Articles

Title:	Phytoplankton in the Hel upwelling region (the Baltic Sea)
Authors:	Gromisz Sławomira Szymelfenig Maria
Abstract:	The influence of upwelling on qualitative and quantitative phytoplankton composition was estimated based on the material collected during seven upwelling events along the northern seaside of the Hel Peninsula (the southern Baltic Sea) between April 2000 and August 2002. As a result of disturbing upwelling effect on hydrological conditions, local changes in taxonomic composition, biovolume and species diversity of phytoplankton assemblages were observed. The most significant differences in phytoplankton taxonomic compositions were noted when the distance and the differences in water temperature between the upwelling centre and the reference area were the biggest. The number of identified taxa and phytoplankton biovolume were much lower in the upwelling centre as compared to the area outside the direct upwelling influence. However, in most cases a decrease in Hurlbert’s index of species diversity was not found in the upwelling centre. In the upwelling centre, as a consequence of a considerably lower autotroph biovolume, an increase in heterotroph percentage in total biovolume of the identified organisms was also noted. When the upwelling evolution was directly preceded by phytoplankton bloom, both dominance and biovolume of the most abundant species were distinctly reduced.
DOI:
Type of paper:	Original research paper
Pages:	115 to 135
Cytation:	Gromisz S., Szymelfenig M., 2005, Phytoplankton in the Hel upwelling region (the Baltic Sea), Ocean. Hydrob. Studies, 34(Supl. 2): 115-135
Keywords:	coastal upwelling, Baltic Sea, Hel Peninsula, phytoplankton diversity
Year:	2005
Category:
Download:	Download file "259.pdf"