Royal Netherlands Institute for Sea Research
Phone number
+31 (0)113 57 7487
Location
Yerseke
Function
Research Leader
Expertise
  • Biogeochemical cycles
  • Sediment-water interactions
  • Environmental modelling
  • Scientific computing
  • Open source software (R)

Prof. Dr. Karline Soetaert

Research Leader

Computer science reveals the significance of field observations

After studying zoology at Ghent University, biologist Karline Soetaert gradually specialised in computer science as well. ‘Unfortunately, the value of mathematics is still underestimated! I have learnt to appreciate computer science and mathematics as the instruments that enable us to really understand the data. We can collect as much data as we want, but we can usually only understand it after it has been inserted in mathematical models.’

Pulse fishing

‘One of the fields that I recently performed calculations on was the effect of fishing that disrupts the seabed. For some time now, Dutch fishermen have been allowed to fish using electrical fishing gear, the so-called pulse fishing. We examined the effects of the various types of fishing gear on the ploughing of the seabed and the release of carbon, nitrogen and phosphorus from the sediment. The analyses of field observations reveal that fishing gear that moves just above the seabed and that uses electrodes to startle the fish is somewhat less harmful to the seabed than traditional fishing gear with heavy tickler chains.'

Wind farms and seaweed farms

‘We also perform calculations on the effects of mussel farming or seaweed farms in the Eastern Scheldt. Both have an effect on the spread of nutrients in the water. In combination with hydrodynamic models, geochemical and ecological models can reveal the effects of these activities on the delta ecosystem.’

‘The growing number of wind farms on the North Sea will also have an impact on the geochemistry and consequently on the biology of the sea. Mussels grow on the masts of wind turbines and filter particles from the water. Additionally, the functioning of the seabed will change due to the arrival of all those hard structures.’

From physics to ecology

‘In hydrodynamic models, we work with physical processes such as the flow of water. These models have already demonstrated their value. The next challenge is to capture ecological processes in mathematical terms that are just as reliable, so that we can also predict the effects of our interventions on the ecology in a responsible manner before we cause irreversible effects.

Read more +

Research interests

I am interested in the interplay between physics, ecology, and biogeochemistry in the marine environment. I have worked on many topics, including deepsea nematodes, estuarine zooplankton, estuarine biogeochemistry, early diagenesis, benthic and pelagic foodwebs, environmental modelling, software development and differential equations. Usually there is some computational aspect involved in my work -this may be in the form of mechanistic (ecosystem) models, or some other number-crunching procedure that involves computers and programming.  Indeed, my favorite working spot is behind my computer, although the occasional field work definitely has its charm!

Below you find a word cloud based on my work.

Research statement

I am a firm believer of open, transparent and reusable science, which –in my view- should include documenting the entire chain of research, from data up to the publication. This involves sharing also the raw data and the software and scripts that compute on these data.

Open science starts with open source software, so for more than 10 years, I have contributed to the open source software community, creating around 20 R-packages that are available on CRAN. To make the every-day scientific data analysis or modelling process open and reproducible, I use R with markdown – this creates documents that contain the programming codes and the output they generate (a concept known as literate programming).  You can check out this website, where you can find scripts how to visualise complex multidimensional datsets in R, using one of my R-packages. 

Research tools

For me, data and models are equally important tools to understand the natural environment. Whether I will rely more on one or the other depends on many things, including the discipline that I deal with. For instance, in the marine realm, physics is well represented by the (hydrodynamical) models, but in ecology, we lack the mechanistic understanding to allow prediction.

This means that, although my main expertise is in modelling, you can find me in the field as well, for instance for working on intertidal flats (in the picture below with Tom Ysebaert and Dunia Rios Yunes - thank you Tom!).

 

Tom, me and Dunia after work on intertidal flats near Shanghai
Tom, me and Dunia after work on intertidal flats near Shanghai

I can also be found on board of a ship or a boat, e.g. for work in Greenland (below with Ulrike Braeckman and Lorenz Meire).

With Ulrike and Lorenz, after sediment sampling in Greenland.
With Ulrike and Lorenz, after sediment sampling in Greenland.

You can read my blog on my Northsea cruise in 2017m if you want to know what a cruise at sea looks/feels like...

Short CV

I hold a master degree in Zoology (1983), a master in Computer Sciences (1985) and a PhD in biology (1988), all from Ghent University.

I have written in the order of 200 scientific publications, 20 software packages and 2 books. A list of my scientific output/achievements can be downloaded here.

In 2024 I was elected a member of the Academia Europaea (MAE).

My two books deal with modelling, the green one from an ecological, the orange one from a mathematical perspective.
My two books deal with modelling, the green one from an ecological, the orange one from a mathematical perspective.

Teaching

I teach environmental modelling at the University of Ghent, for the first-year master “Global Change Biology” and for the first-year master “Oceans and Lakes”.  I also hold a chair in marine ecosystem modelling at the Geosciences department at Utrecht University. My teaching focusses mainly on model development, and I use both the flipped classrom concept and blended learning. Here you can find more info about my teaching principles.

