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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 responds to media reports about UFS101

2012-08-18

The UFS101 is a cross-disciplinary module of the University of the Free State (UFS) that encourages critical thinking and offers access to knowledge beyond the specific qualifications for which students are registered. This is a multi-disciplinary academic curriculum that includes topics in astronomy, nanotechnology, history, law, anthropology and religion.

Throughout the seven units students are taught to think broadly rather than narrowly, and critically rather than through rote-learning.

The core curriculum module raises some difficult questions about science, humanity and the universe that have occupied human beings for centuries. There is considerable effort put into the module to enable balance, respect, and independent thinking. Students are not taught what to think but are offered different perspectives on difficult issues.

“In my unit on the question ‘how should we deal with the past?’ every effort is made for students to examine the perspectives on history held by people from different communities in South Africa,” said Prof. Jonathan Jansen, Vice-Chancellor and Rector of the UFS.

Students are then encouraged to speak in class, online and in tutorial groups where they are given ample opportunities to take a position and defend it not through emotion and anger, but through logic and reason.

The objective of the module is to equip students to deal with “the present past” in constructive and empathetic ways. They are also prepared to become active citizens outside the classroom and gain skills they can use anywhere in the world.

Some students find the module difficult at first, since most of them are not used to the practice of critical thinking and dealing with difficult questions from the past, the present and the future. Most students gradually come to enjoy the core curriculum module as they become accustomed to a new style of teaching and learning.

There are 700 first-year modules at the UFS. This is the only one module offered to students in English so that all students, local and international, can engage with one another directly on the subject matter discussed in the module. However, the module material is also available in Afrikaans online.It is a pity that AfriForum Jeug Kovsies did not discuss their concerns with the presenters of the module, but chose to do it through the media.

It is a pity that AfriForum Jeug Kovsies did not discuss their concerns with the presenters of the module, but chose to do it through the media.

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