Taxonomy

Syzygium balansae (Guillaumin) J.W.Dawson
endemique
UICN

Synonyms

Caryophyllus balansae Guillaumin

Red List Status -

Vulnerable (VU) , assessed in 26/01/2018

Syzygium balansae is an endemic shrub or tree from New Caledonia with a scattered distribution in the far north west (from Koumac to Poum) with a small extension the north east (Mandjelia and Plateau de Kokingone) and in the south (Thio and Haute Ouaménie) of Grande Terre. It is found in dense humid forest and forest galleries along side river banks on volcano sedimentary and ultramafic soil between 5 and 150 m asl. The population size of S. balansae is unknown. The main threats are bushfires, Rusa deer (Rusa timorensis) and mining activities that cause habitat degradation. Its extent of occurrence (EOO) and area of occupancy (AOO) are 8,330 and 72 km², respectively, while the number of localtions is estimated to be 10. Therefore, S. balansae is listed as Vulnerable (VU) under criteria B1ab(ii,iii,v)+B2ab(ii,iii,v).

Geographical area


S. balansae is endemic of New Caledonia where it has a scattered distribution in the far north west (from Koumac to Poum) with a small extension the north east (Mandjelia and Plateau de Kokingone) and in the south (Thio and Haute Ouaménie) of Grande Terre.

Population


Population size is unknown.

Habitat


S. balansae occurs in dense humid forest and forest galleries along side river banks on volcano sedimentary and ultramafic soil between 5 and 150 m asl.

Threats


The main threats are bushfires, invasive species (Rusa deer (Rusa timorensis)) and mining activities (Tiebaghi and Kouaoua) that cause habitat degradation.

Conservation


This species is not protected by legislation in New Caledonia and it does not occur in any protected area. This species should be included in the regional legislation for a better protection of the species and awarness should be raised amongs the local population. Herbarium specimens should be more collected to better estimate its distribution and its extinction risks.

Bibliography


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

Dawson J.W. 1999. Flore de la Nouvelle-Calédonie et dépendances. Volume 23 : Myrtaceae Myrtoideae 1 : Syzygium.

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): Héquet, V., Vandrot, H., Barrabé, L., Amice, R., Butin, J., Cazé, H., Fleurot, D., Suprin, B., Chambrey, C., Laudereau, C., Haverkamp, C., Fogliani, B.

Reviewer(s): Gâteblé, G.

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


Geographical distribution