Dj. Morrisey et al., THE BENTHIC ECOLOGY OF RIVER ESTUARIES ENTERING THE SEVERN ESTUARY, Biological Journal of the Linnean Society, 51(1-2), 1994, pp. 247-251
The fauna of the Rivers Avon, Usk and Wye was similar to that for soft
sediment in the Severn Estuary. It was dominated by Nereis diversicol
or, Corophium volutator, Macoma balthica and oligochaetes. Maximum den
sities of Corophium and Macoma were higher than in the main estuary, w
hile that of Nereis was similar. Distributions of dominant species sho
wed gradients along river length and across river profile. These are d
iscussed.