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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

UFS chemist invited by UNESCO to present lecture at World Science Forum in Budapest
2015-12-07

From the left are: Dr Jean-Paul Ngome Abiaga from UNESCO, France; Abdoulaye Ibrahim, also from UNESCO in France; and Truidie Venter, a young scientist from the Department of Chemistry at the UFS.
Photo: Supplied

Dr Truidie Venter, a young scientist from Inorganic Chemistry in the Department of Chemistry at the University of the Free State (UFS), returned recently from presenting a lecture at the 7th World Science Forum, held in Budapest, Hungary. She was one of the few young researchers world-wide who were invited to attend the forum.

In her capacity as a young female researcher from Africa, Truidie was invited by UNESCO to present her views on science in diplomacy at this event. Her talk focused on collaboration between researchers from different countries, and the challenges faced by young researchers in Africa, and served to initiate discussions between young researchers concerning international, interdisciplinary scientific cooperation.

The Science Forum, an international conference dedicated to science and knowledge, was held in Budapest from 4-7 November 2015. This interdisciplinary gathering is supported by the United Nations Educational, Scientific and Cultural Organization (UNESCO), the International Council for Science (ICSU), and other partners, and is aimed at providing an occasion for representatives of science, politics, international organisations, industrial and financial decision makers, international science forums, and science academies to meet and exchange views.

More than nine hundred delegates from 108 countries took part in this event. The speakers included Her Royal Majesty Princess Sumaya Bint El Hassan, President of the Royal Scientific Society of Jordan, Dr Irina Bokova, the Director-General of UNESCO, Prof Sir Peter Gluckman, first Chief Science Advisor to the Prime Minister of New Zealand, Prof Ene Ergma, former President of the Riigikogu (Estonian Parliament), and Ms Naledi Pandor, Minister of Science and Technology of South Africa.

At the conclusion of the forum, a declaration was accepted regarding the renewal of the scientific community’s commitment to the responsible and ethical use of scientific knowledge in addressing the grand challenges of humankind. This declaration addressed the headings of climate change, new sustainable development paths, disaster risk reduction, scientific advice for policies, international collaboration for capacity-building and mobilisation in the developing world, and balanced investment in science.

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