The results of this experiment were very similar to those of the first one. Both experiment dealt with the same benthic population, but after different duration of benthic life. The percentage of benthic cells recruited was very similar, as shown in Table I. The second experiment revealed a similar kinetic pattern to that observed for the same benthic population just after it had sediment (in the first experiment described above). A maximum recruitment rate was measured on the first day, followed by vert low recruitment rate until the end of the experiment. Similarly, sediment mixing was the only condition that significantly promoted benthic recruitment, whatever the light or temperature condition, and of both the maximum recruitment rate on the first day and the proportion of benthic cells recruited during the entire experiment. Moreover, the percentages of recruited cells recorded with or without mixing were in the same range in both experiments. The other factors, namely the temperature and the presence or absence of light, did not seem to impact significantly on either the recruitment rates or the proportion of benthic cells recruited during the entire experiment.