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Albizia suluensis 

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 Fabales Fabaceae

Scientific Name: Albizia suluensis Gerstner
Common Name(s):
English Zulu Albizia
Taxonomic Notes: TSP

Assessment Information [top]

Red List Category & Criteria: Endangered B1ab(ii,iii,v)+2ab(ii,iii,v); C2a(ii) ver 3.1
Year Published: 2014
Date Assessed: 2011-06-13
Assessor(s): Scott-Shaw, C.R., Victor, J.E., von Staden, L. & van Wyk, A.E.
Reviewer(s): Raimondo, D.
Justification:
Trees occur as one large continuous subpopulation (extent of occurrence (EOO) is 330-400 km²), but there are two locations: the portion of the subpopulation that is protected inside the Hluhluwe Game Reserve, and the trees in forest patches outside the reserve, that are all impacted on by harvesting for firewood, building materials and medicine. Population estimated to be 1,000-2,500 mature individuals and is declining. It is listed as Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to South Africa, occurring in KwaZulu-Natal from Hlabisa to Hluhluwe.
Countries occurrence:
Native:
South Africa (KwaZulu-Natal)
Additional data:
Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:330-400
Number of Locations:2
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:All the trees in the various forest patches are considered to be a single subpopulation, as these areas are interconnected and gene flow by means of pollination and seed dispersal is possible. There are two locations: the portion of the population that is protected inside the reserve, and the trees in forest patches outside the reserve, that are all impacted on by harvesting for firewood, building materials and medicine (C.R. Scott-Shaw pers. comm. 2007). The remaining population is estimated to number between 1,000 and 2,500 mature individuals, and severe declines have been observed through monitoring.
Current Population Trend:Decreasing
Additional data:
Number of mature individuals:1000-2499Continuing decline of mature individuals:Yes
No. of subpopulations:1
All individuals in one subpopulation:Yes

Habitat and Ecology [top]

Habitat and Ecology:A tree found in scarp forest, riverine thicket and open woodland, often along streams, usually along the upper altitudinal perimeter and on steep slopes.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:Yes

Use and Trade [top]

Use and Trade: The bark is harvested for medicinal use.

Threats [top]

Major Threat(s): This species occurs in a densely populated rural area, where dependence on natural resources is high. Trees are harvested outside the Hluhluwe-Umfolozi Game Reserve for firewood and building materials, and the forests are also being cleared for subsistence farming (C.R. Scott-Shaw pers. comm.). According to Gerstner (1947), the bark is harvested for medicinal use. Much of the area is also heavily invaded by Chromolaena.

Conservation Actions [top]

Conservation Actions: This species occurs within the Hluhluwe-Umfolozi Game Reserve. Assessed as 'V' in 1996 (Hilton-Taylor 1996), 'VU' (A1c, B1B2abcde, C1C2a, D1D2) in 1999 (Scott-Shaw 1999) and 'EN' (B1ab(ii,iii,v)+2ab(ii,iii,v); C2a(ii)) in 2009 (Raimondo et al. 2009).

Classifications [top]

1. Forest -> 1.5. Forest - Subtropical/Tropical Dry
suitability:Suitable  
1. Land/water protection -> 1.1. Site/area protection
1. Land/water protection -> 1.2. Resource & habitat protection

In-Place Research, Monitoring and Planning
In-Place Land/Water Protection and Management
  Conservation sites identified:Yes, over part of range
  Occur in at least one PA:Yes
In-Place Species Management
In-Place Education
1. Residential & commercial development -> 1.1. Housing & urban areas
♦ timing:Ongoing  ♦ severity:Rapid Declines  
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

1. Residential & commercial development -> 1.3. Tourism & recreation areas
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

2. Agriculture & aquaculture -> 2.1. Annual & perennial non-timber crops -> 2.1.4. Scale Unknown/Unrecorded
♦ timing:Ongoing ♦ scope:Majority (50-90%) ♦ severity:Rapid Declines ⇒ Impact score:Medium Impact: 7 
→ Stresses
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation

5. Biological resource use -> 5.2. Gathering terrestrial plants -> 5.2.1. Intentional use (species is the target)
♦ timing:Ongoing    
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality
  • 2. Species Stresses -> 2.2. Species disturbance

5. Biological resource use -> 5.3. Logging & wood harvesting -> 5.3.1. Intentional use: (subsistence/small scale) [harvest]
♦ timing:Ongoing ♦ scope:Whole (>90%) ♦ severity:Rapid Declines ⇒ Impact score:High Impact: 8 
→ Stresses
  • 2. Species Stresses -> 2.1. Species mortality

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

8. Invasive and other problematic species, genes & diseases -> 8.1. Invasive non-native/alien species/diseases -> 8.1.2. Named species [ Chromolaena odorata ]
♦ timing:Ongoing    
→ Stresses
  • 1. Ecosystem stresses -> 1.1. Ecosystem conversion
  • 1. Ecosystem stresses -> 1.2. Ecosystem degradation


♦  Medicine - human & veterinary
 Local : ✓ 

Bibliography [top]

Gerstner, J. 1947. Albizia suluensis. Journal of South African Botany 13: 62-64.

Hilton-Taylor, C. (ed.). 1996. Red Data List of Southern African Plants. Strelitzia 4. National Botanical Institute, Pretoria.

IUCN. 2014. The IUCN Red List of Threatened Species. Version 2014.3. Available at: www.iucnredlist.org. (Accessed: 13 November 2014).

Raimondo, D., von Staden, L., Foden, W., Victor, J.E., Helme, N.A., Turner, R.C., Kamundi, D.A. and Manyama, P.A. (eds). 2009. Red List of South African Plants. Strelitzia 25. South African National Biodiversity Institute, Pretoria.

Scott-Shaw, C.R., Victor, J.E., von Staden, L. and van Wyk, A.E. 2011. Albizia suluensis Gerstner.National Assessment: Red List of South African Plants version 2011.1. Available at: Accessed on 2012/02/10.


Citation: Scott-Shaw, C.R., Victor, J.E., von Staden, L. & van Wyk, A.E. 2014. Albizia suluensis. The IUCN Red List of Threatened Species 2014: e.T30340A47609023. . Downloaded on 20 June 2018.
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