Invasive species are commonly found in marine areas around the world, including Swedish waters. Invasive species can outcompete native species, reduce biodiversity, and alter marine habitats. However, they can also have a value for consumers. In the project, we study the costs and benefits of the spread of the invasive Pacific oyster along the Swedish west coast. The species has shown significant growth in recent years and now constitutes two-thirds of the biomass of mussels and oysters in the area. The Pacific oyster is often found in shallow waters along, for example, beaches, which reduces the possibilities for swimming due to the risk of getting cut by the sharp shells. At the same time, the oyster is excellent to eat and is farmed internationally for consumption. Data collection is done through surveys to examine how the problem of oyster spread is perceived and how consumers view eating the oyster from both a culinary and an environmental perspective.

The project is funded within the Biodiversa+ research program and is a collaboration with several European universities. The project will be completed by 2028.