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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 withdraws interdict against SASCO and ANCYL

2003-11-25

The Rector and Vice-Chancellor of the University of the Free State, Prof Frederick Fourie, announced today that a court order against the South African Students Congress (SASCO) and the ANC Youth League (ANCYL) had been withdrawn.

The withdrawal of the court order follows after a written statement by SASCO and the ANCYL in which they “unconditionally withdraw or retract statements threatening to render the institution ungovernable” and give their “commitment not to proceed with our threats to establish our own democratic SRC and occupy the current SRC offices”.

The UFS management obtained the court order in October after SASCO and the ANCYL refused to accept the outcome of the recent student referendum and SRC elections and threatened to disrupt the campus.

Prof Fourie also welcomed the undertaking by SASCO and the ANCYL to act in accordance with the prescribed procedures to resolve any grievance that the organisations may have, saying the UFS management remains committed to a constructive dialogue with all student organisations to manage a campus of diversity, tolerance and non-racialism.

In September students voted in a referendum to test support for a system of proportional representation (PR) for the SRC. A vast majority of students voted against the PR system, a system favoured by SASCO and the ANCYL..

Following allegations of fraud in the referendum, the UFS management asked the auditing firm PriceWaterhouseCoopers to conduct an independent audit of the ballot papers.

The auditors found that a total of 180 ballot papers out of 3513 – only 5.12% - of the votes cast - appeared to have been altered by means of erasing and then changing the student number.

According to the auditors, with all potentially altered and suspicious ballot papers excluded, a huge majority of 60,8% of students voted against the proportional representation system.

A few days after the referendum, the actual SRC election was held. However, at no stage were there any complaints from any organization about the integrity of the SRC election itself.

Despite this and the findings of the auditors, SASCO and the ANCYL refused to accept the outcome.

Law student Quintin du Plessis was elected SRC president. He welcomed the stance taken by SASCO and the ANCYL to pursue their objectives through the existing structures and said the SRC was always willing to engage with these organisations on issues of student governance.

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