| IUCN Species Information Service (SIS) Toolkit |
| Assessment Report | |
| Taxonomy | ||||
|---|---|---|---|---|
| Kingdom | Phylum | Class | Order | Family |
| PLANTAE | TRACHEOPHYTA | LILIOPSIDA | ASPARAGALES | ORCHIDACEAE |
| Scientific Name: | Disa intermedia |
| Species Authority: | H.P.Linder |
| Common Name/s: - | |
| Synonym/s: | - |
| Taxonomic Notes: | - |
| Assessment Information | |
|---|---|
| Red List Category & Criteria: | Vulnerable B1ab(i,ii,iii)+2ab(i,ii,iii); D2 |
| Year Assessed: | - |
| Assessor/s: | Braun, K. |
| Reviewer/s: | |
| Contributor/s: | |
| Facilitator/s: | |
| Institutions/s: | |
| Justification: Disa intermedia is only known from a very limited distribution range, with an area of occupancy of about 28 km2. The estimated extent of occurrence was smaller than the area of occupancy, so the area of occupancy has been used for the extent of occurrence. The majority of the population occurs in an area with ongoing rapid development for agriculture and other forms of land use, and the remaining grassland areas are heavily grazed by livestock. This plant has therefore been assessed as Vulnerable under Criterion B1, B2 and D2. Date last seen: 2018 | |
| History: | - |
| Geographic Range | |
|---|---|
| Range Description: | This species is only known from the Eswatini highveld in an area extending from Hawane extending north north east into Malolotja Nature Reserve. |
| Countries: | Native: Eswatini; |
| Population | |
|---|---|
| Population: | No detailed population surveys have been conducted for this species, so any population information is based on specimen label information or data provided with the observation. It has been recorded from three localities within Malolotja Nature Reserve, and about five localities in the Hawane/Forbes Reef area. For the purposes of this assessment, it has been assumed that the plant still occurs in the localities described on the older records. The flowering of this species might be dependent on the fire regime, and if not in flower, this plant is not easily located, so it is possible that it is still present in these areas. |
| Population Trend: | Unknown |
| Habitat and Ecology | |
|---|---|
| Habitat and Ecology: | This plant is known from open sourveld grassland areas. The entire distribution falls within vegetation type KaNgwane Montane Grassland (Gm16) (Mucina et. al. 2018). The species is found on shallow soils in well-drained localities. |
| List of Habitats: | 4 Grassland 4.7 Grassland - Subtropical/Tropical High Altitude |
| Threats | |
|---|---|
| Major Threat(s): | Although some of the known localities for this plant fall within a protected area, most of the distribution is in the Hawane/Forbes Reef area, where significant levels of land use change have been observed. This has included more and more buildings, and various forms of agriculture. Most of the area outside of Malolotja Nature Reserve is also subject to heavy grazing. |
| List of Threats: | 2 Agriculture & aquaculture 2.1 Annual & perennial non-timber crops 2.1.2 Small-holder farming 2.3 Livestock farming & ranching 2.3.2 Small-holder grazing, ranching or farming |
| Conservation Actions | |
|---|---|
| Conservation Actions: | Part of the distribution of this species falls within Malolotja Nature Reserve, providing at least some measure of protection for this plant. |
| List of Conservation Actions: | 3 Species management 3.4 Ex-situ conservation 3.4.2 Genome resource bank |
| Bibliography | |
|---|---|
| Bachman
S, Moat J, Hill AW, de la Torre J, Scott B. 2011. Supporting Red List
threat assessments with GeoCAT geospatial conservation tool. In: Smith
V, Penev L (Eds) e-Infrastructure for data publishing in biodiversity
science. . ZooKeys 150: 117-126. Mucina, L., Rutherford, M.C. and Powrie, L.W. (Editors). 2018. The Vegetation Map of South Africa, Lesotho and Swaziland. South African National Biodiversity Institute. Available at: http://bgis.sanbi.org/Projects/Detail/186. | |
| Citation: | - |