“…Pyrene is a particle reactive compound , log K OW between 4.50 and 5.32 (Meador et al, 1995), and its distribution is thus highly dependent on forces affecting particle mixing, such as macrofaunal feeding and burrowing. Species-specific differences in bioturbation behaviour often appear to leave finger prints in the distribution of contaminants in the sediment (Holmer et al, 1997, Kure & Forbes, 1997, Gunnarsson et al, 1999a, Gunnarsson et al, 1999b, Sandnes, Forbes, Hansen & Sandnes, 2000. N. diversicolor build, and continuously re-route, extensive burrow galleries (Davey, 1994), while A. filiformis, although sometimes observed to be highly mobile, construct only as much burrow needed for keeping disks buried at ~5 cm depth with 2-4 arms protruding from the sediment for feeding (Woodley, 1975, Jonsson, Broman, Gunnarsson, Lagergren, Larsson, Ohlsson et al, 1997 ( Fig.…”