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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

MSc student plans to FEED our hungry planet

2015-01-27

Photo: Hannes Pieterse

Since attending the 2014 Youth Ag-Summit in Canada, Lisa Coetzee – an MSc student in Plant Pathology in the Department of Plant Sciences at our university – developed a plan to address hunger:

FEED – Forum of Education, Empowerment and Development.

Coetzee, together with a junior lecturer at Plant Sciences, Marguerite Westcott, started this student association to tackle the issue of food insecurity head-on.

Education, empowerment and development “are keywords vital to the solutions to poverty. Hunger is an issue which is found in our own homes. One in every four South Africans is food insecure. Hunger kills more people every year than Aids, malaria and TB combined,” says Coetzee.

“This forum allows awareness to be raised about the hunger situation locally and globally. FEED is talking about hunger and it is assisting in reducing it by reaching out to communities which are in need.

“FEED is the generation which is going to make a difference in eradicating hunger,” Coetzee continues. “We want students to think about how they can feed the hungry through what they are studying”. For Coetzee it is a high priority to ensure that the youth are aware of the importance to feed our hungry planet in a sustainable way.

Her philosophy on relieving hunger and increasing food safety is to enhance the efficiency of crop production, ensure crop security and reduce mycotoxins in the food we eat.

During the 2014 summit, Coetzee was elected to represent the African delegates on the Youth Ag Summit Committee. Ever since, she has been enthusiastically active in the agricultural community. As 43% of the globe’s farmers are women, Coetzee also feels she acts as a voice for female farmers in South Africa.

An important lesson Coetzee has learned is that there is power in one person to make a change – that we should start small but think big.

If you would like to get involved in this project, contact Lisa Coetzee on +27(0)51 401 9681 or email coetzeela@ufs.ac.za.

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