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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 management praise dean for achievement

2004-08-17

Prof Letticia Moja was praised by Prof Frederick Fourie, Rector and Vice-Chancellor of the University of the Free State (UFS), and other members of management today for winning the education category of this year’s Shoprite Checkers/SABC2 Woman of the Year Award.

“We are extremely proud of Prof Moja with this prestigious achievement. It is also a feather in the cap for the UFS that our leaders are being recognised on a national level,” said Prof Fourie.

Prof Moja was appointed as Dean of the Faculty of Health Sciences at the end of last year, becoming the first woman to be appointed in this position at any medical faculty in the country.

“Prof Moja was nominated by her colleagues at the faculty. It is heart-warming to me that she made such an impact in the faculty in the short period since she was appointed as dean to be nominated for this prestigious award,” said Prof Fourie.

“On the nomination form, her colleagues wrote: ‘Prof Moja is not only a remarkable woman, but also a person with gifted qualities of leadership, dedication and compassion. She is blessed with the ability to listen to others, is an extremely reliable person and a competent leader’ – this makes her, in my view, a true winner”, said Prof Fourie.

Prof Moja was recently chosen as vice-president of the Health Professions Council and also serves on the Medical and Dental Board. Her involvement in these councils and committees enables her to represent women in general, as well as previous minority groups.

Prof Moja headed the Gynaecologic Oncology Unit at the Ga-Rankuwa Hospital in Pretoria from 1997 to February 2002, where after she was appointed as Vice-Dean at the UFS’s Faculty of Health Sciences and at the end of 2003 she was appointed in her current position. During her career, she has attended four international and eight local congresses, presented eight oral papers and four posters, was an author to one publication, co-authored four publications, was a guest editor to one publication and supervised three postgraduate publications.

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