Vertical Distribution of Zooplankton in the Area of the Frontal Zone of the Gulf Stream and Subpolar Waters (Titanic Test Area)in the Summer 2003

摘要

In the summer of 2003,we continued the long-term series of observations over the zooplankton community in the area of the frontal zone of the Gulf Stream in the North Atlantic,where interaction of the ecosystems of subpolar and warm waters takes place.Depending on the hydrological situation occurring in the frontal zone,interrelated interannual variations in the abundance of the mass planktonic species including Cala-nus hyperboreus and the mesopelagic shrimps of the genus Acanthephyra are observed.In different years,the contribution of two parallel trophic nets passing primarily through the larger and smaller plankters to the formation of the "face" of the community varies.The data on the size structure of the population of macroplank-tonic shrimps are presented.