The course I teach in Utrecht (Reaction Transport Modelling) is available as an R-package that can be downloaded from github; this package is called: RTM. It contains links to videos, tutorials, quizzes, and the exercises that our students need to make during the course. 

 

 

Finished projects

The projects that I worked on (2016-2022) are summarised in the infographics below, and can be visited from our northsea website.

infographics of recent research in the Northsea (from www.northsea-research.com)
infographics of recent research in the Northsea (from www.northsea-research.com)

 

Recently started projects

Several new projects started in 2022-2023, where I am the PI; here you see a collage of them:

Projects that started in 2022.2023
Projects that started in 2022.2023

 

Science meets art

Sometimes a  nice illustration draws more attention than a scientific article. To showcase our Northsea research, we created a website (https://www.northsea-research.com ) where we use illustrations, video’s, and computer games to tell about our work.

Start of a virtual tour displaying my Northsea work
Start of a virtual tour displaying my Northsea work

Take a virtual tour on the RV Pelagia, and admire our work during a cruise on the Northsea (follow the arrows!), or play the foodweb game (Dutch only).

Miscellaneous

My job is not my only hobby! I play the cello (learnt this as an adult), and used to play the clarinet (as a child). In 2016 I started playing the viola, and since 2022 I also play the violin.

Bach is my favorite composer, Massive Attack my favorite modern band.

I enjoy my medium-large, wild and natural garden, and like to spend time on my mountain bike – for sports and because it takes me to some wonderful places.

Linked news

Wednesday 21 February 2024
Stronger storms free more nutrients from mud flats
If storms become stronger in the future due to climate change, more nitrogen may be released from the bottom of coastal seas. This is shown by research of marine biogeochemist Dunia Rios-Yunes at The Netherlands Institute for Sea Research (NIOZ) in…
Wednesday 31 January 2024
Cold-water coral traps itself on mountains in the deep sea
Corals searching for food in the cold and dark waters of the deep sea are building higher and higher mountains to get closer to the source of their food. But in doing so, they may find themselves trapped when the climate changes. That is shown in the…
Thursday 12 October 2023
Deep sea research shows self-organising tiger patterns in cold water coral reefs
For the first time, proof has surfaced that even cold water coral reefs that live in the cold and dark deep sea, grow in self-organised patterns. Such pattern formation is a ’trick’ that enhances the resilience of ecosystems under changing…
Tuesday 21 February 2023
Developing digital twins to help understand ecosystems
LTER-LIFE aims to study and predict how global change affects ecosystems. It is one of nine projects that have just won Dutch funding earmarked for setting up and improving large-scale research infrastructure. LTER stands for Long-term Ecosystem…
Friday 29 July 2022
How coastal seas help the ocean in absorbing carbon dioxide from the atmosphere
The biologically productive North Sea impacts the global climate through exchange of carbon and nutrients with the Atlantic Ocean. A Dutch consortium of scientists will investigate how big this role of the North Sea really is. Under the leadership of…
Monday 23 May 2022
Pulse trawl had less effect on bottom than traditional fishing gear
When beam trawlers use a regular fishing gear to fish on a 'reef' of sand tubeworms, this has more effect on bottom life than when an electropulse gear is used. This is shown by a comparative study by marine biologist Justin Tiano of NIOZ and…
Tuesday 22 March 2022
Four years research into the effects of sand extraction in the North Sea
In the coming years, a broad consortium of research institutes and companies will be working on the ecological optimisation of sand extraction in the North Sea. "The aim is to keep the marine ecosystem healthy", says Karline Soetaert, researcher at…
Thursday 11 November 2021
Oceans of Energy will build 1 MW offshore solar off the coast of Scheveningen
Scheveningen, The Netherlands; November 11, 2021 - Today Oceans of Energy and partners & observers announce the upscaling of the world's first offshore solar farm system 20 times and expand it to 1 MW (MegaWatt). In the coming years, the company…
Thursday 10 June 2021
Sponges on valuable nodules enable high biodiversity ocean floor
Researchers from NIOZ and Germany have discovered that sponges, which like to settle on metallic nodules on the ocean floor, also provide a home for many other animals. Without the sponges, species richness in these deep-sea regions would be…
Friday 30 April 2021
Trawl fishing leads to decreased nutrient cycling in sediments
Bottom trawling leads to lower nutrient levels and loss of invertebrate life in the upper sediment layer, and thus to a poorer seafloor. These are the conclusions from a model study of Royal NIOZ postdoctoral researcher Emil De Borger and colleagues.…

Linked blogs

Tuesday 02 October 2018
NIOZ@SEA | Ecologisch onderzoek in de Nederlandse delta’s
De ecosystemen in de Oosterschelde, Grevelingen en Haringvliet zijn aan het veranderen door de invloed van onze Deltawerken, maar ook door klimaatverandering. In de Oosterschelde verdrinken de zandplaten langzaam door zandhonger, de bodem in het…
Thursday 26 October 2017
NIOZ@SEA | EXPEDITION NORTH SEA PROJECT SANDBOX
Similar as on land, sunlight is an essential ingredient of life in the seas: it heats up the water and is needed for the tiny algal cells in the water to grow. Sediment particles floating in the water block the light and therefore interfere with…
Tuesday 13 June 2017
NIOZ@Sea: North Sea expedition
Seven PhD students, three senior scientists, two assistants and the 12-headed Pelagia crew will embark on a scientific research cruise to the North Sea in the first two weeks of June.

