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26 April 2018 Photo Supplied
Pretzel-formed fossil of great evolutionary interest
Slab with holotype of Parapsammichnites pretzelifornic from the Urusis Formation, Namibia. Scale bar is 1cm.Picture was taken from Buatois et al., 2018.
The acclaimed scientific journal, Nature, recently published an article about a trace fossil in approximately 543-million-year-old rocks, which elucidates the evolution of the first animals that appeared on Earth and lived in the sea.  

Affiliated Professor in the Department of Geology at the University of the Free State (UFS) Prof Gerard Germs formed part of a team that conducted research with the aim of understanding how the evolution of the first multicellular animals came about and how the Cambrian explosion took place. Prof Germs is of great value to the team for his extended field geological knowledge.

An article which he co-authored was published in the Nature Scientific Reports. The title of the article is: “Sediment disturbance by Ediacaran bulldozers and the roots of the Cambrian explosion”. The international group of writers included authors from Canada, Spain and South Africa. 

Occurrence of the Cambrian explosion
Prof Germs explains the Cambrian explosion: “During the long (4.5-billion-year) history of the Earth, the first life originated and subsequently evolution of plants and animals took place from one-cellular organisms to multicellular vertebrate animals and seed plants. Approximately 573 million years ago the first multicellular animals appeared on the scene. Sometime afterwards, approximately 540 million years ago, a kind of explosion in the origin of many new animal species occurred. This explosion is known as the Cambrian explosion.”

The team studied Earth sediments which are somewhat older than the Cambrian explosion. Such sediments are approximately 573 to 541 million years old and form part of the Ediacaran (late Neoproterozoic) period.

“My discoveries of the past, of among others, the oldest animal with a carbonate skeleton (Cloudina) and of complex horizontal Cambrian-type “worm” tracks (treptichnids) in Ediacaran sediments of Namibia have demonstrated that the Cambrian explosion occurred more gradually than previously thought. This has recently been confirmed in the article that was published in the Nature Scientific Reports.”

Pretzeliformis bulldoze to search for food
According to the article there is evidence that   during the Ediacaran period   worm-like animals such as the Parasammichnites pretzeliformis were already so far developed that they, due to coelom development and size increase, for the first time in the history of the Earth, were able to disturb and bulldoze sediments.  In this way they were able to find a new food source in sea sediments. Bulldozing animals were previously thought to have originated only during and after the Cambrian explosion and not during the older Ediacaran.

“Another major aim of my cooperative research is to improve our knowledge of the geology of the Ediacaran to early Cambrian of South Africa and Namibia. We also intend to establish how the assembly of the supercontinent Gondwana took place. This improved knowledge can be of great future economic interest since large oil, gas and limestone sources occur in Ediacaran-age sediments outside South Africa”.

News Archive

JN Boshoff Memorial Lecture: Dr Charles Nwaila
2005-09-13

Dr Charles Nwaila, Director-General of the Free State Provincial Government and Vice-Chairperson of the University of the Free State's (UFS) Council, recently discussed the repositioning of the Free State Provincial  Government to respond to the 21st century demands during the JN Boshoff Memorial Lecture at the UFS. 

 

 

From left:  Dr Nwaila; Prof Tienie Crous, Dean:  Faculty of Economic and Management Sciences; Prof Frederick Fourie, Rector and Vice-Chancellor and Dr Moses Sindane, Departmental Chairperson:  Department of Public Management at the UFS.
 

A summary of the lecture.

Free State government to focus on training of public servants

The Free State provincial government in collaboration with higher education institutions in the province is to establish the Free State Association of Public Administration to get public servants to work effectively towards the growth and development of the province.
This was announced by the Director-General of the Free State provincial government, Dr Charles Nwaila, during a lecture he delivered at the University of the Free State (UFS) in Bloemfontein this evening (Thursday 8 September 2005).

Delivering the annual JN Boshoff Memorial Lecture at the UFS, Dr Nwaila called on higher education institutions to play a critical and leading role in the re-engineering of the existing Provincial Training and Development Institute housed at the Vista campus of the University of the Free State in Bloemfontein.

Dr Nwaila was formerly the Superintendent-General (head) of the Free State Department of Education and currently serves as the Deputy Chairperson of the Council of the University of the Free State.
He said the proposed Free State Association of Public Administration is a joint initiative with the National Academy of Public Administration based in Washington DC.

“We take this opportunity to invite the University of the Free State and other knowledge based institutions to join the Provincial Government in fostering a collaborative network to help us develop our public servants,” Dr Nwaila said.
He said there were accelerating demands and a lot of pressure on limited resources, with Free Staters expecting more from their government than ever before.

“Civil servants in a developmental state are servants of the people, champions of the poor and the downtrodden and not self-serving individuals that seek only advancement on the career ladder,” Dr Nwaila said.
According to Dr Nwaila, the Free State Growth and Development Strategy has identified 11 areas that need to be addressed by the year 2014, including:

• To reduce unemployment from 38% to 20%
• To improve the functional literacy rate from 69,2% to 85%
• To stabilize the prevalence rate of HIV and AIDS  and reverse the spread of the disease
• To provide a free basic service to all households
• To provide adequate infrastructure for economic growth and development


Dr Nwaila said that the Free State government will continue to follow a people-centred approach towards these development objectives with a keen sense of unity and unwavering determination to create the best of times for the Free State and all its people.


 

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