Unpublished conference/Abstract (Scientific congresses and symposiums)
Long-term fluctuations (1979 – 2008) of the phytoplankton dynamics in the Bay of Calvi (Corsica, NW Mediterranean): relations with wind stress variability and NAO index
[en] The development of the winter-spring phytoplankton bloom is investigated in the oligotrophic Bay of Calvi (Corsica, Ligurian Sea, Northwestern Mediterranean) since 1979.
Time-series results enlighten that changes in environmental conditions in the Corsican sector have altered the coastal phytoplankton dynamics and induced a drastic reduction of the winter-spring phytoplankton biomass over the last three decades.
At the local scale, variations in winter wind stress control the development of the winter-spring phytoplankton bloom and the structure of the phytoplankton assemblages. Results emphasize that the total phytoplankton biomass (chl a) is higher during high winter wind stress years. From a specific point of view, flagellates are always the dominant component of the phytoplankton bloom communities. However, diatoms tend to be more abundant during high winter wind stress years.
At a wider scale, a link between the intensity of the phytoplankton bloom and the winter NAO index is established.
Lastly, the decrease in phytoplankton abundance coincides with changes in zooplankton populations. As a consequence, the entire pelagic food web dynamics is affected by climate variations and the ecosystem resilience is threatened.
Research Center/Unit :
MARE - Centre Interfacultaire de Recherches en Océanologie - ULiège
Disciplines :
Aquatic sciences & oceanology
Author, co-author :
Goffart, Anne ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Hecq, Jean-Henri ; Université de Liège - ULiège > Département des sciences et gestion de l'environnement > Océanologie
Language :
English
Title :
Long-term fluctuations (1979 – 2008) of the phytoplankton dynamics in the Bay of Calvi (Corsica, NW Mediterranean): relations with wind stress variability and NAO index
Publication date :
2008
Event name :
EUR-OCEANS Network of Excellence European : Conference on « Global Change and Marine Ecosystems »
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