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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.

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"Studies indicate disability, poverty and inaccessibility to healthcare are intricately linked " - expert opinion by Dr Magteld Smith
2014-12-03

Dr Magteld Smith

Programmes worldwide attempt to improve the lives of people with disabilities, but recent studies indicated that disability and poverty, as well as disability and the inaccessibility of health care, continues to go hand in hand.

In South Africa, and even in developed countries, research shows that people with disabilities achieve lower levels of education with higher unemployment rates, live in extreme poverty and have low living standards.

“To have a disability can therefore become a huge financial burden on either the disabled person, the family or caregivers,” says Dr Magteld Smith from the Department of Otorhinolaryngology.

She devotes her research to the medical-social model of the global organisation, the International Classification of Functioning, Disabilities and Health, focusing on all areas of deafness.

Furthermore, Dr Smith says it is more difficult or more expensive for people with disabilities to obtain insurance, because of the risks associated with disability.

Dr Smith also emphasises the inaccessibility and even unavailability of medical services or health care for people with disabilities.

“Services such as psychiatry or social services are often not accessible. When such services are available, it is not affordable for most people with disabilities.”

Dr Smith uses the example of a person who was born deaf:

“Doctors have limited knowledge of the different types of hearing impairments or how to read and interpret an audiogram. Very little understanding also exists for the impact of deafness on the person’s daily life.”

Dr Smith, who is deaf herself, describes the emotional state of mind of people with disabilities as a daily process of adjustment and self-evaluation.

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