Laboratory for marine microbial ecology …is founded on the long-term experience on biogeochemical as well as microbial processes in pelagic ecosystem. We built our knowledge on examining the physiology of bacteria, phytoplankton and macroalgae by lipidomics approach. Linking it to the long-term research on microbial loop and carbon cycling in the pelagic ecosystem of the northern Adriatic brought us to exploring the microbial interactions in frontal zones of different trophic regimens. Recently we introduced genomics, metagenomics and metatranscriptomics into our physiological studies. We aim to broaden our activities to the interrelationship between ecologically important macroalgal species and their accompanying microbiota, and the changes in their physiology under diverse environmental pressures. In close collaboration with members of other laboratories in CMR we develop an integrative perspective over northern Adriatic coastal ecosystem, its protection and management. Our research activities: Structure of microbial communities (composition, abundance, biomass, production and activity), coupling of bacterioplankton activity and phylogenetic diversity Use of lipids as indicators of source related changes in sediments and sedimenting particles, organic matter transfer through food chains and phytoplankton – bacteria relationship in mucilaginous aggregates and along the gradients in water column. Environmental microbiology; specifically ecological studies on the survival of pathogenic microorganisms in marine environment, assessment of the sanitary water quality, organic matter transfer within microbial food web and biodegradation of organic compounds in marine environment, the role of bacteria in the formation of polysaccharidic and proteinaceous particles, and mucilaginous aggregates Nutrient cycling and enzymatic processes in the pelagic ecosystems Applied research studies: quality-assessment of the farmed fish populations, ecological studies of the influence of the fish- and shell- farming area on the environment, ecological studies of the unusual occurrences that endanger human health, tourism and fishery, physiology and ecology of the invasive macroalgal species Caulerpa taxifolia and Caulerpa racemosa. Most recent projects: 2010 -… Picoplankton function and diversity along the northern Adriatic trophic gradients (PICOADRIF, ADRIS Foundation) 2007 -… Structure and physiology of microbial communities in the northern Adriatic frontal zones (Ministry of science, education and sports of the Republic of Croatia) 1998 - … Croatian national monitoring program «Systematic investigation of the Adriatic sea as a base for sustainable development for the republic of Croatia» (Project «Jadran») 2008 - 2009 Implementation of water quality monitoring in the Western Istrian Coastal Sea (WICOS), Adriatic New Neighbourhood Programme- INTERREG/CARDSPHARE Project 2002 - 2006 Mechanisms of long term changes in the Adriatic sea ecosystem with particular attention to eutrophication and mucilage phenomenon / sea blooming (Ministry of science and technology of the Republic of Croatia) 1999 - 2003 Monitoring project of the Italian Ministry of environment protection “Processes of formation of the mucilaginous aggregates in the Adriatic and Tyrhenian seas” (MAT) Monitoring along the profile Rovinj- the Po delta. (Ministry of environmental protection of the Republic of Italy)