A mediterranean polychaete community was studied for 10 years since the first settlement to examine community dynamics and to compare it with the model proposed by Hughes (1984) for benthic invertebrates. Cluster analysis (Q-mode) pointed out the presence of four main periods during
the colonization process in agreement with edaphic changes produced by the colonization and disappearance of mussels. During this time the pattern of species abundance changed from a log series distribution (with few dominant species) towards a truncated log normal distribution (with many
rare species) characteristic of a more complex community structure.
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