Latest News Archive

Please select Category, Year, and then Month to display items

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

New digital planetarium first of its kind for Sub-Saharan Africa

2013-10-10

Mr Andrew Johnson, Sky-Skan engineer, explains how the dataprojector of the new digital planetarium functions.
10 October 2013

The University of the Free State (UFS) is the first in the world to boast a modern digital planetarium which was erected within an existing observatory.

It is also the first planetarium of its kind for Sub-Saharan Africa.

“What makes the project unique is the fact that we convert the existing observatory structure into a modern digital planetarium. It hasn’t been done anywhere else,” says Andrew Johnson, engineer at Sky-Skan, the company supplying the equipment and also installing it.

Andrew has worked on similar projects, with his company installing digital planetariums around the world.

What makes the planetarium so special is the fact that it offers visitors an inclusive experience.

“Previously visitors could only watch projected stars and constellations, but with the digital planetarium they can now experience a journey through space which feels very close to reality.”

Andrew points out that, apart from stargazing and travelling through space, the digital planetarium allows the audience to visit planets, explore the secrets of the oceans or even organs in the human body.

The planetarium will also be used for concerts, state-of-the-art presentations, theatre productions, as well as meetings, conferences and exhibitions.

The auditorium can seat approximately 90 adults or 120 children.

The digital dome that was recently fitted into the existing observatory structure, is a 12-metre seamless aluminium screen complemented by a powerful surround-sound system and multiple data projectors from Sky-Skan. This results in an immersive experience of the digital universe, as well as the recreation of the macro and micro cosmos an a variety of other environments.

The planetarium will be officially opened on Friday 1 November 2013 by Derek Hanekom, Minister of Science and Technology. Prof Matie Hoffman from the Department of Physics at the UFS is delighted at this visit from Minister Hanekom.

“This recognition and national interest demonstrates the importance and contribution of the first digital planetarium in Sub-Saharan Africa to science and astronomy. It is also evidence that a facility like this is important for the training of the next generation of scientists.”

Back

Economic and Management Sciences

Education

Health Sciences

The Humanities

Law

Natural and Agricultural Sciences

Theology and Religion

Open Distance Learning

Business School

We use cookies to make interactions with our websites and services easy and meaningful. To better understand how they are used, read more about the UFS cookie policy. By continuing to use this site you are giving us your consent to do this.

Accept