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05 June 2018 Photo Supplied
Digging up truth South Africa was way different to what you thought
Archaeological excavations in the Wonderwerk Cave, north of Kuruman in the Northern Cape.

Research fellow Dr Lloyd Rossouw from the Department of Plant Sciences at the University of the Free State (UFS) recently published an article in the Nature Ecology and Evolution journal with Dr Michaela Ecker from the University of Toronto as lead author, and Dr James Brink, research fellow at the UFS Centre for Environmental Management. The findings described in “The palaeoecological context of the Oldowan-Acheulean in southern Africa” provides the first extensive paleoenvironmental sequence for the interior of southern Africa by applying a combination of methods for environmental reconstruction at Wonderwerk Cave, which have yielded multiple evidence of early human occupation dating back almost two million years ago.

Where water once was
The Wonderwerk Cave is found north of the Kuruman hills (situated in Northern Cape) a 140m long tube with a low ceiling. The surroundings are harsh. Semi-arid conditions allow for the survival of only hardy bushes, trees, and grasses. But during the Early Pleistocene, stepping out of the Wonderwerk Cave you would have been greeted by a completely different site, the researchers found. Using carbon and oxygen stable isotope analysis on the teeth of herbivores (Dr Ecker), fossil faunal abundance (Dr Brink), as well as the analysis of microscopic plant silica remains (phytoliths) excavated from fossil soils inside the cave (Dr Rossouw), the results show that ancient environments in the central interior of southern Africa were significantly wetter and housed a plant community unlike any other in the modern African savanna. 

What difference does it make?
While East African research shows increasing aridity and the spread of summer-rainfall grasslands more than a million years ago, the results from this study indicate an interesting twist. During the same period, shifts in rainfall seasonality allowed for alternating summer and winter-rainfall grass occurrences coupled with prolonged wetlands, that remained major components of Early Pleistocene (more or less the period between one and two million years ago) environments in the central interior of southern Africa. That means our human ancestors were also living and evolving in environments other than the generally accepted open, arid grassland model.

News Archive

Three minutes for research
2015-09-07

When you have only three minutes in which to explain an 80 000-word thesis, every second counts. This is what researchers from across the country realised during the first national round of South Africa’s Three-minute thesis competition.

The University of the Free State (UFS) Postgraduate School hosted this international competition on the Bloemfontein Campus, where master’s and doctoral students from 12 universities participated. During the competition, each researcher had to give a presentation on his/her research within three minutes.

Dr Henriette van den Berg, Director of the UFS’s Postgraduate School, and presenter of the two-day competition, said the competition is the ideal platform to teach researchers how to become effective research communicators.

“It is important that researchers should learn to communicate the essence of their research to audiences that aren’t necessarily specialists in the field. They should also be able to emphasise how their research contributes to the success and well-being of communities. Researchers often have to explain to persons who aren’t specialists in their specific research area the reasons why it is important to fund the research, for example, or during a work interview. They should be able to convey the essence of their research effectively in a very short time.”

The 3MT competition, which originated at the University of Queensland in Australia, has in 2010 developed into an international trend since its inception. Currently, the 3MT is presented in Australia, the USA, and the UK.

For the competition, participants are given just three minutes to explain their research. In this time, they have to explain the problem and the methodology, as well as why this research is important. Participants are allowed to make use of only one piece of static imaging material for support.

A panel of judges from the participating universities were selected to assess each presentation, based on how well participants expressed themselves in such a short time, and on their choice of imagery.

Gavin Robinson from the University of Johannesburg, Cameron McIntosh, and Ingrid Alleman, both from the UFS, were the respective winners in the categories for doctoral and master’s students.

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