The excretion of ammonium by enchytraeids (Cognettia sphagnetorum)

► Ammonium excretion of enchytraeids can be quantified directly. ► Ammonium excretion of enchytraeids is temperature dependent. ► Daily excretion rates can be estimated for field populations of enchytraeids. ► The annual ammonium excretion was about 0.3 g N m−2 in Danish heathland.