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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

SA women’s Hockey players give a recount of Hockey World League

2015-07-02

Nicole Walraven and Liné Malan
Photo: Hatsu Mphatsoe

Three of the star players of Kovsies Hockey formed part of the South African Women’s Hockey team, which competed at the Hockey World League (HWL) tournament in Spain.

Hatsu Mphatsoe, student assistant at the Department of Communication and Brand Management, spoke to Nicole Walraven and Liné Malan. Tanya Britz will be returning only at a later stage to South Africa.

As key players in the Kovsies women’s team, Malan and Walraven (along with Britz) have a new wealth of knowledge that could assist the team in their forthcoming USSA tournament. Here are some of the sentiments they had to share:

What was your reaction when you first received the news that you’d be representing the country in Spain?

Liné: “It was a shock to me, I honestly didn’t expect it. At the same time, I was extremely excited to be granted the opportunity to represent my country, and prove my worth to the team.”

Nicole: “I was so excited and felt honoured! To represent my country at such a big tournament is amazing. I was very nervous, but excited.”

How has playing at an international level improved your personal performance and mentality of the game/sport?

Nicole: “Playing at such a high level has helped my hockey immensely. It has helped me read the game better, it has upped my self-confidence, and it has also improved my ability to deal with pressure.”

Liné: “Playing at an international level looks much easier than it is. It is a much faster game, the pressure on the ball is much higher, and the individual skills are on a different level. It has helped me to lift my game, and make decisions much quicker. It has honestly benefitted me as an individual, and I’ve learnt so much from the experience.”

Now that you’ll be going to play at the USSA tournament, what new perspectives do you wish to bring to the team in order to improve its overall performance there?

Nicole: “The importance of teamwork as well as adapting the game plan according to the situation and the opposition. Constant hard work and a never-give-up attitude are vital. One quote that stood out from the tournament is ‘1MT, 1MT’ which stands for ‘1 More Thing, 1 More Time’.

Liné: “Going to USSA, I now have a better understanding of what pressure is, and how to make better decisions. We will still make use of our Kovsies brand of Hockey, which is our passing game, and apply all aspects to the best of our ability.”

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