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01 April 2019 | Story Leonie Bolleurs | Photo Sonia Small
Summer School
Perspectives on aquatic biomonitoring from Germany and Southern Africa were discussed at the recent German-Southern African Summer School 2019.

Water is a basic resource upon which communities rely for their health, well-being, and economic development and growth. Many countries struggle with the negative consequences of poor surface-water quality, which may threaten their food security and livelihoods.

The Centre for Environmental Management at the University of the Free State recently co-presented the German-Southern African Summer School 2019 with the Dresden University, Germany, on its Bloemfontein Campus. 

Discussions at the Summer School – attended by 66 delegates from Germany and Southern Africa – mainly focused on aquatic biomonitoring and included perspectives from Germany and Southern Africa. 

Questions such as ‘How to improve water quality?’ and ‘What about the impact of the catchment area, land use, and agriculture on water quality?’ were discussed. 

According to Marinda Avenant, Lecturer in the Centre for Environmental Management, a two-pronged approach is often used: first, ecosystem-based biomonitoring, and second, specialised water quality and toxicity-assessment methods applied at specific sites in order to identify problems.

Presenters from academia, government authorities, and the private sector shared theoretical concepts and practical experiences of establishing aquatic biomonitoring networks in Germany, South Africa, Namibia, Lesotho, Eswatini (Swaziland), and Zambia. 

The Summer School focused on an integrated approach, including catchment processes, hydrology, geomorphology, and land use, as well as chemical and biological monitoring. 

Delegates also undertook a field trip to Mokala National Park for a practical demonstration of water-quality monitoring as part of the programme. 

The Volkswagen Foundation (Germany) funded the Summer School.


News Archive

Plant eco-physiologist finds effective solutions for crop optimisation
2016-07-24

Description: Orange trees Tags: Orange trees

The bio-stimulant was tested on
this citrus. This is the first time
that the product has been tested
on a crop.

In a time characterised by society facing increasing population growth, food crises, and extreme climatic conditions such as drought, it is essential for farmers to integrate science with their work practices in order to optimise crops.

Role of photosynthesis and plant sap data

By knowing how to use photosynthesis and plant sap data for determining plant health, fast and effective solutions could be established for the optimisation of crops. This technique, which could help farmers utilise every bit of usable land effectively, is the focus of Marguerite Westcott’s PhD study. She is a junior lecturer and plant eco-physiologist in die Department of Plant Sciences at the University of the Free State.

Westcott uses this technique in her studies to prove that a newly-developed bio-stimulant stimulates plants in order to metabolise water and other nutrients better, yielding increased crops as a result.

Agricultural and mining sectors benefit from research

The greatest part of these projects focuses on the agricultural sector. Westcott and a colleague, Dr Gert Marais, are researching the physiology of pecan and citrus trees in order to optimise the growth of these crops, thus minimising disease through biological methods. Field trials are being conducted in actively-producing orchards in the Hartswater and Patensie areas in conjunction with the South African Pecan Nut Producers Association (SAPPA) amongst others.
 
The principles that Westcott applies in her research are also used in combination with the bio-stimulant in other studies on disturbed soil, such as mine-dump material, for establishing plants in areas where they would not grow normally. This is an economical way for both the agricultural and mining sectors to improve nutrient absorption, stimulate growth, and contribute to the sustainable utilisation of the soil.

Description: Pecan nut orchards  Tags: Pecan nut orchards

The bio-stimulant contributes to the immunity of the plants.
It was tested in these pecan nut orchards (Hartswater).

Soil rehabilitation key aspect in research projects

“One of two things is happening in my research projects. Either the soil is rehabilitated to bring about the optimal growth of a plant, or the plants are used to rehabilitate the soil,” says Westcott.

Data surveys for her PhD studies began in 2015. “This will be a long-term project in which seasonal data will be collected continuously. The first set of complete field data, together with pot trial data, will be completed after the current crop harvest,” says Westcott.

 

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