Taxonomy

Ptisana attenuata (Labill.) Murdock
endemique
UICN

Synonyms

Marattia pellucida sensu Marattia attenuata Labill.

Red List Status -

Vulnerable (VU) , 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. It occurs in dense humid forest on volcano-sedimentary substrate, at an altitudinal range of 150-860 m asl. Currently highly threatened by rusa deer (Rusa timorensis) and feral pigs (Sus scrofa) in some locations, experts estimate a 30% population reduction in a time period of 100 years including the past and future. Ptisana attenuata is therefore assessed as Vulnerable (VU) with criteria A4(c+e).

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)), which may lead to a lack of regeneration. Formerly common in Parc des Grandes Fougères, its population has dramatically declined and it seems to have disappeared from Col d'Amieu, Boghen, Rembai.

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 3: Pteridophytae.

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.

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

Experts


Assessor(s): Amice, R., Barrabé, L., Cazé, H., Chambrey, C., Garnier, D., Hequet, V., Letocart, D., Letocart, I.

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

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


Geographical distribution