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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

UFS attracts excellent and diverse students

2015-08-20

Matshediso Mokoena and Thato Monkoe.
Photo: Thabo Kessah

When Thato Monkoe and Matshediso Mokoena sat for their final matric examinations in 2014, all they had on their minds was not just passing, but passing well. Little did they know at that time that passing well would place so much responsibility on their shoulders.

Both Thato and Matshediso come from rural and disadvantaged backgrounds. They are first-year students at the Qwaqwa Campus of the University of the Free State, and are the first in their respective families to study at a university.

Thato describes his situation as “sad and good at the same time”.

“It is good, because I am the first one at home to have completed my matric and to have gone on to study at a tertiary institution. At the same time, it is sad as I feel sorry for my siblings who, for various reasons, did not have similar opportunities when they opted out of school”, said Thato, a BEd student.

”Now my sister and brother, as well as the entire family, perceive me as the one with brains, and this makes me uncomfortable. However, I am up for the challenge to be the first one to graduate with a degree in my family”.

Matshediso Mokoena, a BSc student, who obtained distinctions in Mathematics, Physical Sciences, and Life Sciences last year, concurs with Thato.

”As much as my family is supportive, there is always pressure as they expect the best from me,” she said.

“The pressure does not only come from my family. My entire community looks up to me, and they can’t stop talking about my achievements”, Matshediso revealed.

Both Thato and Matshediso are, however, happy that the dark cloud of doubt about academic achievement in their families has finally disappeared.

“At least someone in my family is hard at work carving her future, and willing to set a good example. That person is me”, said Matshediso, who aspires to be a medical doctor, and has a younger sister in Grade 8.

Thato and Matshediso are just two of hundreds of students making good use of the University of the Free State’s commitment to attract excellent and diverse students at both undergraduate and postgraduate levels, as reflected in the Strategic Plan 2015-2020.

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