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Adansonia suarezensis 

Scope: Global
Language: English
Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_onStatus_cr_offStatus_ew_offStatus_ex_off

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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Malvales Malvaceae

Scientific Name: Adansonia suarezensis H.Perrier
Taxonomic Source(s): 1952. Notulae Systematicae. Herbier du Museum de Paris 14: 302–303.

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(i,ii,iii,iv,v)+2ab(i,ii,iii,iv,v) ver 3.1
Year Published: 2017
Date Assessed: 2015-12-18
Assessor(s): World Conservation Monitoring Centre
Reviewer(s): Faranirina, L. & Andriambololonera, S.
Contributor(s): Rabarimanarivo, M. & Manjato, N.
Facilitator/Compiler(s): Ravololomanana, N.
Justification:
Adansonia suarezensis has an extent of occurrence (EOO) of 209 km2 (within the limits for Endangered status under the criterion B2), an area of occupancy (AOO) just 72 km2 (within the limits for Endangered status under the criterion B2) and appears in four locations. Three subpopulations of this species occur outside protected areas and it is threatened by human intrusion, annual fire and forest exploitation. Three subpopulations present in Montagne des Français, Nosy Hara and Oronjia Protected Areas network. Recent study shows that A. suarezensis is vulnerable to climate change and more than half of his population occurs in the future in area that not suitable for the species. This scenario may conduct a loss of population more than 50% until 2080 (Baum 1995). Therefore this species is currently assessed as Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:The species is endemic to Madagascar, where it grows in Montagnes des Français, Beantely forest on W side of the Antsiranana to Cap d'Ambre road and Oronjia Diana region (Antsiaranana province) from sea level to 150 m asl (Baum 1995, Madagascar Catalogue 2016).
Countries occurrence:
Native:
Madagascar
Additional data:
Estimated area of occupancy (AOO) - km2:72Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:208.774
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:5
Upper elevation limit (metres):150
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are six known subpopulations of this species. The most recent collection was made in 2007 from Andavakoera, in Antsiranana province (Madagascar Catalogue 2016).
Current Population Trend:Decreasing
Additional data:
Continuing decline of mature individuals:Yes
Continuing decline in subpopulations:Yes

Habitat and Ecology [top]

Habitat and Ecology:This tree grows in dry forests on limestone, although small trees are also found in disturbed sublittoral scrub (Baum 1995, Madagascar Catalogue 2016).
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: There is no information on the use or trade of this species.

Threats [top]

Major Threat(s): The forest's proximity to a rapidly growing mining town leads to intensive wood and charcoal extraction, grazing and hunting. Subpopulations elsewhere are smaller, show few signs of regeneration and are threatened by the rapid depletion of the habitat through human intrusion, charcoal and timber production (Baum 1995, Madagascar Catalogue 2016).

Conservation Actions [top]

Conservation Actions: This species occurs in Montagne des Français, Nosy Hara and Oronjia Protected Areas. Three of the six subpopulations are protected (Baum 1995, Madagascar Catalogue 2016).

Classifications [top]

1. Forest -> 1.5. Forest - Subtropical/Tropical Dry
suitability:Suitable  
1. Land/water protection -> 1.2. Resource & habitat protection
3. Species management -> 3.4. Ex-situ conservation -> 3.4.2. Genome resource bank

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):41-50
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.1. Housing & urban areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality
  • 2. Species Stresses -> 2.2. Species disturbance

2. Agriculture & aquaculture -> 2.3. Livestock farming & ranching -> 2.3.4. Scale Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality
  • 2. Species Stresses -> 2.2. Species disturbance

5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.5. Motivation Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

7. Natural system modifications -> 7.1. Fire & fire suppression -> 7.1.3. Trend Unknown/Unrecorded
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation
  • 2. Species Stresses -> 2.1. Species mortality
  • 2. Species Stresses -> 2.2. Species disturbance

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.1. Unspecified species
♦ timing:Ongoing    

1. Research -> 1.2. Population size, distribution & trends
1. Research -> 1.3. Life history & ecology
1. Research -> 1.5. Threats
1. Research -> 1.6. Actions
2. Conservation Planning -> 2.1. Species Action/Recovery Plan

Bibliography [top]

Baum, D. 1995. A systematic revision of Adansonia (Bombacaceae). Annals of the Missouri Botanical Garden 82: 440-470.

Baum, D. 1997. Comments on a new population of Adansonia suarezensis found in Madagascar.

IUCN. 2017. The IUCN Red List of Threatened Species. Version 2017-3. Available at: www.iucnredlist.org. (Accessed: 7 December 2017).

Jenkins, M.D. (ed.) 1987. Madagascar. An environmental profile. IUCN/UNEP/WWF, Gland, Switzerland and Cambridge, UK.

Madagascar Catalogue. 2016. Adansonia suarezensis H. Perrier. St. Louis, U.S.A. and Antananarivo, Madagascar Available at: http://tropicos.org/NamePage.aspx?nameid=3900449&projectid=17.

Vieilledent, G., Cornu, C. , Sanchez, A. C., Leong Pock-Tsy, J-M, and Danthu, P. 2013. Vulnerability of baobab species to climate change and effectiveness of the protected area network in Madagascar: Towards new conservation priorities. Biological conservation 166: 11-22.


Citation: World Conservation Monitoring Centre. 2017. Adansonia suarezensis. The IUCN Red List of Threatened Species 2017: e.T30389A64366973. . Downloaded on 19 June 2018.
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