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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

Staff member gets fellowship for HIV prevention advocacy
2008-08-01

Ms Estelle Heideman, HIV/Aids Co-ordinator at the Lengau Agriculture Development Centre of the University of the Free State (UFS), was awarded a fellowship under a leadership initiative in the United States of America (USA). It entails an eight-week training programme to help cultivate women leaders in South Africa who will make major contributions to HIV prevention advocacy at the local, regional and national levels. The programme is underwritten by the MAC AIDS Fund and managed by the HIV Centre for Clinical and Behavioral Studies at Columbia University in New York City and the UCLA Program in Global Health at the University of California in Los Angeles. Fellows will participate in an orientation overview, attend regular scheduled prevention seminars and policy meetings, and hold meetings with mentors. At the conclusion of the programme, the leadership initiative will, amongst other benefits, provide funds for fellows to carry out their prevention programme in South Africa. Ms Heideman, in collaboration with the university’s Chief Directorate Community Service and Free State Rural Development Programme, has been working on a number of farms in the southern Free State since 2006. The prevention plan that captured the interest of the US panel of judges is an eight-week programme among farm workers in the Philippolis district with the aim to equip them to take control of their lives by knowing their HIV status and living a healthy lifestyle.
Photo: Supplied
 

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