Villefranche Point B
Cote d'Azur
Latitude:   43.6830     Longitude:   7.3170

 Associated Investigators:
Gabriel Gorsky ,
Lars Stemmann  

Related Web Sites:
[www.obs-vlfr.fr/Rade/RadeZoo/]  

The Villefranche Point B dataset consists of more than 30 years of samples collected off Villefranche at 43 41 N 07 19 E. Samples were collected by a vertical tow from bottom to surface (75-0 m), using a Juday-Bogorov net (1996-2003, 330 µm mesh) and WP2 net (1995-2012, 200 µm mesh). Copepod abundance was counted from ongoing and historical samples using the wet-bed image scanning technique of ZooScan (Gorsky et al., 2010).

Copepod abundance was highest during the well-mixed winter period, followed by a general decline, with rising water temperatures and increasing stratification in the 1990s (Garcia Comas et al., 2011). After year 2000, the mesozooplankton abundances reached again the abundance values of the 1980s (Vandrome et al., 2012).

REFERENCES:

Garcia-Comas, C., Stemmann, L., Ibanez, F., Berline, L., Mazzocchi, M.G., Gasparini, S., Picheral, M., Gorsky, G., 2011. Zooplankton long-term changes in the NW Mediterranean Sea: Decadal periodicity forced by winter hydrographic conditions related to large-scale atmospheric changes? Journal of Marine Systems 87 (3-4), 216-226.


Gorsky, G., Ohman, M.D., Picheral, M., Gasparini, S., Stemmann, L., Romagnan, J.B., Cawood, A., Pesant, S., Garcia-Comas, C., Prejger, F., 2010. Digital zooplankton image analysis using the ZooScan integrated system. Journal of Plankton Research 32 (3), 285-303.


Vandromme, P., Stemmann, L., Berline, L., Gasparini, S., Mousseau, L., Passafiume, O., Guarini, J.-M., Gorsky, G., 2012. Zooplankton communities fluctuations from 1995 to 2005 in the Bay of Villefranche-sur-Mer (Northern Ligurian Sea, France). Biogeosciences 8, 3143-3158.