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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

Women must fight for equal opportunities - Motshekga

2010-08-06

Photo: Stephen Collett

“We will not know peace and prosperity unless all women are free. We must open opportunities for women and make sure that we achieve the necessary progress. I believe this would be the best way to honour the life of Charlotte Maxeke.”

This rallying call for action was made by the Minister of Basic Education, Ms Angie Motshekga (pictured), in her speech to commemorate the life of Charlotte Maxeke, a woman she described as “a heroine” to all South Africans.

The University of the Free State (UFS), in conjunction with the Free State Premier’s office, presented the annual Charlotte Maxeke Memorial Lecture at the Main Campus in Bloemfontein to once again honour this remarkable African woman as part of celebrating Women’s Month.

“We must ensure that we act consciously to extend equal opportunities, freedom and justice to all women,” she said. “We must put all our energies together in this task of uplifting women and children.”

She said that even though women had made considerable strides since the advent of democracy in South Africa, especially in government, much still had to be done to ensure equal opportunities for all women.

“There’s a 40% women representation in government, but the question we should ask ourselves is: What value does this representation bring to the life of an ordinary woman? What impact does it have on her life?” she asked.

She said women were still less represented in managerial positions. “Sexism requires the same amount of energy that we use to fight against racism,” she said.

She also announced that the government had decided to declare the graves of Charlotte Maxeke, Lillian Ngoyi and Helen Joseph as national heritage sites.

The well-attended lecture was entitled: United in action to make 2010-2020 a decade for women in Africa.

Among those present were members of the ANC Women’s League, who came in buses and mini-buses; Dr Allan Boesak and his wife; past and present Free State MECs; and the Vice-Rector of External Relations at the UFS, Prof. Ezekiel Moraka.

Media Release:
Mangaliso Radebe
Assistant Director: Media Liaison
Tel: 051 401 2828
Cell: 078 460 3320
E-mail: radebemt@ufs.ac.za
6 August 2010

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