Red List Status -Critically Endangered (CR) , assessed in 21/04/2017
Thiollierea sp.nov naounaorum is an endemic shrub of New Caledonia, known from Kopéto in Grande Terre. It occurs in shrubland on ultramafic substrate at an altitude of 300 m asl. The main impact identified comes from ongoing mining activites: Kopéto (SLN) and bushfires. Its area of occupancy (AOO) and extent of occurrence (EOO) are both equal to 4 km², while the species is known to exist at only a single location. Thiollierea sp.nov naounaorum is therefore assessed as Critically Endangered (CR) with criteria B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) with a continuing decline of all concerned sub-criteria.
Thiollierea sp.nov naounaorum is an endemic shrub of New Caledonia, known from Kopéto in Grande Terre.
Population size is unknown.
Thiollierea sp.nov naounaorum occurs in shrubland on ultramafic substrate at an altitude of 300 m asl.
The main impact identified comes from ongoing mining activites: Kopéto (SLN) and bushfires. 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.
Thiollierea sp.nov naounaorum is unprotected by legislation and it does not occur in any protected area. This species 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. Field surveys are needed in order to better protect the species.
Barrabé L., Mouly A., Lowry II P.P. & Muzinger J. 2011. Reinstatement of the endemic New Caledonian genus Thiollierea Montrouz. (Rubiaceae) necessitated by the polyphyly of Bikkia Reinw. as currently circumscribed. Adansonia(33) , p.115-134.
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
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.
Assessor(s): Barrabé, L., Amice, R., Bruy, D., Butin, J., Fleurot, D., Garnier, D., Gâteblé, G., Goxe, J., Hequet, V., Lannuzel, G., Suprin, B., Veillon, J.
Reviewer(s): Cazé, H.
Contributor(s): Mouly, A.
Facilitator(s): Warimavute, G., Maura, J., Tanguy, V.