SVIBOR - Project code: 1-07-145


Strossmayerov trg 4, HR - 10000 ZAGREB
tel.: +385 1 459 44 44, fax: +385 1 459 44 69


SVIBOR - Collecting Data on Projects in Croatia

Project code: 1-07-145

Eutrophication in a stratified estuary

Main researcher: LEGOVIĆ, TARZAN (25590)

Type of research: basic
Duration from: 01/01/91. to 12/31/95.

Papers on project (total): 94
Papers on project quoted in Current Contents: 37
Institution name: Institut "Ruđer Bošković", Zagreb (98)
Department/Institute: Center for Marine Research - Zagreb, Laboratory for Ecological Modelling
Address: P.P. 1016, Bijenička 54, Zagreb, Croatia.
City: 10000 - Zagreb, Croatia
Phone: 385 (0)1 461 111
Fax: 385 (0)1 425 497

Summary: Eutrophication is a state of estuarine ecosystem under increased inflow of nutrients. Investigated are fundamental physical, chemical and biological processes in the stratified estuary and coastal sea and their effect on eutrophication. By application of existing and development of new methods, organic films are characterized and their role in eutrophication and accumulation of pollutants is investigated. Of particular importance is the accumulation of organic particles and pollutants at density interfaces (halocline), formation of organic films and their rola in the eutrophication phenomena, and fate of pollutants. Organic thin films are characterized at natural interfaces (halocline) and model interfaces (electrode/solution). Transformations of dissolved organic matter and particles, including the unicellular organisms, are studied at model interfaces. Organic and organometalic thin films of high charge density are investigated as new materials for sensors. Models are developed for reconstruction and prediction of consequences in the estuary and neighbouring coastal sea of man induced changes in nutrient and pollutant inflow.

Keywords: eutrophication, estuary, halocline, nutrients, pollutants,organic matter, surface active matter, phase transformations,heterocoalescence, hypoxia, heterotrophic bacteria,phytoplankton, organic films, organometallic films, counter ofsurface active particles, electrochemistry, ecological modelling

Research goals: GOALS: By applying the existing and by developing new methods of characterization of biogeochemical processes and organic structures at the salinity gradient (halocline) and by formulation of new models of transport of substances and biological interactions, following will be examined: 1) organic films which are formed by transformation of allochtonous surface active particles and phytoplankton exudates which includes: condensation, heterocoalescence and spreading; 2) transport processes of particles, dissolved matter (inluding oxygen) and heat through the halocline as well as growth and transport of (fresh and marine) phytoplankton; 3) possibility to predict biological and chemical consequences of antropogenic and natural nutrient and pollutant inflows in estuaries and associated coastal seas. EXPECTED RESULTS: Understanding of: a) formation of organic films on the salinity gradient; b) impact of material input on formation and decomposition of the films; c) impact of atmospheric perturbations and sea currents on the film stability; d) hydrophobic pollutant accumulation on the film; e) heat transport and its effect on primary production and degradation rates; f) oxygen transport; h) dynamics of phytoplankton. New methods: a) Electrochemical counter of surface active particles; b) method for characterization of individual surface active particles and phytoplankton cells; c) method for preparation and characterization of organic and organometallic films; d) molecular detectors for characterization of adatoms; e) method for calculating exchange of water masses and particles in estuaries; f) model of particle transport in 2-dimensions; g) method for calculating total balance of nutrients and pollutants in estuaries and coastal seas; h) ecological model of the dynamics of phytoplankton and oxygen in a stratified estuary and coastal seas. NEW MATERIALS: a) stable 2-dimensional compounds of heteroaromatic molecules with sulphur; b) organometalic films with high electron density.


