| A summer cruise in the north-western Mediterranean was devoted to the study of biological production and ecological characteristics of the upper waters in the divergence area. Macroplankton and micronekton,which are the subject of particular attention, consist mainly of Cnidaria and Euphausiids respectively, and are very abundant in summer; one may thus espect them to play a significant role in the trophic re1ationships of the ecosystem. They are both studied here under their qualitative and quantitative aspects, in connection with the three hydrologically distinct regions which were covered during the cruise. [NOT CONTROLLED OCR] |
