Ravenea dransfieldii

Taxonomy

Assessment Information

Geographic Range

Population

Habitat and Ecology

Threats

Conservation Actions

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Taxonomy [top]

Kingdom	Phylum	Class	Order	Family
PLANTAE	TRACHEOPHYTA	LILIOPSIDA	ARECALES	PALMAE

Scientific Name:	Ravenea dransfieldii
Species Authority:	Beentje

Assessment Information [top]

Red List Category & Criteria:

Endangered D ver 3.1

Year Published:

2012

Assessor/s:

Rakotoarinivo, M. & Dransfield, J.

Reviewer/s:

Baker, W.J. & Beentje, H.J.

Contributor/s:

Justification:
Known from eight widely separated sites between Ifanadiana and Marojejy, in the east of Madagascar. The extent of occurrence is well over 37,000 km², but the area of occupancy is 1,856 km², within the threshold for the Vulnerable category. Almost all of the known sites are located inside protected areas but those outside are highly threatened mainly because of habitat loss due to logging and agricultural expansion. The species is also targeted for its leaves which are used for thatching and weaving, this may involve felling the palms hence there is continuing decline in both the extant and quality of the habitat and in number of mature individuals. From the surveys conducted it is estimated that the population size numbers only about 200 mature individual,. hence although this species meets the requirements for a Vulnerable listing under the range criteria, the species is listed as Endangered based on the small population size.

History:

1998	–	Vulnerable
1997	–	Vulnerable (Walter and Gillett 1998)

Geographic Range [top]

Range Description:	Endemic to Madagascar occurring between Ifanadiana and Marojejy.
Countries:	Native: Madagascar
Range Map:	Click here to open the map viewer and explore range.

Population [top]

Population:	The population size from the eight known sites is estimated to number about 200 mature individuals and the population is decreasing.
Population Trend:	Decreasing

Habitat and Ecology [top]

Habitat and Ecology:	Occurs in moist lowland forest, on slight to steep slopes or hill crests. It has been recorded between 100 and 700 m.
Systems:	Terrestrial

Threats [top]

Major Threat(s):	The threats to this species include habitat loss through clearance for shifting agriculture and logging, and harvesting the species for its leaves.

Major Threat(s):

The threats to this species include habitat loss through clearance for shifting agriculture and logging, and harvesting the species for its leaves.

Conservation Actions [top]

Conservation Actions:	Protected in Marojejy, Masoala, Makira, Mananara Avaratra, Mangerivola and Betampona. Regulation and monitoring of the harvest may be required.

Conservation Actions:

Protected in Marojejy, Masoala, Makira, Mananara Avaratra, Mangerivola and Betampona. Regulation and monitoring of the harvest may be required.

Citation:	Rakotoarinivo, M. & Dransfield, J. 2012. Ravenea dransfieldii. In: IUCN 2012. IUCN Red List of Threatened Species. Version 2012.2. <www.iucnredlist.org>. Downloaded on 19 June 2013.
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