NIOZ publications

  • 2024
    Braeckman, U.; Soetaert, K.; Pasotti, F.; Quartino, M.L.; Vanreusel, A.; Saravia, L.A.; Schloss, I.R.; van Oevelen, D. (2024). Glacial melt impacts carbon flows in an Antarctic benthic food web. Front. Mar. Sci. 11: 1359597. https://dx.doi.org/10.3389/fmars.2024.1359597
    Chevalier, S.; Beauchard, O.; Teaca, A.; Soetaert, K.; Grégoire, M. (2024). Partial recovery of macrozoobenthos on the northwestern shelf of the Black Sea. Mar. Pollut. Bull. 207: 116857. https://dx.doi.org/10.1016/j.marpolbul.2024.116857
    Ghorai, B.; Tiano, J.C.; Molenaar, P.; Soetaert, K.; Keetels, G. (2024). Predicting the penetration depth and towing resistance of beam trawl fishing gears in sand. Mar. Georesour. Geotechnol. early view: 1-14. https://dx.doi.org/10.1080/1064119x.2024.2361009
    Rijnsdorp, A.D.; Boute, P.G.; Tiano, J.C.; de Haan, D.; Kraan, M.; Polet, H.; Schram, E.; Soetaert, M.; Steins, N.A.; Lankheet, M.J.; Soetaert, K. (2024). Electrotrawling can improve the sustainability of the bottom trawl fishery for sole: a review of the evidence. Rev. Fish Biol. Fish. 34(3): 959-993. https://dx.doi.org/10.1007/s11160-024-09867-x
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    Tiano, J.; De Borger, E.; Paradis, S.; Bradshaw, C.; Morys, C.; Pusceddu, A.; Ennas, C.; Soetaert, K.; Puig, P.; Masque, P.; Sciberras, M. (2024). Global meta‐analysis of demersal fishing impacts on organic carbon and associated biogeochemistry. Fish Fish. 25(6): 936-950. https://dx.doi.org/10.1111/faf.12855
    van der Kaaden, A.-S.; Maier, S.R.; Chen, S.; De Clippele, L.H.; de Froe, E.; Gerkema, T.; van de Koppel, J.; Mienis, F.; Mohn, C.; Rietkerk, M.; Soetaert, K.; van Oevelen, D. (2024). Building your own mountain: the effects, limits, and drawbacks of cold-water coral ecosystem engineering. Biogeosciences 21(4): 973-992. https://dx.doi.org/10.5194/bg-21-973-2024
    van der Kaaden, A.-S.; van Oevelen, D.; Mohn, C.; Soetaert, K.; Rietkerk, M.; van de Koppel, J.; Gerkema, T. (2024). Resemblance of the global depth distribution of internal-tide generation and cold-water coral occurrences. Ocean Science Journal 20(2): 569-587. https://dx.doi.org/10.5194/os-20-569-2024
    Zhang, T.; Rios-Yunes, D.; Tian, B.; Liu, D.; Liu, Q.; Soetaert, K.; Zhou, Y.; van der Wal, D. (2024). Hyperspectral remote sensing of chlorophyll a and pheophorbide a pigments for macrobenthos mapping on an estuarine tidal flat. Ecol. Indic. 169: 112850. https://dx.doi.org/10.1016/j.ecolind.2024.112850

Linked projects

UUNIOZ_Greenland fjords as gateways between the ice sheet and the ocean
Supervisor
Karline Soetaert
Funder
Utrecht University
Project duration
1 Jan 2021 - 31 Dec 2025
NoSE_North Sea Atlantic Exchange
Supervisor
Matthew Humphreys
Funder
Netherlands Organization for Scientific Research
Project duration
1 Oct 2022 - 31 Dec 2027
NWO SANDBOX_Smart and sustainable design for offshore operations in a sandy seabed
Supervisor
Karline Soetaert
Funder
Netherlands Organization for Scientific Research
Project duration
28 May 2015 - 31 Aug 2019
EMODnet_The European Marine Observation and Data Network - part biology
Supervisor
Karline Soetaert
Funder
European Community
Project duration
19 Apr 2017 - 18 May 2019
PULS_Impact Assessment of Pulstrawl Fishery (IAPF)
Supervisor
Karline Soetaert
Funder
Wageningen Marine Research
Project duration
1 Jan 2016 - 31 Dec 2019
UUNIOZ_Impact of microphytobenthos
Supervisor
Karline Soetaert
Funder
Utrecht University
Project duration
1 Jan 2021 - 31 Dec 2025
UUNIOZ_Greenland fjords as gateways between the ice sheet and the ocean
Supervisor
Karline Soetaert
Funder
Utrecht University
Project duration
1 Jan 2021 - 31 Dec 2025