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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

UFS hosts the first Southern African Young Scientists Summer Programme
2012-11-26

The University of the Free State is to host the first Southern African Young Scientists Summer Programme (SA-YSSP) from 1 December 2012 to 28 February 2013. 

This will form part of an annual three-month education, academic training and research capacity-building programme jointly organised by the National Research Foundation (NRF), the Department of Science and Technology (DST), and the International Institute for Applied Systems Analysis (IIASA), based in Austria.
 
The NRF, as the National Member Organisation (NMO), in collaboration with DST, has developed a novel and innovative initiative with IIASA to establish the SA-YSSP. This programme was officially launched by the Minister of Science and Technology during November 2011.
 
IIASA is an international research organisation that conducts policy-oriented scientific research in the three global problem areas of energy and climate change, food and water and poverty and equity (www.iiasa.ac.at). South Africa’s engagements with IIASA, and specifically with regard to the SA-YSSP, relate primarily to the DST’s Ten-Year Innovation Plan.
 
Aligned with the YSSP model that is presented by IIASA in Austria annually, the SA-YSSP offers scientific seminars covering themes in both the social and natural sciences. These seminars often have policy dimensions and aim to broaden the participants’ perspectives and strengthen their analytical and modelling skills, further enriching a demanding academic and research programme (www.ufs.ac.za/sa-yssp).
 
Keynote lectures are to be delivered by national and international leaders in their respective research fields, partly drawn from IIASA’s widespread network of alumni and collaborators, as well as from the NRF’s extensive international networks of excellence.
 
The programme is to be enhanced with specific field trips and cultural and heritage excursions that will involve networking with locally based research programmes. Supervisory teams of both IIASA and South African experts will guide a cohort of competitively selected South African and international advanced Ph.D candidates.
 
The programme will be opened on 2 December 2012 at the Centenary Complex by the Minister of Science and Technology, Mr Derek Hanekom, the Director/CEO of IIASA, Prof Pavel Kabat and the Vice-Chancellor and Rector of the UFS, Prof Jonathan Jansen. They will be joined by a number of Nobel Prize Laureates and luminaries representing the government, the diplomatic sector and Higher Education.
 
The programme is directed by a multidisciplinary team at the UFS that includes:
Prof Aldo Stroebel and Prof Neil Roos (Co-Directors)
Prof André Roodt (Dean of SA-YSSP)
Prof Martin Ntwaeaborwa and Dr Henriëtte van den Berg (Deputy-Deans of SA-YSSP)
Dr Priscilla Mensah and Dr Sonja Loots (Strategic Managers)

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