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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

Inaugural lecture: World on verge of agricultural revolution
2008-05-19

A changing economic climate and new technology will see to a number of interesting changes in the livestock industry in the next few years. This is according to Prof. Frikkie Neser of the Department of Animal and Wildlife and Grassland Sciences, who delivered his inaugural lecture at the UFS on the subject: “The quest for a superior animal”.

Prof. Neser focused on the future of animal breeding in the next few decades.

He said the world, but especially South Africa, stand on the verge of a revolution in the agriculture sector. The whole production scenario will probably change. The high fuel and food prices are the two biggest factors that will play a role.

“Increasing fuel prices opened the door for the production of bio-fuel. The fuel industry is in direct competition with humans and the livestock industry for the same resource that result in unbelievable high prices for maize, sunflower and soya. These prices can further increase with the worldwide shortage of food,” he said.

More profitable breeds could take the place of existing breeds because of the big increase in input costs, he said. “Selection for more effective, and not maximum production, will became more important.

“There are also indications of pressure on feed lots. If this industry downsizes, it could lead to a total turnaround in the beef industry. The feed lots prefer a later maturing animal that can put on a lot of weight before fat is laid down. If this industry declines, early maturing breeds and some of the synthetic breeds, as well as crossbreeding with early maturing breeds, will play a more prominent role in the meat industry.

“This will also lead to a decline in the total number of animals in order to prevent overgrazing. This can result in an increase in imports from neighbouring countries and especially Brazil, where production costs are much lower.

“One way to increase the profitability of meat production is to utilise niche markets. There is world-wide a shift to more natural products. The demand for grass-fed beef drastically increased. According to research it is healthier than meat from feed lots and usually free of hormones and antibiotics. If factors such as traceability are put in place, this could be a very profitable niche mark for the South African meat industry,” he said.

Prof. Neser also said: “In order for breeding societies to survive they need to increase the number of members and the animals that are being registered. This they do by replacing the word stud with recorded animals. Hereby they open the door for excellent commercial animals to become part of the seed-stock industry. Another benefit is that especially in the smaller breeds more information becomes available, resulting in more accurate breeding values.”

Prof. Frikkie Neser.

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