Wetlands are effective – on average the removal efficiency is 40%.

A widely used method for reducing the input of nutrients into freshwater and marine environments is to allow contributing water to pass through a created or restored wetland. Mistra EviEM has assessed the evidence and concluded that this intervention generally works well. The variation between wetlands is however large, and to obtain significant effects it is important to carefully consider where and how the wetland is constructed.

More projects

Reviews

Photo: Tore Hagman/N.

SR9 Roadside management

EviEM has initiated a systematic review of how species diversity and species dispersal along roadsides are affected by various kinds of management.

Foto: iStock

SR11 Time series data

Farming practices can affect the amount of carbon stored in soil. EviEM is reviewing time series data about farmland management methods affect soil organic carbon.

The elk (Alces alces) is one of the most important browsers in Swedish forests. Photo: Anna Fuster/Creative Commons.

SR13 Forest grazing

Review of how changes of the grazing and browsing pressure by game and livestock affect forest plants and invertebrates.

A forest fire in progress. Copyright: Dmytro Gilitukha, from iStockphoto

SR15 Prescribed burning

EviEM synthesises evidence on how prescribed forest burning affect species that do not directly depend on fire or the dead wood that fires provide.