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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 Faculty of Health Sciences opens student residence in Trompsburg
2017-07-06

Description: Trompsburg read more Tags: Trompsburg read more

Official unveiling of the memorial plaque by
Prof Gert van Zyl, Dean of the Faculty of Health Sciences,
and Prof Francis Petersen, Rector and Vice-Chancellor
of the University of the Free State.
Photo: Charl Devenish

The University of the Free State’s (UFS) Faculty of Health Sciences has, as part of its commitment to student and community development, established a student residence in the town of Trompsburg in the Kopanong Local Municipality. The faculty officially opened the Rural Community Initiative and student residence in June 2017. The newly developed student residence has 10 apartments which could each accommodate six individuals.  A housemaster resides on the premises and acts as manager of the facility.  All areas of the residence are Wi-Fi covered and it has a 24-hour security service.

Importance of the residence
The goal of the Kopanang le fodise – Unite to heal programme is to develop a community-centred collaborative framework for sustainable, holistic healthcare and social development which is incorporated in the curricula of the faculty. During 2016, a total of 324 fourth-year students have each spent at least a week in primary healthcare facilities on a Community Based Education and Inter-Professional Education platform in Trompsburg and Springfontein in the Kopanong Municipality.

“This programme was commissioned to fulfil a specific goal. We are connecting our students with the community. The support of everyone coming together caused this to move from being just a spark, to a blaze. This is all our project,” said Dr René Botha, coordinator for Community-based Education and Rural Health in the faculty.

Community outreach a priority
“This is an innovative project that has been able to bring health and health-related issues to the community. One of the UFS’ three focus areas is community engagement. This project is primarily focused on serving the community, but also on the academic element, which is student development,” said Prof Francis Petersen, Rector and Vice-Chancellor of the UFS.

Prof Petersen commended the project on being the first of its kind in the South African Health Sciences sector. The platform will also be used for research purposes that will enrich the sector. Prof Petersen challenged the Kopanong community to give their input by answering two questions: What is the UFS good at? What is the UFS good for?

Reaching for the stars
“I am a dreamer and I have to reach, and if I reach, I reach for the stars. Today we are very lucky, because we have grabbed that star,” said Prof Gert van Zyl, Dean of the UFS Faculty of Health Sciences.

Prof Van Zyl reminded the audience that they possess the power to change challenges into stars by approaching them with careful thought, planning, and motivation. Prof Van Zyl concluded by stating that the rural community initiative is for the community, and that the faculty is just the facilitators.

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