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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

Culture contributes to success of UFS rugby teams

2015-12-15

The Sevens team of the University of the Free State followed in the footsteps of the Shimlas when the team was crowned national champion. The Kovsies Sevens team beat Tukkies April in the final of the Varsity Sevens tournament. Photo: Supplied.

The University of the Free State (UFS) Rugby Club has succeeded once again in creating a culture of values.

Marius van Rensburg, Chairman of the UFS Rugby Club, believes this was one of the reasons why Kovsies had so many rugby successes this year.

The UFS knows that money, which is more abundant at bigger universities, won't change the club into a rugby force, but "there is something special here," he said.

Van Rensburg added that the success of Shimlas, who won the Varsity Cup for the first time, also helped to build a winning culture.

Seven finals

Seven of the UFS Rugby Club's teams played in finals during 2015.

Shimlas beat the Pukke in the Varsity Cup final at Shimla Park on the Bloemfontein Campus.

The Kovsie Young Guns (against Tukkies) and Vishuis (Mopanie from Tukkies) got stuck in Bloemfontein in Varsity Cup finals.

The Shimlas won Section B of the USSA tournament in Johannesburg (against Madibaz in the final).

A strong Irawa rugby team beat Shimlas in the City Cup.

The Kovsie Sevens team was crowned as the Varsity Champions in Cape Town after beating Tukkies in the final. The team was beaten by Maties in the final of the USSA Sevens tournament in George.

Shimlas lays foundation

According to Van Rensburg, the Varsity Cup triumph by Shimlas laid a good foundation.

“After what happened in the Varsity Cup, the winning culture kind of washed over the other teams,” he said.

He also thinks the 2015 successes didn't happen overnight, but that the club managed to bring back good values. He feels that Franco Smith, the former Shimlas coach who is the Cheetahs’ current coach, also played an important part.

Greater pressure in 2016

In 2016, the UFS's rugby teams will have a greater target on their backs.

Van Rensburg agrees that there will be greater pressure, but the structures are in place.

He feels that Varsity Cup success goes together with a touch of luck, of which Shimlas had some this year.

“Looking at the draw, Shimlas will play their first two matches away against Ikeys and Tukkies. Therefore, after two matches, one might have no league points, and that would place the team under immediate pressure.”

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