The aim of the present study was to assess the effects of changes in temperature in combination with Cu pollution on soil communities and processes/functions. A soil multi species system (SMS)was designed consisting of six species representing different functional groups in a “food web design” community. This food web community was exposed to a range of temperatures (from mean annual values to extreme summer temperatures for Denmark) in a non-contaminated and a historically Cu-contaminated field soil(Pedersen et al., 1999). The measured parameters included speciesabundance, feeding activity and organic matter turnover