Taxonomy
Red List Status -
Near Threatened (NT) , assessed in 22/03/2023
Alyxia humboldtensis is a small procumbent liana endemic to New Caledonia where it is is known from only one population, located near the Mont Humboldt summit. It grows in the cyperaceous vegetation between peridotite rocks at 1,500 m asl. It is not threatened at the moment, but as it occurs in one locality at high altitudes, it could be impacted by climate change in the future, although the exact timescale and extent of impact are uncertain. Therefore, Alyxia humboldtensis is precautionarily listed as Near Threatened (NT), approaching the threshold for Vulnerable under criterion D2.
Geographical area
Alyxia humboldtensis is endemic to New Caledonia where it is is known from only one population, located near the Mont Humboldt summit.
Population
The population size is not known.
Habitat
This species occurs in the cyperaceous vegetation between peridotite rocks at 1,500 m asl.
Threats
This species is not threatened at the moment, but as it occurs in one locality at high altitudes, it could be impacted by climate change in the future, although the exact timescale and extent of impact are uncertain.
Conservation
Alyxia humboldtensis is not protected by legislation in New Caledonia and it occurs in one protected area : Côte Oubliée.
Bibliography
Boiteau Pierre avec collaboration de Lucie Allorge 1982. Flore de la Nouvelle Calédonie et dépendances. Volume 10 : Apocynacées.
Lannuzel et al. 2024. Alyxia Banks ex R.Br. in New Caledonia: a clarification of several species complexes, nomenclatural notes, and a description of three new species. Phytotaxa(649 (1)) , p.1-43.
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.
Munzinger J., Morat Ph., Jaffré T., Gâteblé G., Pillon Y., Rouhan G., Bruy, D., Veillon J.-M., & M. Chalopin 2020. FLORICAL: Checklist of the vascular indigenous flora of New Caledonia [continuously updated].
Endemia.nc 2016. Faune et Flore de Nouvelle-Calédonie.
Experts
Assessor(s): Amice, R., Bruy, D., Cazé, H., Eltabet, N., Garnier, D., Fleurot, D., Lannuzel, G., Laudereau, C., Vandrot, H.
Reviewer(s): Meyer, S.
Facilitator(s): Warimavute, G., Fourdrain, A.