Taxonomy

endemique
UICN

Synonyms

Phyllanthus polygynus M.Schmid

Red List Status -

Endangered (EN) , assessed in 20/08/2020

Phyllanthus polygynus is an endemic shrub or small tree, endemic of New Caledonia and restricted to the north west of Grande Terre, from Plateau de Tia to Poum. This species occurs in maquis and in clear forests on ultramafic substrates up to 250 m asl. The main identified threats are linked to habitat damage by uncontrolled bushfires and indirectly by mining activities at Tiébaghi and Poum. Its extent of occurrence (EOO) and area of occupancy (AOO) are respectively estimated to be of 1,086 km² and 36 km² while the number of locations is estimated to be 5. Using criterion B and with the estimation of a continuous decline of all the concerned subcriteria, Phyllanthus polygynus is assessed as Endangered (EN) B1ab(i,ii,iii,v)+2ab(i,ii,iii,v).

Geographical area


Phyllanthus polygynus is endemic of New Caledonia where it is restricted to the north west of Grande Terre, from Plateau de Tia to Poum.

Population


Population size is unknown.

Habitat


Phyllanthus polygynus occurs in maquis and in clear forests on ultramafic substrates up to 250 m asl.

Threats


The main identified threats are linked to habitat damage by uncontrolled bushfires and indirectly by mining activities at Tiébaghi and Poum.

Conservation


Phyllanthus genus is protected by legislation in Province Nord. None of the subpopulations occur within a protected area. This species would benefit from in situ and ex situ conservation actions. It is recommended to inform the DSCGR (emergency services), responsible for the coordination of the firefighting effort on the presence of the species in the concerned areas. It is moreover suggested to realise field surveys at Plateau de Tia to better estimate its distribution range and population size.

Bibliography


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.

McPherson, G.; Schmid, M. 1991. Flore de la Nouvelle-Calédonie et dépendances. Volume 17 : Euphorbiaceae II Phyllanthaceae.

Experts


Assessor(s): Amice, R., Barrière, R., Butin, J., Cazé, H., Dumontet, V., Fleurot, D., Garnier, D., Gâteblé, G., Héquet, V., Laudereau, C., Vandrot, H., Veillon, J.

Reviewer(s): Lannuzel, G.

Facilitator(s): Meyer, S., Warimavute, G.


Geographical distribution