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Euphorbia robivelonae 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Malpighiales Euphorbiaceae

Scientific Name: Euphorbia robivelonae Rauh
Taxonomic Source(s): 1994. Succulentes (France) . 1: 9.

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: 2015-02-10
Assessor(s): Haevermans, T.
Reviewer(s): Rabarimanarivo, M., Manjato, N. & Phillipson, P.
Justification:
The species has an estimated extent of occurrence of 50 km² and an area of occupancy of 27 km². It is present in three locations. All subpopulations occur outside protected area network and the species experiences continuing decline due to nomadic grazing and other agricultural activities, wild fire and urban development. It is therefore assessed as Endangered.
Previously published Red List assessments:

Geographic Range [top]

Range Description:This species is endemic to Madagascar where it is known from a few forest patches between Vohemar and Sambava, in north-east Madagascar (Antsiranana Province, SAVA Region) between 60 to 100 m asl. (Madagascar Catalogue, 2016; Rauh, 2004).
Countries occurrence:
Native:
Madagascar
Additional data:
Estimated area of occupancy (AOO) - km2:27Continuing decline in area of occupancy (AOO):Yes
Estimated extent of occurrence (EOO) - km2:50
Continuing decline in extent of occurrence (EOO):Yes
Number of Locations:3
Lower elevation limit (metres):60
Upper elevation limit (metres):100
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:There are three confirmed subpopulations of this species, and it was most recently collected  in 2001 at Fanambana Forest (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 shrub grows on the rocky banks of rivers. (Madagascar Catalogue, 2016; Rauh, 2004)
Systems:Terrestrial; Freshwater
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):

All subpopulations occur outside protected areas and are threatened by habitat degradation and destruction through soil erosion and sedimentation due to nomadic grazing and other agricultural activities, wild fire and urban development.

Conservation Actions [top]

Conservation Actions: This species is not present in any protected areas. No conservation actions for the species are known. It is included in Appendix II of CITES.

Citation: Haevermans, T. 2017. Euphorbia robivelonae. The IUCN Red List of Threatened Species 2017: e.T44439A88490731. . Downloaded on 16 December 2017.
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