Laboratory for marine microbial ecology

Laboratory for marine microbial ecology

We are studying the ecology and evolution of microbial communities. In focus of our interest are biotic and abiotic factors that generate and maintain microbial diversity. In turn, we seek to understand the implications of microbial diversity for ecosystem functioning.

Mirjana Najdek Dragić

Head

PhD Mirjana Najdek Dragić

+385 52 804 727
Fax: +385 52 804 780
left right

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.

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 macroalgae, including invasive species.

Ingrid Ivančić
dr.

senior scientific associate
+385 52 804 743
743

Maria Blažina
Ph. D.

scientific associate
+385 52 804 767
767
+385 98 255 221

Marino Korlević
PhD

Postdoc
+385 52 804 768
768

Mirjana Najdek Dragić
PhD

senior scientist
+385 52 804 727
727
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Biodiversity and biotechnological characterization of bacteria of the Adriatic Sea

Glavni istraživač / voditelj: Sandi Orlić

Oceans are very complex ecosystem in which microorganisms play an important role in biogeochemical processes and in the cycling of matter.

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Functional analyssis and molecular characterization of yeast

Functional analyssis and molecular characterization of yeast

Glavni istraživač / voditelj: Sandi Orlić

Wine production as a biotechnological process is based on traditional alcohol fermentation technology, where different yeast species have main role. Application of modern molecular techniques, such as analysis on the level of genome, transcriptome and proteome, enables determination of their phylogenetic linkage and physiological activity.

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Picoplankton function and diversity along Northern Adriatic trophic gradients (PICOADRIF)

Picoplankton function and diversity along Northern Adriatic trophic gradients (PICOADRIF)

Glavni istraživač / voditelj: Maria Blažina

Maintenance and preservation of high quality water resources and biological diversity directly having an effect on tourism, fisheries and aquaculture are major tools of socio-economic improvement of the Croatian coastal management.

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Seasonal changes in picoplankton composition in the Northern Adriatic Sea as assessed by CARD-FISH and fingerprinting

Seasonal changes in picoplankton composition in the Northern Adriatic Sea as assessed by CARD-FISH and fingerprinting

Glavni istraživač / voditelj: Sandi Orlić

The picoplankton, composed of Bacteria and Archaea, plays a significant role in marine food webs and in most biogeochemical cycles in marine systems.

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Structure and physiology of microbial community in northern Adriatic frontal zones

Structure and physiology of microbial community in northern Adriatic frontal zones

Glavni istraživač / voditelj: Mirjana Najdek Dragić

During the last fifteen years in the northern Adriatic, changes in hydrological regime and exchange of water masses were noticed, as well as an increased frequency of mucilage events. This phenomenon is related to the organic carbon cycle, being favoured when expressed horizontal and vertical gradients occur.

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Uncovering composition and diversity of marine picophytoplankton in northern Adriatic coastal waters

Uncovering composition and diversity of marine picophytoplankton in northern Adriatic coastal waters

Glavni istraživač / voditelj: Tina Šilović

Our knowledge of the diversity of picoplankton is very limited for the Adriatic Sea, so developing methods for assessing and monitoring their ecology and diversity is essential for understanding their contribution in food web dynamics and biochemical cycles.

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MICRO-SEAGRASS

Unravelling the complexity of microbial dynamics in invaded seagrass meadows

Glavni istraživač / voditelj: Mirjana Najdek Dragić

Seagrasses are among the most valuable biological systems on Earth. They serve as feeding and nursery habitat for many species; their root and rhizome systems bind and stabilize bottom sediments while leaves baffle currents and improve water quality.

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