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the underlying velocity field and also if larger size classes were affected by the
velocity field (not shown).
E. Effects of Simulated Phytoplankton Bloom
For the seasonal, spatially advecting plankton bloom, a seasonal pulse in the
density distribution of the smallest size classes was observed, whereby a
wavefront followed the path of the bloom, leaving smaller individuals in its
wake, which decayed away in the off season. This spatial variation did not
propagate up into the larger sizes, and for these a more stable spatial
distribution persisted throughout and between seasons which were reason-
ably evenly distributed over the path of the plankton bloom (
Figure 4
). There
Figure 4
The spatial evolution of three size classes during a 3-month plankton
'bloom'. The left column shows the density of a moving plankton 'bloom'. The central
column shows a moving front in the smaller consumer-size classes tracking the bloom.
The right column shows a move stable distribution in the larger size classes.
