Author
Listed:
- Kim Canavan
(Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, Makhanda 6140, South Africa)
- Susan Canavan
(Department of Invasion Ecology, Institute of Botany, Czech Academy of Sciences, 25243 Průhonice, Czech Republic)
- Vincent Ralph Clark
(Afromontane Research Unit and Department of Geography, University of the Free State, Phuthaditjhaba 9866, South Africa)
- Onalenna Gwate
(Afromontane Research Unit and Department of Geography, University of the Free State, Phuthaditjhaba 9866, South Africa)
- David Mark Richardson
(Centre for Invasion Biology, Department of Botany and Zoology, Stellenbosch University, Stellenbosch 7600, South Africa)
- Guy Frederick Sutton
(Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, Makhanda 6140, South Africa)
- Grant Douglas Martin
(Centre for Biological Control, Department of Zoology and Entomology, Rhodes University, Makhanda 6140, South Africa
Afromontane Research Unit and Department Zoology and Entomology, University of the Free State, Phuthaditjhaba 9866, South Africa)
Abstract
The six major mountain ranges in South Africa support critically important ecosystem services—notably water production—and are rich in biodiversity and endemism. These mountains are threatened by detrimental land uses, unsustainable use of natural resources, climate change, and invasive alien plants. Invasive alien plants pose substantial and rapidly increasing problems in mountainous areas worldwide. However, little is known about the extent of plant invasions in the mountains of South Africa. This study assessed the status of alien plants in South African mountains by determining sampling efforts, species compositions and abundances across the six ranges in lower-and higher-elevation areas. Species occurrence records were obtained from three databases that used various approaches (roadside surveys, citizen science observations, focused botanical surveys). Most mountain ranges were found to be undersampled, and species composition assessments were only possible for two ranges. The majority of abundant alien plants in both the lower- and higher-elevation areas were species with broad ecological tolerances and characterised by long distance seed dispersal. These prevalent species were mostly woody plants—particularly tree species in the genera Acacia, Pinus , and Prosopis —that are contributing to the trend of woody plant encroachment across South African mountains. We suggest improved mountain-specific surveys to create a database which could be used to develop management strategies appropriate for each mountain range.
Suggested Citation
Kim Canavan & Susan Canavan & Vincent Ralph Clark & Onalenna Gwate & David Mark Richardson & Guy Frederick Sutton & Grant Douglas Martin, 2021.
"The Alien Plants That Threaten South Africa’s Mountain Ecosystems,"
Land, MDPI, vol. 10(12), pages 1-19, December.
Handle:
RePEc:gam:jlands:v:10:y:2021:i:12:p:1393-:d:704022
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Citations
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Cited by:
- Simone Iacopino & Carlo Piazzi & Julius Opio & Deus Kamunyu Muhwezi & Efrem Ferrari & Filippo Caporale & Tommaso Sitzia, 2022.
"Tourist Agroforestry Landscape from the Perception of Local Communities: A Case Study of Rwenzori, Uganda,"
Land, MDPI, vol. 11(5), pages 1-16, April.
- Robert A. Marchant & Aida Cuni-Sanchez, 2022.
"Special Issue Editorial: Mountains under Pressure,"
Land, MDPI, vol. 11(8), pages 1-5, August.
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