Gongrodiscus parvifolius is an endemic shrub or tree (up to 6 m high) distributed in the south west of Grande Terre, from Mont Koghis to Mont Do (La Foa). This species occurs in shrubland and dense humid forest on ultramafic substrate between 800-1,026 m asl. The main threats identified are bushfires (Mt Do, Dzumac, Tontouta, Koghis) and potentially feral pigs at Humbolt and Haute Ni that contribute to the decline of habitat quality. Its extent of occurrence (EOO) is estimated to be 654 km² and an area of occupation (AOO) of 36 km² with a number of location equal to six. Therefore G. parvifolius qualififies as Vulnerable under criteria B1ab (iii, v)+B2ab (iii,v) with an estimated decline of habitat quality and number of mature individuals.

Geographical area

G. parvifolius is endemic to New Caledonia and it is distributed in the south west of Grande Terre, from Mont Koghis to Mont Do (La Foa)

Population

Population size in unknown.

Habitat

G. parvifolius occurs in shrubland and dense humid forest on ultramafic substrate between 800-1,026 m asl.

Threats

The main threats identified are bushfires (Mt Do, Dzumac, Tontouta, Koghis) and potentially feral pigs (Sus scrofa) at Humboldt and Haute Ni that contribute to the decline of habitat quality.

Conservation

Gongrodiscus parvifolius is not protected by legislation in New Caledonia and it does occur in 5 protected areas: la Dumbéa, Mont Do, Mont Humboldt, Vallée de la Thy, Haute Dumbéa. It is recommended to inform the DSCGR (emergency services), responsible for the coordination of the firefighting effort, and the Conservatoire d'espaces naturels de Nouvelle-Calédonie (New Caledonia natural spaces conservatory), CEN, which coordinates the New Caledonian Invasive Species Programme, on the presence of the species in the concerned areas.

Bibliography

Buerki et al. 2012. Phylogenetic inference of New Caledonian lineages of Sapindaceae: Molecular evidence requires a reassessment of generic circumscriptions.. Taxon(61 (1)) , p.109-119.

Turner H. V. & van Der Ham R. W. J. M. 1996. A taxonomic and pollen morphological revision of the genus Gongrodiscus (Sapindaceae). Adansonia : Botanique, Phytochimie(18 (3-4)) , p.339-349.

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.

Experts

Assessor(s): Amice, R., Butin, J., Cazé, H., Garnier, D., McCoy, S., Veillon, J., Gâteblé, G., Fleurot, D., Laudereau, C., Suprin, B., Héquet, V., Bruy, D., Vandrot, H.

Reviewer(s): Lannuzel, G.

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