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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

Diversity gains ground in SRC election

2005-08-19

The University of the Free State (UFS) reached another milestone in its transformation process last night (Tuesday 16 August 2005) when a more diverse group of students than ever before were elected to serve on the Main Campus SRC.

In addition to this, the UFS experienced a smooth and problem-free election process – unlike recent years when the Main Campus SRC elections were frequently disrupted or marred by attempts of intimidation or obstruction.

The election took place on Monday 15 August 2005 and the results were announced last night (Tuesday 16 August 2005) by Dr Ezekiel Moraka, Vice-Rector: Student Affairs at the UFS.

Seven black students are to serve on the Main Campus SRC, the highest number of black students ever to be elected on the Main Campus SRC since black students were admitted to the UFS in the late 1980’s.

Nine of the 18 SRC members were directly elected and nine on the basis of proportional representation (PR). The PR system was introduced after amendments to the constitution of the Main Campus SRC were approved by the UFS Council in June 2005.

According to Dr Moraka the elections on the Main Campus were a resounding success. “We received double the amount of votes this year: A total of 4 846 votes were cast, while 396 votes were spoilt. Last year only 2 192 votes were cast,” said Dr Moraka.

Dr Moraka said that there were no disruptions of the process and no objections regarding the voting process were received.

Mr Graeme Bradley, thirdyear student in B Com Human Resource Management, was elected as SRC President of the Main Campus for 2005/2006. Mr Bradley was SRC representative for Sports, Arts and Culture in 2004/2005.

In the PR section of the election, Here XVII (with 36,1% of the vote) and Sasco (with 36% of the vote) received an equal amount of seats (3) for the SRC. These percentages also provided them with fourteen (14) seats for the Student Parliament, which consists of 40 seats.

“This outcome is significant to us as, for the first time we have a clear indication of what the actual support of these affiliated organisations is on campus,” said Dr Moraka.

Media release

Issued by:  Lacea Loader
   Media Representative
   Tel: (051) 401-2584
   Cell: 083 645 2454
   E-mail: loaderl.stg@mail.uovs.ac.za

17 August 2005

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