Aloe integra

Taxonomy
Scientific Name
Aloe integra Reynolds
Higher Classification
Monocotyledons
Family
ASPHODELACEAE
National Status
Status and Criteria
Vulnerable B1ab(ii,iii,iv,v)
Assessment Date
2009/08/13
Assessor(s)
M. Lötter, J.E. Burrows, S. Krynauw & J.E. Victor
Justification
EOO 10 200 km², known from seven locations. At least 40% of its habitat has been lost to pine plantations. The isolation and fragmentation of grasslands by pine plantations have resulted in the loss of pollinators and changed herbivore foraging dynamics that now threaten this species' survival. A continuing decline due to too frequent fire and expanding timber plantations has been recorded.
Distribution
Endemism
Not endemic to South Africa
Provincial distribution
Mpumalanga
Range
Mpumalanga, from Vaalhoek north of Pilgrim's Rest southwards to Amsterdam. Also at Mankayane in Swaziland.
Habitat and Ecology
Major system
Terrestrial
Major habitats
Barberton Montane Grassland, Lydenburg Montane Grassland, KaNgwane Montane Grassland
Description
Dry highveld grassland, on exposed, rocky sites with short grass on north- and northwest-facing slopes.
Threats
About 40% of the grassland habitat of A. integra has been transformed to timber plantations in the last 100 years. While not many plantations are actively expanding at present, one site out of seven known is currently threatened by expanding pine plantations. This site is 500 m past Gogosha River, second crossing on the Amsterdam/Swaziland border road. Dense stands of alien acacias have invaded the southern slopes of the hills near Amsterdam where A. integra is found, and is spreading onto the north-facing slopes where a fairly large colony of A. integra grows (Craib 2005). This site is at present still a fairly healthy population with good recruitment as pollinators (sunbirds) are still present and natural fire cycles are maintained (Craib 2005). In the mountains around Badplaas, however, timber plantations have led to the fragmentation and isolation of subpopulations into small patches of remnant grasslands. Recruitment in these subpopulations are generally very poor. Much of the remaining grasslands serve as fire breaks and are burnt on an annual basis, which prevents the establishment of young seedlings. Pollinators have also disappeared from many small fragments and consequently seed set is very poor. Small populations are also subjected to severe damage by native antelope and baboons. These animals are forced to forage on the aloes after most of the grassland fragments have been burnt as the extensive pine plantations have replaced most of their former habitat and forage areas as well. Field observations during 2004 by Craib (Craib 2005) found that most flower buds had been destroyed by baboons.
Population
Population trend
Decreasing
Assessment History
Taxon assessed
Status and Criteria
Citation/Red List version
Aloe integra ReynoldsVU B1ab(ii,iii,iv,v)Raimondo et al. (2009)
Aloe integra ReynoldsNot Threatened Hilton-Taylor (1996)
Bibliography

Craib, C. 2005. Grass Aloes in the South African Veld. Umdaus Press, Hatfield.


Hilton-Taylor, C. 1996. Red data list of southern African plants. Strelitzia 4. South African National Botanical Institute, Pretoria.


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


Van Wyk, B.-E. and Smith, G. 2003. Guide to aloes of South Africa. (2nd ed.). Briza Publications, Pretoria.


Citation
Lötter, M., Burrows, J.E., Krynauw, S. & Victor, J.E. 2009. Aloe integra Reynolds. National Assessment: Red List of South African Plants version 2017.1. Accessed on 2018/12/14

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Distribution map

© M. Lötter

© Mpumalanga Parks and Tourism Agency (M.T.P.A.)


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