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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

Prestigious awards, membership and two A-ratings from the NRF indicate a boom in research

2014-12-04

Several UFS researchers were honoured with awards this year. This includes, from the left: Prof Jeanet Conradie from the Department of Chemistry, Dr Aliza le Roux from the Department of Zoology and Entomology on the Qwaqwa Campus of the UFS, Profs Jonathan Jansen, Vice-Chancellor and Rector of the UFS.
Photo: Hannes Pieterse

The University of the Free State (UFS) had several highlights in the field of research this year. This includes two A-ratings, which were awarded by the National Research Foundation (NRF) to Prof Maxim Finkelstein from the Department of Mathematics and Actuarial Science, and Prof Melanie Walker, Senior Research Professor and Director of the Centre for Research on Higher Education and Development (CRHED) and DST/NRF Chair in Higher Education and Human Development.

Prof Finkelstein’s A2-rating makes him the only A-rated researcher in ‘Probability and Statistics’ regarding Mathematical Sciences in the country. Prof Walker was evaluated in the division for Research, Innovation Support and Advancement and received an A1-rating.

Prof Jonathan Jansen, Vice-Chancellor and Rector of the UFS, considers these ratings as one of the clearest signs that the standard for research across the institution has increased significantly.

Prof Jansen was honoured with the Academy of Science of South Africa’s (ASSAf’s) Science-for-Society Gold Medal for his outstanding achievement in scientific thinking to the benefit of society.

"An award such as this recognises the power of science and scholarship to improve the human condition," Prof Jansen said.

A further highlight at ASSAf’s prestigious annual awards ceremony was the induction of Prof Jeanet Conradie from the Department of Chemistry and Dr Aliza le Roux from the Department of Zoology and Entomology on the UFS’s Qwaqwa Campus as new members of ASSAf.

Prof Conradie was also this year’s first runner-up in the senior category for Distinguished Women Researchers: Physical and Engineering Science in the Department of Science and Technology’s 2014 Women in Science Awards.

Prof Corli Witthuhn: Vice-Rector: Research, describes Prof Conradie as a highly productive researcher who publishes in high-impact journals.

“Not only is she the first female professor in the Department of Chemistry, but she also has extensive international networks and collaboration which elevates the impact of her work even further,” Prof Witthuhn said.

Dr Le Roux is one of ten young researchers inaugurated as members of the South African Young Academy of Science (SAYAS). She was also elected to serve on the executive committee of SAYAS. According to Prof Witthuhn, Dr Le Roux is an outstanding young scientist.

“I am very excited about the young researchers on our Qwaqwa Campus, with Aliza as one of the leaders, and I am looking forward to what they will achieve in the next five years,” she said.

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