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Dr Gladys Belle’s research dedicated to reducing impact of COVID drugs on water resources

11 February 2024 | Story Leonie Bolleurs | Photo SUPPLIED

Beyond the destruction caused by the Coronavirus during the COVID-19 pandemic, it continues to impact not only the lives of many people but also the environment.

Dr Gladys Belle, a postdoctoral researcher in the Centre for Environmental Management at the University of the Free State (UFS), is currently focusing her research on the risk assessment of pharmaceuticals of emerging concern in water resources, specifically concerning human health and aquatic ecosystems. She explains that her research investigates the occurrence, fate, and behaviour of four drugs used during COVID-19 and assesses the risk these drugs pose to human health and the aquatic ecosystem within the Orange-Senqu River Basin.

“I am passionate about water research and more passionate about human health. My interest in water and health-related research grew due to the health crisis caused by human exposure to contaminated water sources in South Africa,” she states.

Dr Belle adds that she wants to raise awareness and shape the behaviour of local communities in South Africa regarding safe disposal methods. Through programmes such as take-back initiatives, the research seeks to reduce the impact of pharmaceuticals on water resources. She states, “My research will also influence the implementation of various preventive measures, including policies regulating the disposal of drugs into the environment. This research may serve as the basis for better sanitation solutions within communities and improving wastewater treatment processes in the country.”

Focusing on women scientists such as Dr Belle, the UFS will be celebrating the United Nations International Day of Women and Girls in Science on 11 February, commemorating women in the field of science and encouraging girls to pursue careers in this field.

A passion for academia and science

From a young age, Dr Belle was deeply enthusiastic about academia, particularly in the field of science. She studied Environmental Sciences at a university in Cameroon, earning her BSc in 2003. Taking a ten-year break, she focused on being a mum and also worked as Biology teacher in Lesotho.

Despite staying away from the university for an extended period, Dr Belle never let go of her passion and vision to one day become a renowned researcher and academic. In 2012, she enrolled for her honours degree in Environmental Health, followed by her master's in 2013, which she passed with distinction. Immediately after, she enrolled for a PhD and successfully graduated in 2021.

She mentions that her PhD journey came with various challenges, balancing responsibilities as a part-time lecturer, a mother, and a wife while pursuing her studies. “Regardless of all those challenges, I never gave up. Instead, they kept me motivated to get going,” she says.

The same year that she obtained her PhD, Dr Belle joined the university as a postdoctoral researcher. “Being a researcher at the UFS has allowed me to advance my research career and provided a platform for me to meet and learn from the gurus in my field,” she comments. Dr Belle considers Prof Paul Oberholster, the Dean of the Faculty of Natural and Agricultural Sciences and her current supervisor, as a true mentor. He not only teaches her the skill of hard work, but he also encourages her to aim high in research. She also expresses great appreciation to the Directorate of Research Development for its support during her research journey, providing her with access to tools and resources to effectively pursue her work as researcher.

As postdoctoral researcher, Dr Belle expanded her research expertise by publishing in peer-reviewed journals and gaining experience in writing grants and managing projects. In 2023, she received two prestigious research grants. In the Water Research Commission grant, she is leading a team of six national and international experts in risk assessment of emerging contaminants in water resources.

Furthermore, Dr Belle received the Innovation Postdoctoral Fellowship award for 2023 from the National Research Foundation (NRF). She explains that the project focuses on investigating sources, pathways, occurrences, and potential risks of pharmaceuticals of emerging concern on potential receptors in water resources. “This study targets the different wastewater treatment plants (WWTP) in Mangaung, as these plants pose a potential risk of introducing pharmaceuticals into water systems,” she remarks.

Strengthening capacity development

Focusing on understanding the risks of new pollutants in water resources, Dr Belle is well on her way to becoming one of the leading researchers in water and health, a long-standing aspiration of hers. “I see myself working with top researchers in my field, both nationally and internationally, to be part of important international research projects, including working with the European Union and the United Nations,” she says.

In addition to making an impact on the international stage and collaborating with experts in her field, she also aims to transfer and share her skills to the postgraduate students working with her, thereby strengthening their development.

For girls and young women aspiring to embark on a journey in any field of science, her message is that it is possible. “Whatever career path you wish to pursue in sciences, put your mind to it and be passionate about what you do; ultimately, you will testify that ‘it is possible’,” Dr Belle concludes.

