Affiliation: | (1) Central Laboratory of General Ecology, Bulgarian Academy of Sciences, 2 Gagarin Street, 1113 Sofia, Bulgaria;(2) Science - Art Faculty, Department of Biology, Uludag University, Bursa, Turkey;(3) Department of Ecology, University of Plovdiv `Paisi Hilendarski', 24 Tzar Asen Street, Plovdiv, Bulgaria |