  1. Name of project: Transport i disperzija tvari u polju slučajnih brzina
    Name of institution: Matematika, Prirodoslovno-matematički fakultet, Sveučilište u Zagrebu
    City: 10000 - Zagreb, Croatia

  2. Name of project: Development de methodes electroanalitique et d'instrumentation correspondante pour la recherce d'environment aqueux
    Name of institution: Laboratoire d'Electrochimie, Universite Pierre et Marie Curie
    City: 75230 - Pariz, Francuska

  3. Name of project: Electrochimie des composes de surface: nouveaux composes bidimensionales des molecules heterocycliques
    Name of institution: Laboratoire d'Electrochimie Interfaciale du CNRS
    City: 92195 - Meudon/Bellevue, Francuska

  4. Name of project: Electrogeneration and properties of tetraalkylammonium-antimony
    Name of institution: The Graduate School, University of Minnesota
    City: Minneapolis, SAD

  5. Name of project: 7405/EP Development of electrochemical methodology for direct measurements of dissolved and dispersed organic matter in coastal and estuarine waters
    Name of institution: International Atomic Energy Agency
    City: Beč, Austrija

  6. Name of project: Application of European Regional Seas Ecological Model to the Adriatic Sea
    Name of institution: Plymouth Marine Laboratory
    City: Plymouth, UK

  7. Name of project: Management optimal se la mer cotiere contre la pollution
    Name of institution: Observatoire Oceanologique
    City: Villefranche-sur-mer, France

  8. Name of project: Balance of nutrients in a coastal sea
    Name of institution: Centre d'Estudis Avancats de Blanes, Cami de Santa Barbara s/n
    City: 17300 - Blanes, Espana

  9. Name of project: Organic electroreductions, synthesis and the role of tetraalkylammonium ions
    Name of institution: National Science Foundation
    City: Minneapolis, SAD

  10. Name of project: Nacionalni monitoring zagađenja Jadrana područja Krke i Kornata
    Name of institution: Ministarstvo graditeljstva i zaštite okoliša
    City: 10000 - Zagreb, Croatia


  1. Name of institution: Državni hidrografski institut
    Type of institution: Institution whose primary activities ar
    City: 21000 - Split, Croatia

  2. Name of institution: Department of Chemistry, University of Minnesota, Minneapolis
    Type of institution: Economical/Production
    City: Minneapolis, SAD

  3. Name of institution: Universite Pierre et Marie Curie, Laboratoire d'Electrochimie
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: 75230 - Pariz, Francuska

  4. Name of institution: Centre National de la Recherche Sceintifique, Laboratoire d'Electrochimie des Interfaces
    Type of institution: University/Faculty
    City: 92195 - Meudon/Bellevue, Francuska

  5. Name of institution: Universite Pierre et Marie Curie, Laboratoire de Physique et Chimie Marines
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: 75230 - Pariz, Francuska

  6. Name of institution: Swiss Federal Institute for Aquatic Sciences EAWAG/ETH
    Type of institution: State institute
    Type of cooperation: Joint project
    City: 8600 - Dubendorf/Zurich, Švicarska

  7. Name of institution: Ministarstvo graditeljstva i zaštite okoliša
    Type of institution: State administration
    Type of cooperation: Joint project
    City: 10000 - Zagreb, Croatia

  8. Name of institution: Scientific Technological Research Council (TUBITAK)
    Type of institution: State institute
    Type of cooperation: Systematic exchange of experts
    City: 41470 - Gebze, Turska

  9. Name of institution: UNEP-Mediterranean Action Plan
    Type of institution: International organization
    Type of cooperation: Joint project
    City: Atena, Grčka

  10. Name of institution: Nacionalni Park Krka
    Type of institution: Economical/Production
    Type of cooperation: Joint project
    City: 22000 - Šibenik, Croatia


  1. Name: Nagrada Rudjer Boskovic za znacajno znastveno otkrice
    Type of achievement: Other
    Authors: Dr. Vera Zutic i dr. Tarzan Legovic

Other information about the project.
MZT Croatian language SVIBOR Alphabetic list Sorted on project code Sorted on institutions Search help
Ministry of
Science and
Sorted on
project code
Sorted on
Search Help

Last update: 09/27/95