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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

Splendid Summer Graduation concludes 2014 ceremonies

2014-12-11

Photo Gallery Afternoon session; Morning session
YouTube

On Thursday 11 December 2014, the university awarded a total of 392 qualifications during our Summer Graduation Ceremony in the Callie Human Centre on the Bloemfontein Campus. Of these, 225 were awarded to graduates from the Faculty of Health Sciences, while 134 master’s degrees and 33 PhDs were awarded in the other six faculties. Another 74 diplomas and 56 certificates were also awarded in the School for Open Learning.

Well-known radio personality, Redi Thlabi, and acclaimed cardiothoracic surgeon, Dr Susan Vosloo, encouraged and inspired the graduates during the two ceremonies on the day.

During the morning session, Thlabi imparted some of the valuable lessons she learned in her personal life as well as in her career. She encouraged graduates to change the script of our country for future generations, to be mindful of others and to find meaning in whatever you do.

“Those who have a platform, a voice and an education have the power to help others further on their journey,” Thlabi said. “I believe we are living in an exciting time – a time to leave a legacy behind, a time to make a mark in this world.”

Graduates from the Faculty of Health Sciences and the School for Open Learning were addressed by Dr Vosloo during the second ceremony.

Dr Vosloo often referred to the success of transformation at our university and added that few successes are achieved without adversity. She encouraged the afternoon’s graduates to become professionals with a high sense of dignity, accountability and transparency in their workplace.

“Remember that you and you alone are able to decide what your approach will be in anything in life from here on forward,” she said.

Dr Vosloo, a Kovsie alumnus, graduated in 1980. Shortly after this, she became the first female heart surgeon in South Africa. She is currently in independent private practice at Christiaan Barnard Memorial Hospital, having also worked from 1998 untill 2012 at the Vincent Pallotti Hospital in Cape Town.

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