Biodiversity of ground beetles in the Picardy poplar plantations (Coleoptera Carabidae). The populiculture is often blamed in the management of the wetlands. Indeed some wetland assemblages are directly threatened by anthropic disturbance.However, there is only a few data on poplar assemblages and in particular on the insect fauna. A study was carried out from 2001 to 2003 to evaluate the ground beetle diversity of poplar stands in Picardy. First this article provides the list and the ecology of the inventoried species, and then considers some abiotic factors involved in the carabid biodiversity of poplar plantations in Picardy.