Abstract: Enikő NÉMET, Bálint MARKÓ, Eszter Ruprecht & László GALLÉ Enikő Német, Dr. Bálint Markó (contact author), Dr. Eszter Ruprecht, Department of Taxonomy and Ecology, Babeş-Bolyai University, str. Clinicilor nr. 5-7, 400006 Cluj-Napoca, Romania. E-mail: nemeteniko@yahoo.com; mbalint@biolog.ubbcluj.ro; ruprecht@grbot.ubbcluj.ro Prof. Dr. László Gallé, Department of Ecology, University of Szeged, 6721 Szeged, P.O.Box 51, Hungary. E-mail: galle@bio.u-szeged.hu Myrmecol. News 10: 114 Comparative analysis of insect communities is a frequently applied approach in ecological monitoring studies. Ants are one of the most abundant insect groups and they occur almost in every type of terrestrial habitat, which makes them perfect candidates for the subject of such studies (GALLÉ 1991, Agosti & al. 2000, VEPSÄLÄINEN & al. 2000). As significant proportions of agricultural lands are abandoned nowadays the study of insect versus plant community succession on such old-fields could help us understand how these lands transform and eventually return to a semi-natural state (Dauber & al. 2006).…