Ravenea dransfieldii 


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
Date Assessed: 2010-12-17
Assessor(s): Rakotoarinivo, M. & Dransfield, J.
Reviewer(s): Baker, W.J., Beentje, H.J. & Bachman, S., Baker, W.J. & Beentje, H.J.
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.
Previously published Red List assessments:
1998 Vulnerable (VU)
1998 Vulnerable (V)

Geographic Range [top]

Range Description: Endemic to Madagascar occurring between Ifanadiana and Marojejy.
Countries occurrence:
Estimated area of occupancy (AOO) - km2: 1856
Number of Locations: 8
Lower elevation limit (metres): 100
Upper elevation limit (metres): 700
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.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 200 Continuing decline of mature individuals: Yes
Population severely fragmented: Yes

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
Continuing decline in area, extent and/or quality of habitat: Yes

Use and Trade [top]

Use and Trade: The leaves of this species are used for thatching and weaving.

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.

Conservation Actions [top]

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. The IUCN Red List of Threatened Species 2012: e.T38665A2881985. . Downloaded on 30 November 2015.
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