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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

Meet the person behind the title – your new FaceOfFacebook

2015-04-29

Kovsies #FaceOfFacebook was born three years ago out of a need to engage with students, and become a virtual friend. Auditions are held every year to choose the new ‘face’ representing the UFS on Facebook. The successful candidate holds the title as #FaceOfFacebook for the next 12 months, attending events, and filming short video clips to post on our Facebook page.

The votes have been counted, and we have a winner. After much excitement and a close contest, Nompumelelo Maseko (whose name, fittingly, means ‘success’) emerged victorious from the top six contestants selected by our panel of judges. We sat down with the soft-spoken Mpumi – as her friends call her – to get a sense of the person who will be our ambassador for the next year.

What is your field of study, and how far along are you?

I am studying for a BSc degree in Genetics, and I’m currently in my second year. I have a particular interest in the forensic sciences, which fascinate me!

Are you originally from Bloemfontein?

No, I am originally from Pretoria.

How is it that you ended up here, studying at the UFS?

Before leaving school, I applied to various universities, but my desires and ambitions brought me here.

How do you find your residence?

Akasia ladies are big on sisterhood, very supportive. Res life is very enjoyable.

What do you hope to accomplish during your term as the #FaceOfFacebook?

I would like to help people become aware of what is taking place on campus. There are many opportunities to be more engaged with what is happening at the varsity. For instance, there are still many people who don’t really know what the #FaceOfFacebook is, and I would like to help inform them about it.

What is your motivation in your studies, in taking part in this contest, and in life?

I am intrigued by the function of life forms, the differences that exist at a cellular level.
For this competition, I fed off my love of people, even though I am shy. I also enjoy presenting.

I have my parents to thank as my motivation, as well as meeting and engaging with people. I find that I achieve a broader perspective when I don’t restrict myself to my own opinions, but strive to be open to differing views.

Nompumelelo will be appearing in one of her first Facebook videos shortly, so be sure to keep an eye on our Facebook page.

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