9780521861724htl 1..2

Polydora caeca Nerine foliosa

Pygospio elegans

Magelona papillicornis

Lagis koreni

Spiophanes bombyx Lanice conchilega

Polydora

ciliata

1 mm

Figure 11.6Late stage marine

polychaete larvae at the size

they begin to settle from the

plankton to the seabed (after

Thorson, 1946 ).

1.5

2

2.5

3

3.5

4

4.5

63 125 250 500 1000

Sieve mesh size (μm)

Shannon diversity (H’log

)e

Figure 11.7Species diversity in samples

extracted from the sediment using a range

of sieve mesh sizes on a sandflat in the

Isles of Scilly, UK (after Warwicket al.,

2006 ).

BODY SIZE AND DIVERSITY IN MARINE SYSTEMS 219