel resources and has experienced intense mining activities since the late 19th century which has generated soil erosion (1.2% of bare ground mapped by SPOT5 in 2007). Based on the distribution of metal-rich soils and site accessibility, these threats are predictable and planned (rise in nickel production from 60,000 to 200,000 tonnes per year between 2013 and 2015). Uncontrolled bushfires sweep across New Caledonia each year, especially during the dry season (an average of 20,000 ha of land is burnt each year, with dramatic peaks of 70,000 ha). Lowest parts of ultramafic areas are particularly exposed to such risk.

Conservation


Pleioluma vieillardii is not protected by legislation in Province Nord and does not occur in any protected area. It is recommanded to ensure prospection in Koniambo because this species is not currently monitoring. It would benefit from ex-situ and in-situ emergency conservation actions. It is proposed to ensure the follow-up of known sub-populations, to preserve a viable population on delimited perimeters on Koniambo. It is proposed to ensure propagation tests in order to assist future planting operations.

Bibliography


Wulff AS, Hollingsworth PM, Ahrends A, Jaffré T, Veillon J-M, L’Huillier L, et al. 2013. Conservation Priorities in a Biodiversity Hotspot: Analysis of Narrow Endemic Plant Species in New Caledonia.

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(2)) , p.177-219.

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.

Experts


Assessor(s): Tanguy, V., Veillon, J., Amice, R., Barrière, R., Chambrey, C., Fleurot, D., Lannuzel, G.

Reviewer(s): Vandrot, H.

Contributor(s): Wulff, A.

Facilitator(s): Chanfreau, S., Tanguy, V.


Geographical distribution