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Curiosity about environmental changes drives Dr Katlego Mashiane’s PhD research

21 April 2023 | Story Leonie Bolleurs | Photo Supplied

Striving to make a difference in the field of biodiversity conservation, Dr Katlego Mashiane decided to pursue a PhD in Geography, focusing on the spatial modelling of grassland diversity and nutrients in subalpine environments. He received his PhD during the recent April graduation ceremonies on the Qwaqwa Campus.

In the small village of Ga-Mabotia about 25 km outside of Polokwane, Dr Katlego Mashiane grew up, surrounded by rocky mountains characterised by boulder outcrops, where he interacted with nature from an early age.

He recently obtained his PhD, majoring in Geography, from the University of the Free State (UFS), which was conferred on him during the April graduation ceremonies that took place on the UFS Qwaqwa Campus. The title of his dissertation is Grass nutrients estimation as an Indicator of rangeland quality using satellite remote.

Predicting the presence of biodiversity and nutrients in an area

Based on the principle that diverse grasslands tend to perform better, environmental changes threaten the resilience and services these grassland ecosystems provide. The study examined how many different types of plants and animals can be found at a particular place to enhance our understanding of the ecosystem’s value to humans, and that biodiversity loss will reduce these ecosystem services. Focusing on spatial modelling of grassland diversity, Dr Mashiane specifically investigated the influence of topography and remotely sensed satellite data on species richness and diversity in subalpine environments, and how they are affected by the availability of grass species. To determine this, he used a random forest machine-learning algorithm to find the best information in the data that could be used to estimate the levels of species richness, diversity, and nitrogen in a protected national conservation park.

His study discovered that some data types – such as the near-infrared variable and certain vegetation data (EVI and SAVI) – were especially useful for determining the number and variety of species in a certain area. With this information, scientists can create models that predict the presence of different types of biodiversity and nutrients in an area.

Playing a key role in protecting our natural assets

Equipped with this knowledge, one will be able to understand how to protect and preserve different types of biodiversity and promote the nutritional value of both plants and animals in the environment. “Land managers could use this information for conservation strategies,” states Dr Mashiane, who decided to pursue this study because he was curious about how environmental changes will affect species.

“Grasslands provide important ecosystem services underpinning human well-being, and therefore warrant our protection; I would like to play a role in protecting our natural assets and contribute to understanding our biomes, especially in the context of global change,” he says.

In the next five years, Dr Mashiane plans to pursue further research and mentor other students in his field of study.

News Archive

Kovsie students selected for prestigious study travel programme

2013-05-15

Golden Key International Honour Society members, Michael van Niekerk, Siobhan Canavan, Mpoi Makhetha and Cebolenkosi Sokhela, will travel to the USA and China, meeting the best in their career fields.
Photo: Hannes Pieterse
15 May 2013

They are amongst the top 15 percent of academic achievers at the university, and have been afforded the opportunity to travel abroad and meet with leading people in their fields of study.

Kovsie students Michael van Niekerk, Siobhan Canavan, Mpoi Makhetha and Cebolenkosi Sokhela, all members of the Golden Key International Honour Society, will travel to the USA and China. This trip is part of the International Scholar Laureate Program (ISLP) to learn how their career fields are practiced in another part of the world. The students are part of a select group of outstanding university students from across the world who will be given access to people, places and global perspectives in fields such as business, engineering, medicine, nursing, diplomacy and international relations.

Michael, a fourth-year MBChB student and SRC member of our Bloemfontein Campus, and Cebolenkosi, a third-year BSc Microbiology student will visit Washington, Philadelphia and New York in the USA. As part of the medicine delegation of the programme, they will visit clinics and hospitals to see how their study fields are practiced. Michael’s trip includes a visit to Johns Hopkins University in Baltimore, where he will meet representatives of the National Institute of Health, the largest source of funding for medical research in the world. He will also visit Harvard University in Massachusetts.

Mpoi, a third-year BSc Human Molecular Biology student, also forms part of the medicine delegation but will travel to China. "We will be exploring the ancient ways of healing versus the modern medical practices, exploring the medical systems of the country and meeting doctors and professors, visiting the rural areas, and of course, touring the best parts of China,” she said.

Siobhan, a third-year Media Studies and Journalism student, is part of the diplomacy and international relations delegation who will visit Beijing, Xi'an and Shanghai in China. "To me it's such an honour to be part of this programme,” she said. “It will give me the platform to not only represent who I am, but also my university and the values that the university has instilled in me. It allows me to be a part of something great that will benefit me in the end."

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