Dypsis nossibensis 


Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Liliopsida Arecales Palmae

Scientific Name: Dypsis nossibensis
Species Authority: (Becc.) Beentje & J.Dransf.
Chrysalidocarpus nossibensis Becc.
Vonitra loucoubensis Jum.
Vonitra nossibensis (Becc.) Perrier

Assessment Information [top]

Red List Category & Criteria: Critically Endangered B1ab(v)+2ab(v); C2a(i,ii); 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 a single area estimated to be 4 km² in extent (extent of occurrence and area of occupancy), the site is protected and used as a tourist attraction but exploitation of this species continues, with consequent reduction in the size of the population, now estimated to be fewer than 25 mature individuals. Based on this information, this species qualifies for listing as critically Endangered under three criteria.
Previously published Red List assessments:
1998 Critically Endangered (CR)
1998 Endangered (E)

Geographic Range [top]

Range Description: Endemic to Lokobe forest on Nosy Be island, northwest Madagascar.
Countries occurrence:
Estimated area of occupancy (AOO) - km2: 4
Number of Locations: 1
Lower elevation limit (metres): 10
Upper elevation limit (metres): 150
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population: Fewer than 25 individuals are recorded in Lokobe forest.
Current Population Trend: Decreasing
Additional data:
Number of mature individuals: 24 Continuing decline of mature individuals: Yes
Population severely fragmented: No
No. of subpopulations: 1 Continuing decline in subpopulations: No
Extreme fluctuations in subpopulations: No All individuals in one subpopulation: Yes

Habitat and Ecology [top]

Habitat and Ecology: A subcanopy palm of the humid forest of Lokobe, Nosy Be. The species occurs between 10 and 150 m elevation.
Systems: Terrestrial
Continuing decline in area, extent and/or quality of habitat: No

Use and Trade [top]

Use and Trade: The species is felled for planks.

Threats [top]

Major Threat(s): The species is cut down for its wood.

Conservation Actions [top]

Conservation Actions: Known only from Lokobe Special Reserve. Better control and monitoring of the harvesting of this species is required.

Classifications [top]

1. Forest -> 1.6. Forest - Subtropical/Tropical Moist Lowland
suitability: Suitable  
2. Land/water management -> 2.1. Site/area management
3. Species management -> 3.1. Species management -> 3.1.1. Harvest management

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Occur in at least one PA:Yes
  Percentage of population protected by PAs (0-100):91-100
In-Place Species Management
In-Place Education
5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.1. Intentional use: (subsistence/small scale)
♦ timing: Ongoing ♦ scope: Whole (>90%) ♦ severity: Slow, Significant Declines ⇒ Impact score: Medium Impact: 7 
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

3. Monitoring -> 3.1. Population trends
3. Monitoring -> 3.2. Harvest level trends

♦  Construction or structural materials
 Local : ✓ 

Bibliography [top]

Dransfield, J. and Beentje, H. 1995. The Palms of Madagascar. Royal Botanic Gardens Kew and The International Palm Society, Richmond.

IUCN. 2012. IUCN Red List of Threatened Species (ver. 2012.2). Available at: (Accessed: 17 October 2012).

Citation: Rakotoarinivo, M. & Dransfield, J. 2012. Dypsis nossibensis. The IUCN Red List of Threatened Species 2012: e.T38549A2876400. . Downloaded on 02 December 2015.
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