Map_thumbnail_large_font

Cadaba insularis

Status_ne_offStatus_dd_offStatus_lc_offStatus_nt_offStatus_vu_offStatus_en_offStatus_cr_onStatus_ew_offStatus_ex_off

Taxonomy [top]

Kingdom Phylum Class Order Family
PLANTAE TRACHEOPHYTA MAGNOLIOPSIDA CAPPARALES CAPPARACEAE

Scientific Name: Cadaba insularis
Species Authority: A.G.Mill.

Assessment Information [top]

Red List Category & Criteria: Critically Endangered A2acd; B2ab(iii) ver 3.1
Year Published: 2004
Date Assessed: 2004-04-30
Assessor/s: Miller, A.
Reviewer/s: Abuzinada, A.H. & AL-Eisawi, D.M.H. (Arabian Plants Red List Authority)
Justification:
This small tree is only known from two, widely separated locations: at one a survey revealed about ten scattered individuals and at the other (admittedly poorly explored) location only a solitary tree was seen. At the first site, local informants say that considerable numbers of trees were lopped to provide fodder during recent droughts. The tree is not considered to provide particularly good browse (cf. Dendrosicyos socotranus), and it is a reflection of the severity of the droughts in the east of the island that it has been so drastically reduced in numbers. No regeneration has been observed at either location which strongly suggests a decline in the quality of the habitat. Cadaba sp. A. is representative of a group of plants on Soqotra which are threatened by over-exploitation. This is not so much through any change in traditional livestock management practices but because of: (1) the recent building boom as herding families move out of their traditional cave settlements and start to build houses - the need for timber has meant that many trees which formerly provided fodder for livestock in times of drought have had to be replaced by less suitable trees such as Cadaba sp. A. and (2) the strain placed on the rangeland by the recent periods of severe drought on the islands; during the period of good rains which preceded the years of drought, livestock numbers rose dramatically and, thus, when the period of drought struck there were large numbers of animals to be hand fed; in 1999 the summer rains failed all over the archipelago (an unprecedented occurrence for the islanders) and the rangeland – and particularly browse species – came under maximal pressure, both from the livestock themselves and from their owners who ranged far and wide in search of any greenery with which to feed their starving animals (even to the extent of lowering themselves down cliff faces on ropes). The IUCN listing is based on a suspected population reduction of over 80% based on past and projected levels of exploitation.

Geographic Range [top]

Range Description: Endemic to Soqotra.
Countries:
Native:
Yemen (Socotra)
Range Map: Click here to open the map viewer and explore range.

Population [top]

Population Trend: Decreasing

Habitat and Ecology [top]

Habitat and Ecology: Rare in open dwarf shrubland (Zahr) and degraded succulent shrubland (Killisan) in two widely separated locations. Altitude of 100–350 m.

Gnarled tree with fleshy dark green leaves and fissured bark. Flowers and fruits at the end of the winter and beginning of summer.
Systems: Terrestrial
Citation: Miller, A. 2004. Cadaba insularis. In: IUCN 2013. IUCN Red List of Threatened Species. Version 2013.2. <www.iucnredlist.org>. Downloaded on 23 April 2014.
Disclaimer: To make use of this information, please check the <Terms of Use>.
Feedback: If you see any errors or have any questions or suggestions on what is shown on this page, please fill in the feedback form so that we can correct or extend the information provided