Dr ir Henrice Jansen

SpecialityWageningen Marine Research, Yerseke. Henrice.jansen@wur.nl

How can we stimulate the development of aquaculture in a sustainable way and thus contribute to food security in the Netherlands, Europe and worldwide? That is the driving force behind the work of Dr. Henrice Jansen. In recent years she has been actively involved in shellfish research at WMR. Hereby within the KOMPRO program she focuses on, among other things, the strategic questions that mussel farming entails in a natural ecosystem. Subjects that are central to this are ecosystem services, nutrient dynamics, carrying capacity, biodiversity, and sediment disruption. In this capacity, she is also closely involved in developments in the mussel covenant. In addition to shellfish research, she also conducts research into the ecological integration of seaweed farming in the Delta and the North Sea. Henrice has conducted her PhD research in Norway, where she has studied nutrient dynamics and bearing capacity of Norwegian mussel farming. To date, she is still active in Norway, where she is researching the environmental effects of salmon farming and the development of integrated aquaculture where salmon farming is combined with shellfish, seaweed and worm farming. There is also a strong link with partners in China in research into integrated aquaculture. In addition to the research, she is also a board member of the EAS (European Aquaculture Society) and she participates in the Scientific Council of Zeeland.

Title: Climate robust farming: shellfish such as carbon and nitrogen sink

With the national Climate Agreement, the government has a central goal: to reduce greenhouse gas emissions in the Netherlands. The agreement contains a multitude of agreements to combat greenhouse gas emissions. Among other things, there is talk about the optimal organization of water (and land) focused on carbon fixation, and the development of seaweed cultivation is mentioned as an opportunity to capture CO2. Can the breeding of shellfish also contribute to this? That is the question that will be central to this presentation. During the growth of shellfish, carbon is captured in the shell and in the “meat” (the edible part of the shellfish). However, during growth, CO2 is also excreted by, for example, breathing. During the presentation, an overview will be given of the processes that determine the net carbon capture during shellfish production, and an estimate will be given of the carbon captured by Dutch mussel farming. Ecosystem services also have an economic value, which in this case is expressed as “carbon credits”. In the event of a possible scaling up of shellfish production to promote carbon fixation, attention must also be paid to the natural values ​​of the ecosystem in which farming takes place. These economic and ecological themes will be discussed. In addition to capturing carbon (C), much attention has recently been paid to nitrogen deposition (N). How does this connect with shellfish farming and are there opportunities here? This question will also be dealt with in this presentation.