In 1981, the occurrence and abundance of carabid and silphid beetles of the nature reserve „Lengener Meer“, a partly disturbed raised bog, 40 km NW of Oldenburg (northern GFR) were studied in 4 sampling areas characterized by plant communities. The carabid communities of the oligotrophic heather-covered peat areas with Sphagnum papillosum and Sphagnum magellanicum are distinguished from those of ... [Show full abstract] undisturbed bog areas by the occurrence of Pterostichus minor, Agonum fluiginosum and the low abundance of Agonum ericeti. Carabus arvensis and Cychrus caraboides were found in the wet heather-covered peat areas, too. The floating Sphagnum mats of the Lengener Meer are inhabited by Agonum munsteri, Agonum gracile and other carabids. - Silpha carinata, which was abundant during the investigation period, prefers the heather-covered peat areas rather than the floating Sphagnum.