Dr. Johannes J. Viljoen

Postdoctoral Researcher at the University of Exeter, Penryn - Biological Oceanography & Marine Biogeochemistry

About


I am a researcher in the fields of Biological Oceanography and Marine Biogeochemistry, with a focus on the dynamic interactions between marine phytoplankton and nutrients. My research aims to enhance our understanding of phytoplankton dynamics and its changes in a warming ocean, given its crucial role in modulating global biogeochemical cycles.
I earned my PhD from the Department of Earth Science at Stellenbosch University, South Africa, under the supervision of Dr. Susanne Fietz. My doctoral research centered on investigating the complex relationships between marine phytoplankton and micronutrients (trace metals) in the Southern Ocean, providing critical insights into the nutrient dynamics and biogeochemical cycles of this vital region. During my time at Stellenbosch University I also gained sea-going research experience on a number of long expeditions to the Southern Ocean in winter and summer seasons.
Currently, I am a Postdoctoral Research Associate at the University of Exeter, Penryn Campus and a BioGeoSCAPES Fellow. I am actively involved in the UKRI-funded project Phytoplankton Response to Climate Change (PRIME), led by Dr. Bob Brewin. My work at the Centre for Geography and Environmental Science within the Department of Earth and Environmental Science focuses on understanding how phytoplankton communities respond to climate change. This research is essential for predicting future changes in marine biogeochemical.

Publications

Generating open-source 3D phytoplankton models by integrating photogrammetry with scanning electron microscopy


X. Sun, R.J.W. Brewin, C. Hacker, J.J. Viljoen, M. Li

Frontiers in Microbiology, vol. 15, 2024, p. 1429179


Superyachts could support satellite ocean colour validation


Robert Brewin, Xuerong Sun, Dirk A. Aurin, Johannes J. Viljoen, Christopher Walsh, Shubha Sathyendranath

Frontiers Remote Sensing, vol. 5, 2024


Latitudinal variability and adaptation of phytoplankton in the Atlantic Ocean


R Barlow, T Lamont, J Viljoen, R Airs, R Brewin, G Tilstone, J Aiken, E Woodward, C Harris

Journal of Marine Systems, vol. 239, Elsevier, 2023, p. 103844

Blog Posts


Oct 1, 2024

A Day on the Antarctic Shelf

During the summer months, sunlight is a constant in Antarctica and the Southern Ocean surrounding our driest continent. It was during this season, in 2016, that I had the amazing opportunity to join the SANAE 56 relief voyage to Antarctica as a ship-ba...


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Contact


Johan Viljoen

Postdoctoral Researcher in Biological Oceanography & Marine Biogeochemistry



Department of Earth and Environmental Science

University of Exeter, Penryn

Penryn Campus
Penryn
TR10 9EZ
United Kingdom


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