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Olea chimanimani 

Scope: Global
Language: English
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Taxonomy [top]

Kingdom Phylum Class Order Family
Plantae Tracheophyta Magnoliopsida Scrophulariales Oleaceae

Scientific Name: Olea chimanimani
Species Authority: Kupicha

Assessment Information [top]

Red List Category & Criteria: Least Concern ver 3.1
Year Published: 2017
Date Assessed: 2015-06-04
Assessor(s): Darbyshire, I., Timberlake, J., Mapaura, A., Chelene, I. & Hadj-Hammou, J.
Reviewer(s): Burrows, J.E. & Hilton-Taylor, C.
Justification:
Although  it has a very limited range, being restricted to the sandstone/quartzite outcrops of the Chimanimani massif, this species is locally frequent amongst large boulders and there are no obvious threats. The entirety of its range and habitat is under legal protection for conservation, and although protection is less effective on the Mozambique side of the Trans-Frontier Conservation Area, human activity within the National Reserve does not impact upon this species or its habitat. It is therefore assessed as Least Concern (LC) as it is unthreatened as human activity does not increase significantly in the area. That said, if human activity were to increase within the TFCA, this species could quickly become globally threatened. In the longer term, climate change may pose a threat to this species hence regular monitoring is required to determine if there are indications of population decline or range shift.

In the national plant Red List of Mozambique, Izidine and Bandeira (2002) recorded this species as Data Deficient, but we now have sufficient information to confidently provide a full global assessment.
Previously published Red List assessments:

Geographic Range [top]

Range Description:Olea chimanimani is known only from the Chimanimani Mountains on the Zimbabwe-Mozambique border, with an extent of occurrence (EOO) of 85 km² and an area of occupancy (AOO) of 24 km² based on known occurrence data. The total area of Chimanimani sandstone/quartzite is approximately 380 km². Of this, the area that is covered by craggy quartzite and associated grassland, the habitat favoured by this species, is approximately 270 km²; this could be taken as the maximum possible AOO for this species. Wild 8009, recorded as being from Shurugwi on the Great Dyke of Zimbabwe, is excluded from this range as this is almost certainly either a misidentification or incorrect label data.
Countries occurrence:
Native:
Mozambique; Zimbabwe
Additional data:
Estimated area of occupancy (AOO) - km2:24-270Continuing decline in area of occupancy (AOO):No
Extreme fluctuations in area of occupancy (AOO):NoEstimated extent of occurrence (EOO) - km2:85
Continuing decline in extent of occurrence (EOO):NoExtreme fluctuations in extent of occurrence (EOO):No
Lower elevation limit (metres):1270
Upper elevation limit (metres):1720
Range Map:Click here to open the map viewer and explore range.

Population [top]

Population:

No quantitative population data are available for this species. It is known from 12 collections and has been recorded as scattered to locally common within its range.

Current Population Trend:Stable
Additional data:

Habitat and Ecology [top]

Habitat and Ecology:This shrub or small tree occurs among quartzite boulders and crags and among rocky upland bushland; growing at 1,270-1,720 m altitude.
Systems:Terrestrial
Continuing decline in area, extent and/or quality of habitat:No

Threats [top]

Major Threat(s): Although woody, this species does not appear to grow to a large enough size to be harvested for fuelwood by the mining communities in the Chimanimani highlands. The open woodlands on the Mozambique side of the Chimanimani massif are prone to increased frequency of burning by humans associated with the illegal artisanal mining activity within the National Reserve, but these fires do not impact significantly upon the rocky areas where this species is still frequent. Whether this species occurred more frequently in the open woodlands in the past under lower fire frequency is unclear but, based on current evidence, fire is not considered to be a threat. Olea chimanimani is therefore considered to be unthreatened at present.

Conservation Actions [top]

Conservation Actions:

No specific conservation measures or management plan are in place for this species. It is recorded from the Chimanimani National Park in Zimbabwe and the Chimanimani National Reserve in Mozambique.


Citation: Darbyshire, I., Timberlake, J., Mapaura, A., Chelene, I. & Hadj-Hammou, J. 2017. Olea chimanimani. The IUCN Red List of Threatened Species 2017: e.T32139A66151084. . Downloaded on 25 June 2017.
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