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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

Top matriculants for Kovsies

2014-01-24

From left are: Saneliswe Khambule, Lungile Mkhungo, Jannie de Wet, Anje Venter, Siqiniseko Buthelezi and Abrille Beukes.
Photo: Hannes Pieterse

Hailing from top schools in KwaZulu-Natal (KZN), Naushad Mayat, Lungile Mkhungo and Siqiniseko Buthelezi share 20 distinctions between them. Leaving the province of the Zulu Kingdom for Bloemfontein, all three are at Kovsies to study as doctors.

Naushad obtained eight distinctions, an achievement that placed him in the top ten matriculants in KwaZulu-Natal. The former learner from Glenwood High School in Durban came fourth in the Umlazi District and tenth overall in the province. Enrolling for a degree in Medicine, he will join the list of outstanding health professionals Kovsies produce every year.

Lungile, who matriculated from Kingsway High School, attained seven distinctions and her average percentage was 90%. She received distinctions in English – 90%, IsiZulu – 94%, Mathematics – 83%, History – 92%, Physics – 89%, Life Sciences – 89% and Life Orientation – 93%. Lungile is not only clever, but also performed well in sports at her school, participating in netball, soccer and athletics. This future doctor is a proud resident of Wag-'n-Bietjie residence.

Siqiniseko made history at his school, Maritzburg College, becoming the first black Head Prefect at the 150-year-old school, the oldest boys' high school in KZN and one of the oldest schools in South Africa. A gifted learner excelling in sport, culture and academics, Siqiniseko obtained five distinctions (English, Afrikaans, Life Orientation, Accounting and Life Sciences). His sporting prowess has seen him captaining Maritzburg College's first rugby team, as well as the KZN Academy team.

The three are joined by fellow KwaZulu-Natal resident, Saneliswe Khambule, Namibian Abrille Beukes and Free Staters Anje Venter and Jannie de Wet.

Saneliswe, a former learner of Menzi High School in Umlazi, received five distinctions in her final-year exams. The Emily Hobhouse resident registered for a Forensic Science degree and plans on doing her doctoral studies in this exciting career field.

Abrille Beukes is another future doctor and is all the way from Windhoek in Namibia. Abrille obtained a ‘one’ in all her subjects, the highest possible mark in the Namibian school system. The Windhoek-born student received high levels in Mathematics, Accounting, Physical Science, Biology, Afrikaans and English. As second best student in her home country, she will register for a Medicine degree.

Anja, the Free State’s top achiever, received an average percentage of 93% in the matric final exams. The former Eunice student obtained nine distinctions, an achievement that placed her in the national top 100 matriculants. Anja enrolled for a BSc Actuarial Science degree and will be joined in class by former school friend, Jannie de Wet, who obtained a whopping ten distinctions. Jannie and Anja attended Universitas Primary School together, with Jannie finishing his school career at Jim Fouché High School, and just like Anja, he will also enrol for a BSc Actuarial Science degree.

Jannie obtained distinctions in Afrikaans, English, Mathematics, Mathematics (third paper), Life Orientation, Accounting, Physical Science, Life Science, Economics and Information Technology. Jannie is also the Volksblad and the University of the Free State’s 2013 Matriculant of the Year.

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