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Curiosity about environmental changes drives Dr Katlego Mashiane’s PhD research

21 April 2023 | Story Leonie Bolleurs | Photo Supplied

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

RC members of Armentum not expelled from residence

2009-05-29

According to a memorandum of agreement that was concluded between the University of the Free State (UFS) and the Residence Committee (RC), the Senior Bond Committee and seniors of the Armentum Residence, the parties involved agreed, among others, that the RC members of this residence would not be expelled from the residence.

This follows an incident during which a first-year student from Armentum, Alex Marais, was injured because of alleged initiation and admitted to the Bloemfontein Medi-Clinic.

According to the agreement, the RC members will resign from their positions and not make themselves available for the next RC election, with the exception of Mr M.J. Pretorius, the RC member for Rag. He will stay on as unelected member of the interim RC. The UFS undertook to pay the RC that is stepping down their honorariums honorariums in August.

The UFS also gave permission to the Residence Head of Armentum, Adv. Bradley Smith, to appoint an interim RC for the remaining period of office of the current RC.

The Senior Bond must also undertake to submit the current rules of the Senior Bond Committee to the Acting Rector, Prof. Teuns Verschoor, before 1 June 2009. The Senior Bond Committee undertakes to comply strictly with these rules, also during Senior Bond activities.

In addition the Senior Bond Committee and the current Residence Committee must submit the following information to Prof. Verschoor before the reopening of the UFS for the second semester :
- The current orientation practices with regard to first-year students.
- Proposals on how the practices can be adjusted to render them enforceable within humane, reasonable, fair and humanitarian limits in order to implement and comply with the objectives of orientation, the exercising of control and the laying down of rules.

The compensating fine that was levied against the tuition fees accounts of senior students of Armentum, which would have been used to contribute to the medical costs of Alex Marais, is now cancelled.

This settlement is final and the parties will not lay any claims against each other as a result of this incident in future.

Media Release:
Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
Email: radebemt.stg@ufs.ac.za
29 May 2009

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