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08 September 2020 | Story Leonie Bolleurs | Photo Falko Buschke
Dr Falko Buschke says the iconic sandstone cliffs of the eastern Free State are key to protecting wild plants and animals from climate change.
The iconic sandstone cliffs of the eastern Free State are often the focus of paintings and postcards. Now, new research shows they also protect wild plants and animals from climate change. This finding is the outcome of a collaborative research effort by the University of the Free State (UFS); BirdLife South Africa; the Vrije Universiteit Brussel and KU Leuven, Belgium, which has recently been published in the journal Biological Conservation.

Mountains key for climate change mitigation

The study, led by Dr Falko Buschke from the Centre for Environmental Management UFS, used satellite data from NASA to track the ecological effects of wet and dry seasons, including the record drought of 2015/16. This showed how vegetation on the cool and moist mountain slopes was less affected by dry spells.

The complex physical terrain allows moisture to accumulate in the shaded parts of the south-facing slopes and ravines. This creates cool and moist habitats for plants and animals that wouldn’t survive in the rest of the hotter and drier landscape.

The team also discovered that these positive effects of mountains do not end at the foot of the mountain, but extend at least 500m into the flatter lowlands. “Presumably because water and nutrients accumulate in these surrounding buffers due to run-off,” says Dr Buschke.

Butterflies find safety on mountains

In addition to their high-tech analysis of the area, the team also relied on old-fashioned fieldwork to monitor butterflies over two years. “The data showed us how these insects find safety on mountains during harsh climate conditions and can then recolonise the rest of the landscape after conditions improve,” explains Dr Buschke. “This gives us clues on the best way to protect nature,” he adds. 

This study took place in the Rooiberge-Riemland Key Biodiversity Area (KBA), an area significant for maintaining global biodiversity. Several species of insects, reptiles, birds and mammals here occur nowhere else on earth. “If they disappear here, they will go extinct from the whole planet forever,” says Dr Falko Buschke. 

Despite its ecological significance, most of the area is covered by commercial farmland. So, the next stage of the project is exploring ways of protecting these important habitats while ensuring that farmers can continue producing food and supporting rural livelihoods. 

“Farmers hold the key to preserving biodiversity,” says Dr Buschke, “so conservation scientists need to work closely with them to ensure that we protect species for future generations.” 

News Archive

Researchers receive study grant for research into Congo Fever
2015-03-10

UFS researchers will be contributing significantly to the search for a vaccine against the deadly tick-borne disease known as Congo Fever.

Prof Felicity Burt from the Department of Medical Microbiology and Virology was recently awarded a research grant by the National Health Laboratory Service (NHLS) to study candidate vaccines for Crimean-Congo heamorrhagic fever (CCHF) virus and other arboviruses.

Arboviruses are viruses transmitted by mosquitoes, ticks, or other arthropods.

Prof Burt is an internationally-recognised expert on the Crimean-Congo haemorrhagic fever (CCHF). The Crimean-Congo haemorrhagic fever (CCHF) virus is a tick-borne virus that is associated with severe haemorrhagic disease in South Africa and other parts of Africa, Asia, and eastern Europe. Her interests focus on medically significant viruses that are transmitted by ticks and mosquitoes. Her research group is involved in determining the immune responses that are induced by different viral proteins.

Crimean-Congo haemorrhagic fever (CCHF) virus, a tick- borne virus found in Africa, Asia, the Balkans, and eastern Europe, causes severe viral haemorrhagic fever outbreaks.

Although a number of tick species are capable of becoming infected with CCHF virus, ticks of the genus Hyalomma, commonly referred to in SA as the “bont-legged ticks”, are the principal vector. The ticks have distinctive brown and white bands on their legs.

In February 1981, the first case of CCHF was recognised in South Africa (SA). To date, there have been nearly 200 cases of CCHF infection in SA with a 20% fatality rate. The majority of cases occurring in SA were in patients from the Northern Cape and Free State provinces.

“The funding that has been awarded will be used to profile immune responses against CCHF viral proteins, and investigate mechanisms and strategies to enhance these immune responses. We hope that the study will contribute knowledge towards the development of a vaccine against this medically significant virus.”

For more information or enquiries contact news@ufs.ac.za.

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