| The Benthic Boundary Layer (BBL) macrofauna over a coarse sand community at Trezen Vraz (western English Channel) was sampled with a modified Macer-GIROQ hyperbenthic sledge to analyse its diel changes on two occasions, in November 1988 (9 hauls), and in July 1990 (11 hauls). Species composition of the fauna, swimming activities, daily vertical migrations, biomass of the principal taxa, and biomass exchanges between the BBL, the benthos, and the pelages were studied. Sixty-one taxa in November and 129 taxa in July were sorted, counted, and classified into three groups: mesozooplankton, macrozooplankton, and hyperbenthos. In the mesozooplankton, copepods and crustacean larvae were very abundant in July. In the macrozooplankton, the chaetognath Sagitta... |
