Blå Roxen: A community-driven local initiative for eutrophication control using invasive water plants
The local sailing club in Linköping, Sweden, has noticed the invasive Elodea water plants gradually take over their home waters in the lake Roxen.
In the summer of 2019, things suddenly grew worse than ever before. One day several sailing boats, and even the sea rescue team that came to help, were stuck in the seaweed until midnight. Something had to change, and the club members started looking for a way out.
The solution they came up with was Blå Roxen, a project to study methods to use the water plants as a tool for eutrophication control and a biogas substrate source. Financing was obtained from SwAM and Linköping municipality, to harvest at least 40 tonnes per year for a 3-year period and the first harvest will be in August 2020. Data on costs, methods, quality, species composition of the harvest and environmental impact will be collected and made available to the community. Local stakeholders will be invited twice yearly to share knowledge and discuss the progress of the project.