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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

Kovsies defend tennis title in Sun City

2017-04-01

The first and second tennis teams of the University of the
Free State were first and fifth respectively among the 14
teams competing in the Egalite Invitational challenge.
Photo: Arne Nel

Although a tournament victory was not the Kovsie tennis team’s main goal, they still managed to outplay the best in the country.

The first team of the University of the Free State (UFS), who have been the champions of the combined USSA format for the past six years, successfully defended its title to end the Egalite Invitational challenge in Sun City unbeaten.

Second team also performing well

On 26 March 2017, the Kovsie first team defeated Puk’s first team 35-20 (games) in the final. Their second team also performed well and won against Tuks’ second team 31-21 to end fifth among the 14 teams. The matches in the tournament, which took place from 24 to 26 March 2017, were played in World Team Tennis format.

In the group stages, the Kovsie first team beat Puk’s second (35-12), Puk’s fourth (35-8), Tuks’ second (35-12), Maties’ first (31-19), Puk’s sixth (35-5), and Tuks’ third (32-16) teams. The team consists of Arne Nel, Christo Koekemoer, Emke Kruger, Lienke de Kock, Ansunica Brits, and Reze Opperman.

Preparation for USSA

Apart from USSA, the Sun City tournament is the other major tournament in which the UFS annually competes. “Of course you want to win, but unlike at USSA, this was not our main focus in Sun City,” says Janine de Kock, the Kovsie team manager. “We wanted to try new combinations and provide exposure to new players.”

A total of five of the 12 players in the two teams were newcomers. They are Lienke de Kock (first team), Handré Hoffman, JC Conradie, Brieta Pienaar, and Daniel de Villiers (all second team). According to Janine de Kock, it was especially important to test new doubles combinations before USSA.

“We always knew the first team is a good team with a chance, but we are very impressed with the second team’s fifth place.”

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