News Archive

Studies to reveal correlation between terrain, energy use, and giraffe locomotion

2016-11-18

More than half of giraffes in captivity in Europe are afflicted by lameness. This high prevalence represents an important welfare issue, similar to other large zoo animals.

According to Dr Chris Basu, a veterinarian at the Royal Veterinary College in the UK, giraffes in captivity are often afflicted by overgrown hooves, laminitis and joint problems. Diagnosis and treatment is limited by our understanding of anatomy and function, more specifically the locomotion of these animals. Although the giraffe is such a well-known and iconic animal, relatively little has been studied about their locomotor behaviour.

Dr Basu recently visited South Africa to do fieldwork on the locomotion of giraffes as part of his PhD studies under the mentorship of world-renowned Professor of Evolutionary Biomechanics, Prof John Hutchinson. This project is a joint venture between Dr Basu and Dr Francois Deacon, researcher in the Department of Animal, Wildlife, and Grassland Sciences at the UFS. Dr Deacon is a specialist in giraffe habitat-related research.

Together Prof Hutchinson and Drs Deacon and Basu form a research group, working on studies about giraffe locomotion.

Wild giraffe population decrease by 40% in past decade

“Locomotion is one of the most common animal behaviours and comes with a significant daily energetic cost. Studying locomotion of wild animals aids us in making estimates of this energetic cost. Such estimates are useful in understanding how giraffes fit into ecosystems. Future conservation efforts will be influenced by knowledge of the energy demands in giraffes.

“Understanding aspects of giraffe locomotion also helps us to understand the relationships between anatomy, function and evolution. This is relevant to our basic understanding of the natural world, as well as to conservation and veterinary issues,” said Dr Deacon.

Locomotion study brings strategy for specialist foot care

On face value it seems as if foot disease pathologies are more common in zoo giraffes than in wild giraffes. “However, we need a good sample of data from both populations to prove this assumption,” said Dr Basu.

This phenomenon is not well understood at the moment, but it’s thought that diet, substrate (e.g. concrete, straw, sand and grass) and genetics play a part in foot disease in giraffes. “Understanding how the feet are mechanically loaded during common activities (standing, walking, running) gives our research group ideas of where the highest strains occur, and later how these can be reduced through corrective foot trimming,” said Dr Basu.

Through the studies on giraffe locomotion, the research group plans to devise strategies for corrective foot trimming. At the moment, foot trimming is done with the best evidence available, which is extrapolation from closely related animals such as cattle. “But we know that giraffes’ specialist anatomy will likely demand specialist foot care,” Dr Basu said.

Studying giraffes in smaller versus larger spaces

The research group has begun to study the biomechanics of giraffe walking by looking at the kinematics (the movement) and the kinetics (the forces involved in movement) during walking strides. For this he studied adult giraffes at three zoological parks in the UK.

However, due to the close proximity of fencing and buildings, it is not practical to study fast speeds in a zoo setting.

A setting such as the Willem Pretorius Nature Reserve, near Ventersburg in the Free State, Kwaggafontein Nature Reserve, near Colesberg in the Karoo, and the Woodland Hills Wildlife Estate in Bloemfontein are all ideal for studying crucial aspects such as “faster than walking” speeds and gaits to measure key parameters (such as stride length, step frequency and stride duration). These studies are important to understand how giraffe form and function are adapted to their full range of locomotor behaviours. It also helps to comprehend the limits on athletic capacity in giraffes and how these compare to other animals.

Drones open up unique opportunities for studying giraffes

The increasing availability of unmanned aerial vehicles (UAVs)/drones opens up unique opportunities for studying locomotion in animals like giraffes. Cameras mounted onto remotely controlled UAVs are a straightforward way to obtain high-quality video footage of giraffes while they run at different speeds.

“Using two UAVs, we have collected high definition slow motion video footage of galloping giraffes from three locations in the Free State. We have also collected detailed information about the terrain that the giraffes walked and ran across. From this we have created 3D maps of the ground. These maps will be used to examine the preferred terrain types for giraffes, and to see how different terrains affect their locomotion and energy use,” said Dr Deacon.

“The raw data (videos) will be digitised to obtain the stride parameters and limb angles of the animals. Later this will be combined with anatomical data and an estimation of limb forces to estimate the power output of the limbs and how that changes between different terrains,” said Dr Basu.

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