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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

UFS blows the whistle on crime

2014-03-28

At the event were, from the left: Refiloe Seane, Director: Student Counselling and Development; Anastasia Sehlabo, SRC member for Accessibility and Student Support. Back, from the left: Melissa Barnaschone, Student Counselling and Development; and Mokgawa Kobe, Director: Protection Services.
Photo: Leonie Bolleurs

First-year students receive 1 000 whistles in project to combat crime.

Numerous safety measures were implemented by the University of the Free State in the past five years to ensure the safety of all the students and staff on all three campuses of the UFS. A large area of the UFS Campus is covered by security cameras. Red poles, equipped with panic buttons that can be activated to call for help, were also erected across the campuses.

At the beginning of 2013, as a further safety measure, whistles were handed out to female students in residences.

At an event on 26 March 2014, Refiloe Seane, Director: Student Counselling and Development, together with her team, handed over 1 000 whistles to the Student Representative Council to be distributed to first-year students. The whistles were sponsored by Prof Nicky Morgan, Vice-Rector: Operations and Mokgawa Kobe, Director: Protection Services.

“Female students are encouraged to use the whistles to call for help when they feel unsafe or are in danger. The objective is, firstly, to discourage criminals without suffering any negative consequences, and secondly, to get the attention of security or any other form of assistance,” said Melissa Barnaschone, Student Counselling and Development.

At the event, Mokgawa said: “The moment you blow this whistle, you say to the potential criminal:

I hate what you do
I will not keep quiet about it
I am doing something against crime.”

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