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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

Cardiology Unit involved in evaluation of drug for rare genetic disease
2013-01-04

Front from the left, are: Marinda Karsten (study coordinator and registered nurse),
Laumarie de Wet (clinical technologist), Charmaine Krahenbuhl (study coordinator and radiographer),
Lorinda de Meyer (administrator), Andonia Page (study coordinator and enrolled nurse);
back Dr Gideon Visagie (sub investigator), Dr Derick Aucamp (sub investigagtor),
Prof. Hennie Theron, (principal investigator) and Dr Wilhelm Herbst (sub investigator).
Photo: Supplied
09 January 2013


The Cardiology Research Unit at the University of the Free State (UFS) contributed largely to the evaluation of the drug Juxtapid (lomitapide), which was developed by the Aegerion pharmaceutical company and approved by the FDA (Federal Drug Administration). Together with countries such as die USA, Canada and Italy, the UFS’ Unit recruited and evaluated the most patients (5 of 29) for the study since 2008.  

The drug was evaluated in persons with so-called familial homozygous hypercholesterolemia (HoFH).  

Following its approval by the FDA, Juxtapid is now a new treatment option for patients suffering from HoFH. The drug operates in a unique way which brings about dramatic improvements in cholesterol counts.  

According to Prof. Hennie Theron, Associate Professor in the Department of Cardiology at the UFS and Head of the Cardiology Contract Research Unit, HoFH is a serious, rare genetic disease which affects the function of the receptor responsible for the removal of low-density lipoprotein cholesterol (LDL-C) (“bad” cholesterol) from the body. Damage to the LDL receptor function leads to extremely high levels of blood cholesterol. HoFH patients often develop premature and progressive atherosclerosis, which is a narrowing or blockage of the arteries.  

“HoFH is a genetically transmitted disease and the most severe form of hypercholesterolemia. Patients often need a coronary artery bypass or/and aortic valve replacement before the age of 20. Mortality is extremely high and death often occurs before the third decade of life. Existing conventional cholesterol-lowering medication is unsuccessful in achieving normal target cholesterol values in this group of patients.  

“The only modality for treatment is plasmapheresis (similar to dialysis in patients with renal failure). Even with this type of therapy the results are relatively unsatisfactory because it is very expensive and the plasmapheresis has to be performed on a regular basis.  

“The drug Juxtapid, as currently evaluated, has led to a dramatic reduction in cholesterol values and normal values were achieved in several people. No existing drug is nearly as effective.  

“The drug represents a breakthrough in the treatment of familial homozygous hypercholesterolemia. The fact that it has been approved by the FDA, gives further impetus to the findings,” says Prof. Theron.  

In future further evaluation will be performed in other forms of hypocholesterolemia.  

According to Prof. Theron, the findings of the study, as well as the recent successful FDA evaluation, once again confirms the fact that the UFS’ Cardiology Contract Research Unit is doing outstanding work.  

Since its inception in 1992, the Unit has already been involved in more than 60 multi-centre, international phase 2 and 3 drug studies. Several of these studies, including the abovementioned study, really affected the way in which cardiology functions.  

The UFS’ Cardiology Contract Research Unit is being recognised nationally and internationally for its high quality of work and is constantly approached for their involvement in new studies.  

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