Taxonomy

Ptisana attenuata (Labill.) Murdock
endemique
UICN

Synonyms

Marattia pellucida sensu Marattia attenuata Labill.

Red List Status -

Near Threatened (NT) , assessed in 10/06/2017

Ptisana attenuata is an endemic fern, spread from Col d'Amoss in the north to Port Boisé in the south of Grande Terre in New Caledonia. This species is common and occurs in dense humid forest on volcano-sedimentary substrate, at an altitudinal range of 150-860 m asl. Although it is highly impacted by rusa deer (Rusa timorensis) and feral pigs (Sus scrofa) in some locations, this species does not seem globally threathened due to its large distribution and abondance. Its area of occupancy (AOO) and extent of occurrence (EOO) being respectively estimated to 120 and 8,800 km², Ptisana attenuata is considered Near Threatened (NT) close to VU B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) with an estimated decline of the subcriteria concerned.

Geographical area


Ptisana attenuata is an endemic fern, spread from Col d'Amoss in the north to Port Boisé in the south of Grande Terre in New Caledonia.

Population


Population size is unknown.

Habitat


Ptisana attenuata occurs in dense humid forest on volcano-sedimentary substrate, at an altitudinal range of 150-860 m asl.

Threats


The main threat impacting this species comes from direct impact (consumption) caused by invasive species (rusa deer (Rusa timorensis) and feral pigs (Sus scrofa)). Feild observations indicate a decline of population in Parc des Grandes Fougères and in some locations (Col d'Amieu, Boghen, Rembai) it seems to have disappeared. However, this species does not seem globally threathened due to its large distribution and its abondance.

Conservation


Ptisana attenuata is unprotected by legislation however it occurs in several protected areas: Parc des Grandes Fougères, Rivière bleue, Aoupinié, Haute Yaté, Vallée de la Thy. It is recommended to inform the Conservatoire d'espaces naturels de Nouvelle-Calédonie (New Caledonia natural spaces conservatory), which coordinates the New caledonian Invasive Species Programme, on the situation of the species in the concerned areas.

Bibliography


Brownlie G. 1969. Flore de la Nouvelle-Calédonie et Dépendances, Volume 03 : Pteridophytae.

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., Barrabé, L., Cazé, H., Chambrey, C., Garnier, D., Héquet, V., Letocart, D., Letocart, I.

Reviewer(s): Perrie, L., Tanguy, V.

Facilitator(s): Maura, J., Warimavute, G., Tanguy, V.


Geographical distribution