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16 May 2024 | Story Leonie Bolleurs | Photo supplied
Dr Yolandi Schoeman
Dr Yolandi Schoeman believes the project is directly contributing to the regeneration and conservation of biodiversity, innovating towards creating unique urban biodiversity markets, and creating a thriving natural habitat that supports ecological balance and resilience.

Tim Briercliffe, Secretary General of the International Association of Horticultural Producers (AIPH), recently congratulated the City of Tshwane for the work done on urban greening and nature-based solutions that resulted in its entry: ‘Republic of South Africa City of Tshwane Pretoria East Urban Biosphere Reserve’ being selected as one of 21 finalists in the Living Green for Biodiversity category of the AIPH World Green City Awards 2024.

The list of finalists comprises the three highest-scoring entries in each of the seven categories. The Tshwane project was entered in the Living Green for Biodiversity and Urban Ecosystem Restoration category as well as the Living Green for Urban Infrastructure and Liveability category.

Dr Yolandi Schoeman, Postdoctoral Fellow/Researcher in Ecological Engineering in the centres for Mineral Biogeochemistry and Environmental Management and the Ecological Engineering Institute of Africa at the University of the Free State (UFS), played a critical role in conceptualising and driving the bio-intelligent approach that is integral to the Tshwane SA Biosphere Reserve project.

She states that being part of a project recognised as a finalist for such a prestigious global award is profoundly gratifying. “It underscores the importance and urgency of our work in ecological engineering and biodiversity conservation, validating our efforts to create resilient urban ecosystems that can inspire similar initiatives globally.”

Enhancing urban sustainability

According to her, it is one of the university’s flagship projects in Gauteng. “Our team was pivotal in developing the methodological framework that facilitated the integration of ecological, economic, social, and technological dimensions to effectively address climate change, biodiversity loss, disconnections in coupled human and natural systems, and enhance urban sustainability.”

Dr Schoeman says the project was initiated in the early stages of their investigations into sustainable urban development, with notable developments in 2023, as highlighted during the City of Tshwane Climate Change and Research Conference. She indicates that the project is continuing, with phases that include various baseline research activities, active ecosystem regeneration, continuous monitoring, roll-out of a unique biodiversity citizen science approach, integrated and inclusive stakeholder involvement, creating a unique urban biodiversity market, awareness and capacity building, and moving towards formally applying to the International Union for Conservation of Nature (IUCN) for the formal recognition of the urban biosphere region within the greater Pretoria East area.

She remarks that her inspiration to engage in this project stemmed from a commitment to address the multifaceted challenges posed by climate change and biodiversity loss, particularly in urban settings. “The most remarkable aspect of the project is its innovative approach to integrating urban development with ecological engineering, fostering a sustainable coexistence between humans and nature that serves as a model for cities worldwide,” she says.

She is excited about the impact of the work that has been done. Not only is the project directly contributing to the regeneration and conservation of biodiversity, creating a thriving natural habitat that supports ecological balance and resilience, but it is also impacting the greater Tshwane community. Dr Schoeman believes that the project significantly enhances community engagement and participation, which in turn fosters greater awareness and responsibility towards sustainable living practices.

Crafting practical, impactful solutions

Besides her instrumental role in making an impact, Dr Schoeman also enjoyed the project, particularly the opportunity to collaborate with a diverse group of stakeholders, including local communities, government bodies, and fellow researchers. “This multidisciplinary collaboration has not only enriched the project but has also been instrumental in crafting practical, impactful solutions tailored to the specific needs and characteristics of Tshwane,” she comments.

As a finalist in the Living Green for Biodiversity category of the AIPH World Green City Awards 2024, the city of Tshwane will receive a Highly Commended certificate at an awards ceremony in September in Utrecht, the Netherlands, and will ultimately have the opportunity to win the title of Grand Winner of the 2024 edition of the AIPH World Green City Awards.

News Archive

Scientists discover a water reservoir beneath the Free State
2009-12-09

Dr Holger Sommer

The Mantle Research Group Bloemfontein (MRGB), under the leadership of Dr Holger Sommer, a senior lecturer in the Department of Geology at the University of the Free State (UFS), has discovered an enormous water reservoir 160 km beneath the Free State.

This discovery, according to Dr Sommer, is the first of its kind in South Africa after he had previously made a similar finding in Colorado, USA.

However, this water cannot be used for human consumption. “It is not frozen water; it is not molecular water; it is not fresh water; it is not salty water; it is OH – water which is sitting in the crystal lattice,” he said.

He said the reservoir was comparable in size to Lake Victoria in Tanzania.
The researchers collected eclogites from the Roberts Victor (Rovic) Mine close to the town of Boshof, south-west of the Free State, for their study.

“The Rovic eclogites are rocks which represent former oceanic crust transported into the earth’s interior by complex plate tectonic processes about 2.0 billion years ago,” explained Dr Sommer.

“These rocks were finally carried back to the earth’s surface by volcanic (kimberlite) eruptions around 130 million years ago. Eclogitic rocks are therefore a window into the Earth’s interior.”

The question from the beginning for all MRGB scientists was: Is there water inside these rocks in such depth, and if so, where is it located?

To answer this question, Dr Sommer and his research fellows separated single mineral grains from eclogite samples and prepared about 100 micrometer (0,1 mm) thick rock sections. Afterwards, specific particle accelerator (Synchrotron) measurements were carried out in the city of Karlsruhe in Germany.

“And indeed, the MRGB found water inside the studied rocks from the Roberts Victor Mine,” he said. “The water was located in defect structures in crystal lattices and along boundaries between single mineral grains.”

“The occurrence of water at such depth would give first evidence that all water of the oceans could be stored five to ten times in the earth’s mantle.”
The study was conducted about a year ago.
 

Media Release
Issued by: Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt.stg@ufs.ac.za
4 December 2009

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