On the factors controlling phytoplankton ice edge blooms in the marginal ice zone of the northwestern Weddell Sea during sea ice retreat 1988

摘要: The factors controlling phytoplankton bloom development in the marginal ice zone of northwestern Weddell Sea has been investigated during EPOS expedition through measurements physical and chemical processes biological activities associated with process melting their variables. Among these, light limitation mediated by vertical stability cover, trace metal deficiency grazing pressure received attention. combined observations studies show that initiation was determined operating at time melting. additional effects protozoa deep mixing appeared responsible for a rather moderate biomass (4mgChl.a m−3) also relatively narrow geographical extent. importance each factor seasonal edge delineated suite simulation coupled physical-biological model. This analysis clearly shows wind events – duration, strenght frequency determine distance sea respect to as well occurrence ice-free area secondary blooms summer period. maximum concentration reached is on other hand primarily pressure. Finally, observed decline due combination events.