Wetlands near Bergianska, Photo: Eva Dalin
Wetlands near Bergianska, Photo: Eva Dalin

History

It is known that wetlands increase biological diversity and reduce excess nutrient runoff into streams and lakes. Because of this, Sweden and many other countries aim to restore wetlands that were previously filled and drained. In collaboration between the Bergius Botanic Garden and the National Property Board, a new wetland was created in 2009.

A long time ago, the site of the current wetland used to be a wet meadow that was regularly flooded, but ever since the water level of Brunnsviken was lowered and the ground drained to create arable land in 1863, this part of the garden had been more or less dry. In 2009, soil was thus removed to create a depression where surface water from the surrounding area could be collected. This created a body of water that followed the slope of the area. The dykes were filled in, an embankment was built towards Brunnsviken, and a pump system was installed to regulate the water level if necessary.

What is here today

Plants: The damp parts on the north-east side have wetland plants, such as iris, sedge, and flowering rush, and there is also a natural establishment of other plants. The field and shoreline on the south-west side of the wetland have been allowed to develop more freely. The surrounding surfaces are mown, and the hay is removed once or twice a year in order to attain a more herb-rich meadow flora.

Animal life: Wetlands attract many birds, amphibians and insects, and more than 60 different species of birds, including nesting lapwings and little ringed plovers, were spotted here already in the first season.

Fun facts

Those interested in learning more about the wetland while walking around the area can make use of the audio guide that is available for mobile phones.

Link to the wetland audio guide:
www.onspotstory.com/sv/audioguide/sv/1079/Vatmarken-i-Bergianska-tradgarden