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Prof Aliza le Roux
Prof Aliza le Roux, Assistant Dean of the Faculty of Natural and Agricultural Sciences and Professor in the Department of Zoology and Entomology, at the Southern African Mountain Conference (SAMC2025).

Animals in mountainous areas around the world, in particular endangered, vulnerable, and near threatened mammals, are at risk of becoming roadkill as road networks expand further into these previously inaccessible terrains.

These mammals, which fall into the category of conservation risk according to the International Union for Conservation of Nature (IUCN) definitions, include African wild dogs (endangered), lions and leopards (both vulnerable), elephants (endangered), and honey badgers (NT – near threatened). Among the road-killed birds found in these areas are the hooded vulture (critically endangered) and the endangered steppe eagle.

This is according to Prof Aliza le Roux, Assistant Dean of the Faculty of Natural and Agricultural Sciences and Professor in the Department of Zoology and Entomology, who presented research during a session at the Southern African Mountain Conference (SAMC2025). Prof Le Roux, a behavioural ecologist studying how animals respond to risks and opportunities in the environment, did an oral presentation titled Patterns of wildlife-vehicle collision in montane environments during a session on Mountain biodiversity: animals.

The conference, under the patronage of UNESCO and organised by the University of the Free State (UFS) Afromontane Research Unit (ARU) – in partnership with the African Mountain Research Foundation (AMRF) and the Global Mountain Safeguard Research Programme (GLOMOS) – brought together researchers, policy makers, and practitioners from across Southern Africa and beyond. It delved into critical issues around mountain ecosystems, communities, governance, and transboundary cooperation.

For the research, Prof Le Roux, Dr Katlego Mashiane, Lecturer in the UFS Department of Geography, and Dr Clara Grilo from the BIOPOLIS project in Portugal, looked for published data/papers from 1971 to 2024, finding that most of the published literature on roadkill in Africa came from the 21st Century.

 

Heightens risks to wildlife

According to her, they found that amphibians were killed at the highest rate in the mountainous regions, while mammals were killed most frequently in the low-lying regions. Mammalian species classified as near threatened or more vulnerable to extinction on the IUCN Red List were most frequently found in the high-elevation mountains (7,7% of species killed in these areas), but also in low-lying areas (3,8% of mammalian roadkill). About 3% of the birds killed at moderate elevations were also of conservation concern.

“Increased vehicular traffic and better-paved roads in montane environments heighten the risks to wildlife inhabiting these regions, including the potential for more wildlife-vehicle collisions, leading to higher mortality rates. In terms of sheer numbers, many more small species (less than 1 kg in adult weight) are killed than larger species. This is probably because we either don’t see them or don’t care if we hit them. But we do care if our cars collide with something large like an eland – it does damage to us as well as them.”

“Unpredictable weather patterns and sudden topographical changes all contribute to these roads potentially being more hazardous for both drivers and any surrounding wildlife: the ruggedness of these terrains and tortuosity of roads can make it harder for drivers and wild animals to detect one another on mountain roads, increasing the likelihood of collisions,” writes Prof Le Roux and her colleagues.

The researchers estimated the roadkill rates for each observed species and then analysed the correlation with topographic aspects of the study sites. They used the 90m digital elevation model downloaded from the geospatial cloud-computing platform Google Earth Engine and classified ‘high’ elevation mountains as regions lying above 2 000 metres above sea level (masl), ‘moderate’ elevation mountains as lying between 1 500 and 2 000 masl, and ‘low’ regions as areas below 1 500 masl.

 

Limited data

Prof Le Roux and Dr Mashiane also extracted slope and the topographic ruggedness index. Roadkill rates were estimated for 15 different amphibian species, 98 reptilian, 261 avian, and 273 mammalian species, comprising 5 549 individual road kills.

“These findings indicate that roads in mountainous African regions pose a high risk to our indigenous wildlife. The accidents in mountainous areas are something to be aware of, as we are moving further into mountains where there is often vulnerable and unique biodiversity. When we do kill vertebrates through a collision, it is often a species that we would not find in low-lying areas.”

Unfortunately, Prof Le Roux says, they cannot say what the continental patterns are because so little data is available about biodiversity and roadkill patterns in the central and western parts of the continent. The data they found came from only 10 countries, and almost none of the studies took the form of systematic, longitudinal monitoring. The data sets were all ‘snapshots’ of roadkill in specific areas.

News Archive

UFS mourns the death of a great academic
2007-02-27

 

It is with great sadness that the management of the University of the Free State (UFS) heard of the death of Prof. Dawfré Roode.

Prof. Roode (70) was the first Registrar: Academics at the UFS. He retired in July 1997 and was living in Jeffrey’s Bay with his second wife, Daphne, for the past three years.

Prof Roode’s ties with the UFS stretch over more than fifty years. He registered at the UOFS in 1955 as first-year student and was elected as chairperson of the student representative council in 1958. He also represented the university on the cricket field and as Free State nineteen-year old in the Currie Cup. His academic career at the UOFS started in 1963 when he was appointed as lecturer in Sociology and Social Work. After completing his D Phil in 1964, he was promoted to senior lecturer in 1966. He became the first head of the Department of Sociology in 1972 and in 1989 he was appointed as Registrar: Academics and in 1989 Vice-Rector: Staff and Administration.

“Prof Roode brought professionalism to the administration that did not exist. He not only served the academe as registrar, but also established it as an important function within the UOFS. His ‘institutional memory’ about earlier decisions and events at the UOFS is also legendary,” said Prof Frederick Fourie, Rector and Vice-Chancellor at the UFS.

Prof Roode’s father, the late Prof Dawie Roode, was the first head of the Department of Music at the UFS. Prof Dawfré Roode had a love for music and was closely involved with the establishment of the Odeion String Quartet.

In October 2004 the university honoured him with a Centenary Medal for his outstanding leadership and contribution, as Registrar and Vice-Rector, to the development of the UFS by establishing and developing a strong and professional administrative structure at the UFS.

“Prof Roode left deep footprints at the UFS. I am glad that we could honour him for this in 2004 with a Centenary Medal before he passed away. He also attended the launch of the university’s history book earlier in February,” said Prof Fourie.

“Our sympathies go to Ms Trudie Roode (his first wife) and their three children Ms Frelet Roux and Gerda Daffue, and their son, Mr Dawie Roode. Prof Roode has left a gap in the hearts of the people who knew and worked with him at the UFS,” said Prof Fourie.

A memorial service will be held in Jeffrey’s Bay on Wednesday 28 February 2007 at 10:30. A memorial service will also be held in Bloemfontein on Wednesday 7 March 2007. More details will be made available at a later stage.
 

Media release
Issued by: Lacea Loader
Media Representative
Tel: 051 401 2584
Cell: 083 645 2454
E-mail: loaderl.stg@mail.uovs.ac.za
27 February 2007

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