Estrada, M. Institut de Ciencies del Mar (CSIC), marta@icm.csic.es

 
RELATIONSHIPS BETWEEN HYDROGRAPHICAL CHARACTERISTICS OF THE WATER COLUMN AND PHYTOPLANKTON ABUNDANCE IN AN OLIGOTROPHIC SEA
 
Seasonal mixing of the water column is one of the large scale mechanisms of fertilization in the Mediterranean Sea. The extent of this mixing is modulated by bottom topography and frontal structures and presents strong interannual variability. This communication presents an overview of the relationships between hydrographical characteristics of the water column and phytoplankton abundance in the Catalano-Balearic Sea (NW Mediterranean). Data were obtained during four cruises carried out at different times of the year, between 1990 and 1993. When the pooled data set is considered, phytoplankton biomass and abundance is correlated with mixing intensity, as measured by a stratification index based on vertical differences in water density. This relationship does not hold for the summer cruises, in which phytoplankton biomass and abundance is related to the pycnocline depth, in turn determined by the water circulation patterns in the Catalano-Balearic basin.
 
Day: Thursday, Feb. 4
Time: 12:00 - 12:15pm
Location: Hilton of Santa Fe
 
Code: SS04TH1200H