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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

Graduation ceremony awaited with great excitement

2011-06-22

Everything is running according to plan on the Bloemfontein Campus of our university for the graduation ceremony of Ms Oprah Winfrey, which is taking place in the Callie Human Centre today, 24 June 2011.

The graduation ceremony, during which an Honorary Doctorate in Education will be conferred upon Ms Winfrey, promises to be something special. Measured against the smooth course of the preparations, the speed at which the tickets were obtained and the continuous interest amongst UFS staff and students, as well as members of the public, this promises to be a real 2011 highlight for all who are going to attend the event.

Strict safety and security measures shall be enforced and therefore, ticket holders are requested to make sure that they arrive early on the Bloemfontein Campus.

The UFS is aware of the fact that tickets are sold illegally at shopping centres in Bloemfontein. Computicket equipment shall be used on the premises tomorrow to ensure that only persons who have original tickets in their possession are admitted. People found to be in possession of forged tickets tomorrow shall be prosecuted.

The doors of the Callie Human Centre shall open at 13:00 on Friday for ticket holders and shall be closed strictly at 14:00. For safety and security reasons, nobody shall be allowed to enter or leave the building after the doors were closed.

Although the entrance gates to the Bloemfontein Campus shall not be closed, certain streets on the campus will be closed for some time today (23 June 2011) and the whole of Friday (24 June 2011). More information about this is available at www.ufs.ac.za

Clear signs, as well as voluntary staff, shall guide parking visitors to their parking spaces. The volunteers were selected after staff of all three campuses offered their assistance for the day.

Amongst the 4 500 guests attending the graduation ceremony are various well-known personalities and dignitaries, alumni, learners and other stakeholders of the university. Good reaction has also been received from the local, national and international media.

The programme in the Callie Human Centre is as follows:

13:00 Doors open
14:00 Doors close
14:30 Opening performances
15:30 Graduation ceremony
16:00 Ms. Winfrey’s speech and question and answer session with students
18:00 Programme ends.

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