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21 April 2023 | Story Leonie Bolleurs | Photo Supplied
Dr Katlego Mashiane
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

Summer programme a first outside Austria
2012-12-06

 

Mr Derek Hanekom, Minister of Science and Technology
Foto: Johan Roux

05 Desember 2012

People often fight about their differences, like skin colour, religion and more. “These differences are minute. We must celebrate our common ancestry and commit ourselves to a common destiny. Your work can make a difference.” This is according to Mr Derek Hanekom, Minister of Science and Technology.

He opened the Southern African Young Scientists Summer Programme (SA-YSSP) at the Bloemfontein Campus on Sunday 2 December 2012. The UFS is the first institution outside Austria to host the Summer Programme. A total of 19 young researchers from 17 countries will be hosted by the UFS until 28 February 2013. Researchers in the programme are, among others, from South Africa, Egypt, China, Italy, Sweden, Iran, Hungary, India, the USA and Indonesia.

The programme will form part of an annual three-month education, academic training and research capacity-building programme jointly organised by the International Institute for Applied Systems Analysis (IIASA), based in Austria, the National Research Foundation (NRF) and the Department of Science and Technology (DST). 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. South Africa’s engagements with IIASA, specifically with regard to the SA-YSSP, relate primarily to the DST’s Ten-Year Innovation Plan.

Mr Hanekom spoke about the impact the growing global population, which is expected to grow from 7 billion in 2012 to 9 billion in 2050, has on natural resources. “We use purified water to flush our toilets while other people do not have clean drinking water. We cannot carry on like this. Somewhere it must stop, if we do not want to be responsible for the 6th great extinction. We must know how our systems impact on each other.

“We can do things differently and better and should endeavour that other people enjoy luxuries we take for granted,” he said.

He urged the researchers to believe that they can make a difference, share knowledge and translate the knowledge into plans.

Prof. Dr Pavel Kabat, Director/CEO of IIASA, said the summer programme was presented outside Austria for the first time, with plans to expand to Brazil and China in future. Twenty countries are represented on the IIASA board, with more than 3 000 researchers associated with the organisation.

IIASA was launched in 1972 in the days of the Cold War as a “science bridge” between the West and the Soviet Union. It served as a “think tank” for various issues that needed to be resolved. Its mission was reconfirmed after the fall of the Berlin Wall in 1989.

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