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18 June 2019 | Story Leonie Bolleurs | Photo Leonie Bolleurs
Dr Christine Engelbrecht from the Agricultural Research Council
Dr Christine Engelbrecht from the Agricultural Research Council presented the keynote lecture on climate dynamics, predicting that El Niños will double in frequency towards the end of the century.

The world will need nearly double the current food supply by 2050 to feed an ever-increasing world population. This is a mammoth, almost impossible task.

Building on knowledge

According to UFS Rector and Vice-Chancellor, Prof Francis Petersen, if we approach challenges such as these with scientific level-headedness, systematically build on knowledge and experience gained, and draw on similar inputs from other specialist fields, the seemingly impossible becomes possible.

“To what extent do we integrate our knowledge across sectors – within the university and outside the university; on the continent as well as globally?” he asked the 300-plus delegates, which included animal scientists, students, and various other role players in the livestock sector, at the 51st South African Society of Animal Science (SASAS) congress on the Bloemfontein Campus of the University of the Free State (UFS). 

Willingness to adapt to new strategies


The theme of this year’s congress was: Managing the ecological footprint of livestock through efficient production. The congress provided a platform for discussions on the impact of livestock production – bringing in elements of critical thinking, as well as the willingness to adopt new strategies. 

During the congress, workshops on topics such as silage, predation management, intensive sheep production, prickly-pear utilisation, and animal welfare provided delegates with the opportunity to discuss challenges faced by the South African livestock producer.

Dr Christine Engelbrecht (Meteorology) from the Agricultural Research Council presented the first keynote address, focusing on climate dynamics. 

“We have high-impact weather systems across Southern Africa. It is projected that strong El Niños are to double in frequency towards the end of the 21st century,” said Dr Engelbrecht. 

She further predicted temperature increases of between 4 and 7 degrees Celsius in the interior before the end of the century. Over the Free State, Northern Cape, and North-West Province, we can expect shorter frost seasons, significant increases in maximum temperatures for both summer and winter, as well as more frequent El Niño-induced droughts. 

Ecological footprint of food

Improved production outputs need to be achieved by using less land, water, and available energy, while ensuring that the degradation and pollution of natural resources are limited. A scientific approach would be a viable option to improve the efficiency of livestock production.

SASAS President, Prof Este van Marle-Köster from the University of Pretoria, pointed out that all food had an ecological impact.

Dr Frikkie Maré, Head of the Department of Agricultural Economics at the UFS, presented a keynote lecture on managing the footprint of beef through efficient production. Comparing the water footprint of different cattle breeds, his question was what could be done to reduce this. 

Animal welfare was introduced to the congress for the first time. Prof Cathy Dwyer from Scotland’s Rural College presented a session on, ‘Can animal welfare contribute to improved production efficiency?’

The oldest conception of animal welfare is the five freedoms adapted to the five welfare needs of animals, namely a suitable environment, a suitable diet, exhibiting normal behaviour patterns, being with or being apart from other animals, and protection from pain, injury, suffering, and disease. Studies demonstrate that animal welfare can be an important and effective part of production efficiency, and that animal welfare should be seen as an integral component of improving the sustainability of livestock. 

Prof HO de Waal from the Predation Management Centre at the UFS presented a session on the impact of predation on livestock production, with the tile: The need for coordinated predation management in South Africa – quo vadis? He said: “The current approach to predation management is fragmented and uncoordinated. Solutions for the management of human-wildlife conflict require a South African institutional memory. Most of the information on predation and the hunting of predators is held by specialist predator hunters and farmers. In a system of coordinated predation management, farmers and government are equal partners, each with specific responsibilities.”

News Archive

Research by experts published in Nature
2011-06-02

 
The members of the research group are, from the left, front: Christelle van Rooyen, Mariana Erasmus, Prof. Esta van Heerden; back: Armand Bester and Prof. Derek Litthauer.
Photo: Gerhard Louw

A  research article on the work by a team of experts at our university, under the leadership of Prof. Esta van Heerden, and counterparts in Belgium and the USA has been published in the distinguished academic journal Nature today (Thursday, 2 June 2011).

The article – Nematoda from the terrestrial deep subsurface of South Africa – sheds more light on life in the form of a small worm living under extreme conditions in deep hot mines. It was discovered 1,3 km under the surface of the earth in the Beatrix Goldmine close to Welkom and is the first multi-cellular organism that was found so far beneath the surface of the earth. The worm (nematode) was found in between a rock face that is between 3 000 and 12 000 years old.

The research can shed some new light on the possibility of life on other planets, previously considered impossible under extreme conditions. It also expands the possibilities into new areas where new organisms may be found.

These small invertebrates live in terrestrial soil subjected to stress almost for 24 hours They live through sunshine, rain, scorching temperatures and freezing conditions. Through time they developed a means to cope with harsh conditions. Terrestrial nematodes (roundworms, not to be confused or related to earthworms) are among those very tough small invertebrates that deal with those conditions everywhere. After insects they are the most dominant multi-cellular (metazoan) species on the planet having a general size of 0,5 to 1 mm and are among the oldest metazoans on the planet, Nature says in a statement on the article.

They inhabit nearly every imaginable habitat form the deep seas to the acid in pitcher . Some nematodes simply eat bacteria and these are the ones we study here. Terrestrial nematodes have developed a survival stage that can take them through hard times (absence of food, extreme temperatures, too little oxygen, crowding, and more).

At the head of the research was Prof. Gaetan Borgonie of the Ghent University in Belgium and a world leader in the discipline of nematode research. He was brought into contact with the South African research leader, Prof. Esta van Heerden, who set up a cooperation agreement with the University of Ghent and Prof. Borgonie. Prof. Van Heerden manages the Extreme Biochemistry group at the UFS and the research was funded by several research grants.

The search for worms began in earnest in 2007, but it was soon clear that the sampling strategy was insufficient. A massive sampling campaign in 2008-2009 in several mines led to the discovery of several nematodes and the new nematode species Halicephalobus mephisto. It is named after the legend of Faust where the devil, also known as the lord of the underworld is called Mephistopheles.

Nature says special filters had to be designed and installed on various boreholes. Unfortunately, there is no easy way of finding a magic formula and designs had to be adapted by trial and error; improving existing designs all the time. The work of the UFS Mechanical Workshop, which manufactured, adapted and helped design it, was crucial in this respect. Filters were left on the holes for varying periods, sometimes for a few hours and sometimes for months. Prof. Derek Litthauer from the UFS played a big role in sampling, filter designs and coming up with ideas for names for the new nematode with Prof. Borgonie.

Research showed that the nematodes can live in the deep for up to 12 000 years. Three students – Armand Bester, Mariana Erasmus and Christelle van Rooyen from the UFS – did the work on this.

The importance of multi-cellular animals living in the ultra-deep subsurface is twofold: The nematodes graze on the existing bacterial population and influence their turnover. Secondly, if more complex multi-cellular organisms can survive in the deep subsurface on earth, this may be good news when looking for life on other planets where the surface is considered too inhospitable (e.g. Mars). Complex life forms can be found in ecosystems previously thought to be uninhabitable. Nature says this expands the possibilities into new areas where new organisms may be discovered.

Future research will focus on selective boreholes to look for more metazoans, so that a better idea of the complexity of the ecosystems there can be obtained. It will also look for metazoans in the deep subsurface on other continents to determine similarities and differences.

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