Liège Colloquium

2006 LIège Colloquium

Program Liege Colloquium 2006

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38th International Liège Colloquium on Ocean Dynamics

Revisiting the Role (or Status) of Zooplankton in Pelagic Ecosystems

Liège, May 8-12, 2006




Zooplankton occupy a key role in pelagic ecosystems, since they control phytoplankton biomass, size composition and diversity. Through their grazing activity, zooplankton contribute to export organic matter to the deep sea and the benthos, by faecal pellets production and vertical migrations, thus exerting a control on biogechemical cycles. Zooplankton abundance and diversity largely determine the diversity, abundance and recruitment of fish and other large animals. Many key zooplankton related processes involved in the dynamics of phytoplankton and fish have been neglected, and pathways in the food web incorrectly identified. The spatial heterogeneity of zooplankton distributions has rarely been investigated in terms of ecosystems. A holistic approach to pelagic ecosystems requires not only information on fluxes and biomasses, but also realistic identification of pathways among the dominant state variables of ecosystems. The sharp seasonal, inter-annual and spatial variability of zooplankton, which is controlled by natural variability and climatic changes, is being recognised as a key factor in the dynamics of ocean resources.

The 38th International Liège Colloquium on Ocean Hydrodynamics will provide the opportunity for reviewing recent developments on:

  • Roles of the different zooplankton components in controlling pelagic food webs: respective roles of micro-, meso- and macro-zooplankton, gelatinous predators, and mixotrophs.
  • Influence of long-term changes in physics (circulation) and climate on the abundance and diversity of zooplankton organisms.
  • Influence of small-scale physical variability on the behaviour, population dynamics and spatial distribution of zooplankton.
  • Roles of zooplankton diversity and abundance on the recruitment of fish; Ichtyoplankton.
  • Influence of fish predators on the structure and diversity of zooplankton and pelagic systems.
  • Effects of zooplankton dynamics on biogeochemical fluxes.
  • Recent developments in ocean dynamics/zooplankton modelling.
  • Adaptation to extreme environments (e.g. deep sea, sea ice).
  • New technologies (e.g. genetics, sampling).

All approaches are welcome, including: field sampling, remote sensing, laboratory experiments and modelling exercises.

Contributions concerning phytoplankton, fish, top predators (marine mammals and birds) and benthos are welcome as far as they address the theme of the Colloquium.

The areas of interest of the Colloquium include all oceans, but specific sessions will be devoted to areas like polar seas, Mediterranean, open ocean or coastal environment. Relevant comparison with fresh water zooplankton systems will be considered.

Sessions devoted to the standardisation and inclusion in data bases of long-term field series and to syntheses from multidisciplinary programmes will be organised. Since most of recent zooplankton research was involved in international, national and regional interdisciplinary programs (e.g. GLOBEC, EUR-OCEANS, ICES, CIESM), papers with a synthesis aspect are especially encouraged.




  • Miguel ALCARAZ, Instituto de Ciencias del Mar, Barcelona, Spain.
  • Valérie ANDERSEN, Laboratoire d’Océanographie de Villefranche s/mer, France
  • Ulrich BATHMANN, Alfred-Wegener Institut. Bremerhaven, Germany.
  • Grégory BEAUGRAND, Univ. Sc. et Tech. de Lille, Wimereux France.
  • François CARLOTTI Université de Marseille, France.
  • Négib DALY YAHIA, FSB, Bizerte, Tunisia.
  • Jean-Pierre DESCY, Fondation Universitaire Notre Dame de la Paix, Namur, Belgium.
  • Anne GOFFART, Aquapole University of Liège, Belgium.
  • Gaby GORSKY, Laboratoire d’Océanographie de Villefranche s/mer. France.
  • Alexandra D. GUBANOVA Institute of Biology of the Southern Seas, Sevastopol. Ukraine.
  • Roger HARRIS Plymouth Marine Laboratory, United Kingdom.
  • Jean-Henri HECQ, University of Liège, Belgium.
  • Xabier IRIGOYEN, Technological Institute for fisheries and Food, Pasaia, Spain.
  • Philippe KOUBBI, Université du Littoral Côte d’Opale, Wimereux, France.
  • Louis LEGENDRE, Laboratoire d’Océanographie de Villefranche s/mer. France.
  • Maria Grazia MAZZOCCHI. Stazione Zoologica 'A. Dohrn' Napoli Italy
  • Jacques C. J. NIHOUL, University of Liège, Belgium.
  • Francesc PAGES Institut de Ciències del Mar, Barcelona, Spain.
  • Philip, Chris REID, Sir Allister Hardi Foundation for Ocean Sciences, United Kingdom.
  • Allan ROBINSON, Harvard University, Cambridge, USA.
  • Ana SABATES, CSIC, Barcelona, Spain
  • Ioanna SIOKOU FRANGOU Hellenic Centre for Marine Research, Greece.
  • Sigrid B. Schnack-Schiel Alfred-Wegener Institut. Bremerhaven.
  • Sun SONG, Qingdao, China.



The members of the Organizing Committee wish to express their gratitude to:

for their valuable assistance in organizing the Colloquium.



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