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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 and Mexico forge links
2006-03-30

Some of the guests attending the signing of the memorandum of agreement were in front from the left Prof Wijnand Swart (Chairperson: Centre for Plant Health Management at the UFS), His Excellency Mauricio de Maria y Campos (Ambassador of Mexico in Southern Africa), Prof Magda Fourie (Vice-Rector: Academic Planning at the UFS) and Dr José Sergio Barrales Domínguez (Rector of the University of Chapingo in Mexico).
Photo: Stephen Collett

UFS and Mexico forge links
The Centre for Plant Health Management (CePHMa) in the Department of Plant Sciences at the University of the Free State (UFS) is presenting its first international conference.  The conference started yesterday and will run until tomorrow (Friday 31 March 2006) on the Main Campus in Bloemfontein. 

The conference is the first on cactus pear (or prickly pear) in South Africa since 1995.  It coincides with 2006 being declared as International Year of Deserts and Desertification by the United Nations General Assembly. 

During the opening session of the conference yesterday a memorandum of understanding (MOU) was signed between CePHMa and the University of Chapingo (Universidad Autonoma Chapingo) in Mexico.  The signing ceremony was attended by the Ambassador of Mexico in Southern Africa, His Excellency Mauricio de Maria y Campos, the Rector of the University of Chapingo, Dr José Sergio Barrales Domínguez, and the Vice-Rector: Academic Planning of the UFS, Prof Magda Fourie, amongst other important dignitaries. 

“South Africa and Mexico have a lot in common where agricultural practices in semi-arid areas and the role of the cactus pear are concerned,” said Prof Wijnand Swart, Chairperson of CePHMa at the opening of the conference.

He said that the MOU is the result of negotiations between CePHMa and the Ambassador of Mexico in Southern Africa over the past 12 months.

“The MOU facilitates the negotiation of international cooperative academic initiatives between the two institutions.  This entails the exchange of students and staff members of the UFS, curriculum development, research and community service,” said Prof Swart.

“During the next two days, various areas of interest will be discussed.  This includes perspectives from commercial cactus pear farmers in South Africa, the health management of cactus pear orchards, selection of new cultivars of cactus pear, and the nutritional and medicinal value of the crop,” said Prof Swart.

In his welcoming message Prof Swart explained that in recent years there has been increased interest in the cactus pear for the important role it can play in sustainable agricultural systems in marginal areas of the world.  These plants have developed phenological and physiological adaptations to sustain their development in adverse environments. 

“The cactus pear can serve as a life saving crop to both humans and animals living in marginal regions by providing a highly digestible source of energy, water, minerals and protein,” said Prof Swart. 

“In an age when global warming and its negative impact on earth’s climate has become an everyday subject of discussion, the exploitation of salt and drought tolerant crops will undoubtedly have many socio-economic benefits to communities inhabiting semi-arid regions,” said Prof Swart.

“Plantations of cactus pear grown for fruit, forage and vegetable production, as well as for natural red dye produced from the cactus scale insect known as cochineal have, over the last two decades, been established in many countries in South America, Europe, Asia and Africa.  The crop and its products have not only become important in international markets, but also in local markets across the globe,” said Prof Swart. 

Detailed discussions on the implementation of the MOU will take place between CePHMa and the University of Chapingo after the conference. 

Media release
Issued by: Lacea Loader
Media Representative
Tel:   (051) 401-2584
Cell:  083 645 2454
E-mail:  loaderl.stg@mail.uovs.ac.za
30 March 2006

 

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