Pteris adscensionis

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Bibliography

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	POLYPODIOPHYTA	POLYPODIOPSIDA	PTERIDALES	PTERIDACEAE

Scientific Name:	Pteris adscensionis
Species Authority:	Sw.

Assessment Information [top]

Red List Category & Criteria:

Critically Endangered B1ab(iii)+2ab(iii) ver 3.1

Year Published:

2003

Assessor/s:

Gray, A.

Reviewer/s:

Cronk, Q., Cairns-Wicks, R. (South Atlantic Island Plants Red List Authority) & Jermy, C., Ranker, T. (Pteridophyte Red List Authority)

Justification:
The last assessment (Cronk 1980) listed P. adscensionis as Endangered. It should now be considered as Critically Endangered using the new IUCN codes. Information comes from literature sources and personal observation. The population has been stable over the last five years but as it is known mostly from one location on Ascension it is extremely susceptible to extinction in the near future.

History:

1997

–

Endangered (Walter and Gillett 1998)

Geographic Range [top]

Countries:	Native: Saint Helena (Ascension)
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population Trend:	Unknown

Population Trend:

Unknown

Habitat and Ecology [top]

Systems:	Terrestrial

Systems:

Terrestrial

Bibliography [top]

	Ashmole, P. and Ashmole M. 2000. St Helena and Ascension Island: a natural history. Anthony Nelson, Oswestry, UK. Cronk, Q.C.B. 1992. Relict floras of Atlantic Islands: patterns assessed. Biological Journal of the Linnean Society. 46: 91-103. Cronk, Q.C.B. 1997. Islands: stability, diversity, and conservation. Biological Conservation. 6: 477-493. Cronk, Q.C.B. 2000. The Endemic Flora of St. Helena. Anthony Nelson Publishers, Oswestry, UK. Duffey, E. 1964. The terrestrial ecology of Ascension Island. Journal of Applied Ecology 1: 219-251. Gray, A., Gardner, S., Kirk, L., Robinson, P., Smölka, Z. and Webster, L. 2000. The status and distribution of the endemic vascular flora of Ascension Island. Unpublished Report. IUCN. 2003. 2003 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 18 November 2003. White, R, and George, T. 2002. Status of endemic plants on Ascension Island in 2002. Ascension Conservation Draft Report.

Ashmole, P. and Ashmole M. 2000. St Helena and Ascension Island: a natural history. Anthony Nelson, Oswestry, UK.

Cronk, Q.C.B. 1992. Relict floras of Atlantic Islands: patterns assessed. Biological Journal of the Linnean Society. 46: 91-103.

Cronk, Q.C.B. 1997. Islands: stability, diversity, and conservation. Biological Conservation. 6: 477-493.

Cronk, Q.C.B. 2000. The Endemic Flora of St. Helena. Anthony Nelson Publishers, Oswestry, UK.

Duffey, E. 1964. The terrestrial ecology of Ascension Island. Journal of Applied Ecology 1: 219-251.

Gray, A., Gardner, S., Kirk, L., Robinson, P., Smölka, Z. and Webster, L. 2000. The status and distribution of the endemic vascular flora of Ascension Island. Unpublished Report.

IUCN. 2003. 2003 IUCN Red List of Threatened Species. www.iucnredlist.org. Downloaded on 18 November 2003.

White, R, and George, T. 2002. Status of endemic plants on Ascension Island in 2002. Ascension Conservation Draft Report.

Citation:	Gray, A. 2003. Pteris adscensionis. In: IUCN 2011. IUCN Red List of Threatened Species. Version 2011.2. <www.iucnredlist.org>. Downloaded on 25 May 2012.
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