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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

UFS researchers help find opportunities to create knowledge
2016-09-15

Description: Mobile libraries  Tags: Mobile libraries

The initiative hopes that the mobile libraries
will continue to contribute towards literature
awareness and access to books at rural
schools in the Free State.
Photo: Supplied

Did you know that only 3 392 primary schools in South Africa have libraries? In the Free State the statistics are shocking. Only 277 primary schools have libraries, while 1 087 carry on without them. One of nine provinces in South Africa, the Free State is regarded as a rural province. The South African Primary Education Support Initiative (SAPESI), in partnership with other sponsors, has committed to expanding access to books by donating mobile libraries to service schools across South Africa. In the Free State, the project is embraced by the Free State Department of Education, which employs the mobile operators and library assistants to service these libraries, driving many kilometres of gravel road to visit remote farm schools and other under-resourced schools. SAPESI has set a goal to supply 75 mobile libraries to provide 2 000 schools with access to books by the year 2020.

Discovering the value of the mobile libraries
Although the mobile libraries in the Free State have been functioning since 2007, no formal research had been conducted on their work. Towards the end of 2014, the Free State Department of Education and the Flemish Association for Development Cooperation and Technical Assistance (VVOB) commissioned the UFS to carry out a participatory action research project. Dr Lynette Jacobs, Head of the School of Education Studies at the University of the Free State’s Faculty of Education and her team engaged with role-players at district and provincial level in a Participatory Action Research project.

The research project aimed to describe the work that mobile libraries do, and appraise its influence on learners and schools, towards improving their functionality. In addition, this project aimed to build research capacity within the district teacher development centres.

Highlights of the mobile library project
The way the Free State Department of Education embraced and supported the initiative by Mr Tad Hasunuma and SAPESI, was inspiring. Each of the five education districts has two fully equipped library buses that periodically visit schools. The stock on the buses is regularly replaced by books that SAPESI receives from the international community. Specific books are also loaded for teachers to use as resources. One of the outcomes of the research project was that guidelines were developed for teachers on how to use books in addition to curriculum material in the classroom. At district level, the teams reflected on the work that they were doing and implemented improvement plans to provide an even better service. Findings of the project were presented at the XIV Annual International Conference of the Bulgarian Comparative Education Society that focused on education provision earlier this year. It was lauded by representatives of the international education community as an example of good practice to provide education to marginalised children.

Reading helps enrich children’s lives
The research project concluded by stating that the aim of the mobile libraries was to provide learners and teachers at rural and farm schools with reading books, and they were doing as best they could. While the mobile libraries cannot make up for possible challenges related to teaching and learning or in infrastructure, the learners and the teachers are regularly provided with good resources to encourage reading and stimulate literacy development.

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