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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

Quantity Surveying celebrates many firsts

2014-10-20

From the left are: Pierre Oosthuizen, Prof Kajimo-Shakantu and Dr Stephan Ramabodu
Photo: Ifa Tshishonge

The Department of Quantity Surveying at the University of the Free State (UFS) has much to be proud of. With Prof Kahilu Kajimo-Shakantu as Head of the Department of Quantity Surveying, the department is celebrating several firsts.

For the first time, the department has four academics with PhDs. This includes Prof Kajimo-Shakantu, Dr Stephan Ramabodu, Dr Timothy Froise and Dr Benita Zulch. It is also the first time that this department is managed by a woman.

Furthermore, the Department of Quantity Surveying has performed very well at this year’s national Quantity Surveying Conference held in Pretoria, where they walked away with four of the seven awards.

The awards were:

•   Best presenter: Pierre Oosthuizen (lecturer)
•   Most innovative presenter: Pierre Oosthuizen (lecturer)
•   Best paper on engineering projects: Prof Kahilu Kajimo-Shakantu
•   Best academic paper: T Monyane (postgraduate student) and Dr Stephan Ramabodu (lecturer)

The South African Council for the Quantity Surveying Profession (SACQSP) also presented two prestigious life achievement awards. One of these were bestowed upon Prof Basie Verster from the UFS for his contribution to quantity surveying since the 1970s.

The university is especially proud of Dr Stephen Ramabodu, lecturer in the Department of Quantity Surveying, who completed his PhD this year. This makes of him the highest qualified quantity surveyor in the department and one of only a few holders of a quantity surveying PhD in the country. Dr Ramabodu is also registered with the South African Council for Quantity Surveying Professionals.

Prof Kajimo-Shakantu said the following of Dr Ramabodu. “Since 2002, Stephan was appointed as a lecturer in a programme called Grow Your Own Timber at the UFS. Later on, he went to Cape Town to gain some commercial experience, where he worked for Davis Langdon in 2005. In 2008, he returned to the Free State, where he established Ramabodu & Associates. Later on in the same year, he returned to the UFS as a lecturer to complete all the remaining milestones of the Grow Your Own Timber programme.

“The university looks forward to Stephen’s increased responsibilities and contributions, not only in teaching and learning, but also in research, mentoring and community engagement.”

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