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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.

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Increase in external research funding is proof of confidence in UFS

2014-12-09

The university’s sourcing of research funding from external organisations has received a significant boost this year. The growth in financing received from the National Research Foundation (NRF) alone increased from R24 million in 2013 to over R50 million in 2014.

“Because tertiary institutions can no longer survive on state subsidies alone, they are increasingly looking at alternative ways of supplementing their income. Income from these sources is utilised for various programmes and projects, with strong emphasis on research,” says Dr Glen Taylor, Senior Director: Research Development at the University of the Free State (UFS).

A source which provided considerable income for the UFS was the presentation of short learning programmes. The growth in income for the learning programmes this year was more than 30% compared to the income in 2012. “Income from short learning programmes is used to support the core business of the UFS,” says Dr Taylor.

A number of major research contracts were entered into during the course of the year. The UFS, for example, serves as an agency for a research contract of USD$10.5 million awarded by the World Bank to the Southern African Development Corporation (SADC). The contract is managed by the Institute for Groundwater Studies (IGS) and involves research on the management and formation of policies on underground water sources across boundaries.

Another substantial grant is the financing received from the Water Research Commission. The money is used to conduct research on the sustainable utilisation of water, as well as ways for the better utilisation thereof for the development of communities. The grant to the UFS for successful projects amounts to R5.5 million on average per year.

The UFS also has contracts with national and international partners. We conduct research of more than R30 million on the behalf of several mining companies, such as Anglo American, BHP Billiton, Exxaro and Goldfields Ltd. “Furthermore, we also have research funding from the National Institute of Health (NIH) in the USA, the European Union and several bilateral research agreements with countries such as Brazil, China and India, as well as contracts with Sasol and the Agricultural Research Council (ARC),” says Dr Taylor.

“We have tremendous interest from several companies wishing to finance the programmes, projects and intellectual property of the UFS, which is proof that our research is recognised and makes a difference,” he says.

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