Waterweed identification made easy!
Identify waterweeds and report your observations! As part of the BB Alien project, an identification and information chart on waterweeds was produced. It is available as a PDF and can be freely viewed or printed. The card is available in three languages: English, Finnish and Swedish.
How can you identify waterweeds and how do they spread? Why are they a threat to native biodiversity? And how can you avoid unintentionally spreading them yourself? The information card provides concise answers to these and other key questions about these invasive alien species.
Waterweeds are invasive alien species spreading in the Nordic countries. There are two concerning species: Nuttall’s waterweed (Elodea nuttallii) and Canadian waterweed (Elodea canadensis). They grow as submerged plants in freshwater lakes, ponds and rivers, but can also thrive in brackish water. Their rapid growth and spread can displace native species and hinder the recreational use of water bodies.
Download the information chart here: