1. STRUCTURE AND DYNAMICS OF THE ZOOPLANKTON COMMUNITY IN THE ŞTIUCII LAKE (NORTH-WESTERN ROMANIA). Authors: TRAIAN BRAD.2. MICROBIAL COMMUNITIES IN PERCOLATING WATER IN CAVES OF PĂDUREA CRAIULUI MOUNTAINS (NW ROMANIA). Authors: OANA TEODORA MOLDOVAN, VASILE MUNTEAN, IOANA MELEG, ADRIANA BICA, TRAIAN BRAD.3. OXIDATIVE STRESS ENZYMES AS BIOMARKERS OF HEAVY METAL POLLUTION IN INTERSTITIAL INVERTEBRATES. Authors: OANA T. MOLDOVAN, TRAIAN BRAD, MANUELA BANCIU, HORIA L. BANCIU, MARA RUSU.4. MICROBIAL ACTIVITY IN CAVES FROM PĂDUREA CRAIULUI MOUNTAINS (NW ROMANIA). Authors: MIGNON SEVERUS ŞANDOR, DIANA POP-SUGAR, SUZANA ANDRUŞ, TRAIAN BRAD, VASILE MUNTEAN.